Black hOle Optical-polarization TimE-domain Survey

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Links to deliverables and publications from FP7 projects, as well as links to some specific result types such as dataset and software, are dynamically retrieved from OpenAIRE .

Publications

The high energy X-ray probe (HEX-P): the most powerful jets through the lens of a superb X-ray eye

Author(s): Lea Marcotulli, Marco Ajello, Markus Böttcher, Paolo Coppi, Luigi Costamante, Laura Di Gesu, Manel Errando, Javier A. García, Andrea Gokus, Ioannis Liodakis, Greg Madejski, Kristin Madsen, Alberto Moretti, Riccardo Middei, Felicia McBride, Maria Petropoulou, Bindu Rani, Tullia Sbarrato, Daniel Stern, Georgios Vasilopoulos, Michael Zacharias, Haocheng Zhang, null null
Published in: Frontiers in Astronomy and Space Sciences, Issue 11, 2024, ISSN 2296-987X
Publisher: Frontiers Media SA
DOI: 10.3389/FSPAS.2024.1290057

Broadband multi-wavelength properties of M87 during the 2018 EHT campaign including a very high energy flaring episode

Author(s): J. C. Algaba, M. Baloković, S. Chandra, W.-Y. Cheong, Y.-Z. Cui, F. D’Ammando, A. D. Falcone, N. M. Ford, M. Giroletti, C. Goddi, M. A. Gurwell, K. Hada, D. Haggard, S. Jorstad, A. Kaur, T. Kawashima, S. Kerby, J.-Y. Kim, M. Kino, E. V. Kravchenko, S.-S. Lee, R.-S. Lu, S. Markoff, J. Michail, J. Neilsen, M. A. Nowak, G. Principe, V. Ramakrishnan, B. Ripperda, M. Sasada, S. S. Savchenko, C. Sheridan, K. Akiyama, A. Alberdi, W. Alef, R. Anantua, K. Asada, R. Azulay, U. Bach, A.-K. Baczko, D. Ball, B. Bandyopadhyay, J. Barrett, M. Bauböck, B. A. Benson, D. Bintley, L. lackburn, R. Blundell, K. L. Bouman, G. C. Bower, H. Boyce, M. Bremer, R. Brissenden, S. Britzen, A. E. Broderick, D. Broguiere, T. Bronzwaer, S. Bustamante, J. E. Carlstrom, A. Chael, C.-k. Chan, D. O. Chang, K. Chatterjee, S. Chatterjee, M.-T. Chen, Y. Chen, X. Cheng, I. Cho, P. Christian, N. S. Conroy, J. E. Conway, T. M. Crawford, G. B. Crew, A. Cruz-Osorio, R. Dahale, J. Davelaar, M. De Laurentis, R. Deane, J. Dempsey, G. Desvignes, J. Dexter, V. Dhruv, I. K. Dihingia, S. S. Doeleman, S. A. Dzib, R. P. Eatough, R. Emami, H. Falcke, J. Farah, V. L. Fish, E. Fomalont, H. A. Ford, M. Foschi, R. Fraga-Encinas, W. T. Freeman, P. Friberg, C. M. Fromm, A. Fuentes, P. Galison, C. F. Gammie, R. García, O. Gentaz, B. Georgiev, R. Gold, A. I. Gómez-Ruiz, J. L. Gómez, M. Gu, R. Hesper, D. Heumann, L. C. Ho, P. Ho, M. Honma, C.-W. L. Huang, L. Huang, D. H. Hughes, S. Ikeda, C. M. V. Impellizzeri, M. Inoue, S. Issaoun, D. J. James, B. T. Jannuzi, M. Janssen, B. Jeter, W. Jiang, A. Jiménez-Rosales, M. D. Johnson, A. C. Jones, A. V. Joshi, T. Jung, R. Karuppusamy, G. K. Keating, M. Kettenis, D.-J. Kim, J. Kim, J. Kim, J. Y. Koay, P. Kocherlakota, Y. Kofuji, P. M. Koch, S. Koyama, C. Kramer, J. A. Kramer, M. Kramer, T. P. Krichbaum, C.-Y. Kuo, N. La Bella, A. Levis, Z. Li, R. Lico, G. Lindahl, M. Lindqvist, M. Lisakov, J. Liu, K. Liu, E. Liuzzo, W.-P. Lo, A. P. Lobanov, L. Loinard, C. J. Lonsdale, A. E. Lowitz, N. R. MacDonald, J. Mao, N. Marchili, D. P. Marrone, A. P. Marscher, I. Martí-Vidal, S. Matsushita, L. D. Matthews, L. Medeiros, K. M. Menten, I. Mizuno, Y. Mizuno, J. Montgomery, J. M. Moran, K. Moriyama, M. Moscibrodzka, W. Mulaudzi, C. Müller, H. Müller, A. Mus, G. Musoke, I. Myserlis, H. Nagai, N. M. Nagar, D. G. Nair, M. Nakamura, G. Narayanan, I. Natarajan, A. Nathanail, S. Navarro Fuentes, C. Ni, J. Oh, H. Okino, H. Olivares, T. Oyama, F. Özel, D. C. M. Palumbo, G. Filippos Paraschos, J. Park, H. Parsons, N. Patel, U.-L. Pen, D. W. Pesce, V. Piétu, A. PopStefanija, O. Porth, B. Prather, D. Psaltis, H.-Y. Pu, R. Rao, M. G. Rawlings, A. W. Raymond, L. Rezzolla, A. Ricarte, F. Roelofs, C. Romero-Cañizales, E. Ros, A. Roshanineshat, H. Rottmann, A. L. Roy, I. Ruiz, C. Ruszczyk, K. L. J. Rygl, S. Sánchez, D. Sánchez-Argüelles, M. Sánchez-Portal, K. Satapathy, T. Savolainen, F. P. Schloerb, J. Schonfeld, K.-F. Schuster, L. Shao, Z. Shen, D. Small, B. W. Sohn, J. SooHoo, L. D. Sosapanta Salas, K. Souccar, J. S. Stanway, H. Sun, F. Tazaki, A. J. Tetarenko, P. Tiede, R. P. J. Tilanus, M. Titus, K. Toma, P. Torne, T. Toscano, E. Traianou, T. Trent, S. Trippe, M. Turk, I. van Bemmel, H. J. van Langevelde, D. R. van Rossum, J. Vos, J. Wagner, D. Ward-Thompson, J. Wardle, J. E. Washington, J. Weintroub, R. Wharton, M. Wielgus, K. Wiik, G. Witzel, M. F. Wondrak, G. N. Wong, Q. Wu, N. Yadlapalli, P. Yamaguchi, A. Yfantis, D. Yoon, A. Young, Z. Younsi, W. Yu, F. Yuan, Y.-F. Yuan, J. A. Zensus, S. Zhang, G.-Y. Zhao, S.-S. Zhao, R. Bellazzini, B. Berenji, E. Bissaldi, R. D. Blandford, R. Bonino, P. Bruel, R. A. Cameron, P. A. Caraveo, E. Cavazzuti, C. C. Cheung, S. Ciprini, P. Cristarella Orestano, S. Cutini, N. Di Lalla, A. Dinesh, L. Di Venere, A. Domínguez, S. J. Fegan, A. Franckowiak, Y. Fukazawa, P. Fusco, F. Gargano, C. Gasbarra, S. Germani, M. Giliberti, I. A. Grenier, E. Hays, D. Horan, M. Kuss, S. Larsson, I. Liodakis, F. Longo, F. Loparco, M. N. Lovelle
Published in: Astronomy & Astrophysics, Issue 692, 2024, ISSN 0004-6361
Publisher: EDP Sciences
DOI: 10.1051/0004-6361/202450497

PKS 2131−021—Discovery of Strong Coherent Sinusoidal Variations from Radio to Optical Frequencies: Compelling Evidence for a Blazar Supermassive Black Hole Binary

Author(s): S. Kiehlmann; P. V. de la Parra; A. G. Sullivan; A. Synani; I. Liodakis; P. Mróz; S. K. Næss; A. C. S. Readhead; M. C. Begelman; R. D. Blandford; K. Chatziioannou; Y. Ding; M. J. Graham; F. Harrison; D. C. Homan; T. Hovatta; S. R. Kulkarni; M.L. Lister; R. Maiolino; W. Max-Moerbeck; B. Molina; C. P. O’Dea; V. Pavlidou; T. J. Pearson; M.F. Aller; C. R. Lawrence; T. J. W. Lazio; S. O’Neill; T. A. Prince; V. Ravi; R.A. Reeves; K. Tassis; M. Vallisneri; J. A. Zensus
Published in: The Astrophysical Journal, 2025, ISSN 2041-8213
Publisher: IOP Science
DOI: 10.48550/ARXIV.2407.09647

Observations of Low and Intermediate Spectral Peak Blazars with the Imaging X-Ray Polarimetry Explorer

Author(s): Marshall, Herman; Liodakis, Ioannis; Marscher, Alan; Di Lalla, Niccolò; Jorstad, Svetlana; Kim, Dawoon; Middei, Riccardo; Negro, Michela; Omodei, Nicola; Peirson, Abel; Perri, Matteo; Puccetti, Simonetta; Laurenti, Marco; Agudo, Iván; Bonnoli, Giacomo; Berdyugin, Andrei; Cavazzuti, Elisabetta; Rodriguez Cavero, Nicole; Donnarumma, Immacolata; Di Gesu, Laura; Jormanainen, Jenni; Krawczynski, Henric; Lindfors, Elina; Madjeski, Greg; Marin, Frédéric; Massaro, Francesco; Pacciani, Luigi; Poutanen, Juri; Tavecchio, Fabrizio; Kouch, Pouya; Aceituno, Francisco; Bernardos, Maria; Casanova, Víctor; García-Comas, Maya; Agís-González, Beatriz; Husillos, César; Marchini, Alessandro; Sota, Alfredo; Blinov, Dmitry; Bourbah, Ioakeim; Kielhmann, Sebastian; Kontopodis, Evangelos; Mandarakas, Nikos; Romanopoulos, Stylianos; Skalidis, Raphael; Vervelaki, Anna; Borman, George; Kopatskaya, Evgenia; Larionova, Elena; Morozova, Daria; Savchenko, Sergey; Vasilyev, Andrey; Zhovtan, Alexey; Casadio, Carolina; Escudero, Juan; Kramer, Joana; Myserlis, Ioannis; Trainou, Efthalia; Imazawa, Ryo; Sasada, Mahito; Fukazawa, Yasushi; Kawabata, Koji; Uemura, Makoto; Mizuno, Tsunefumi; Nakaoka, Tatsuya; Akitaya, Hiroshi; Masiero, Joseph; Mawet, Dimitri; Panopoulou, Georgia; Tinyanont, Samaporn; Kagitani, Masato; Kravtsov, Vadim; Sakanoi, Takeshi; Dattolo, Matthew; Gurwell, Mark; Keating, Garrett; Rao, Ramprasad; Cheong, Whee; Jeong, Hyeon-Woo; Kang, Sincheol; Kim, Sang-Hyun; Lee, Sang-Sung; Angelakis, Emmanouil; Kraus, Alexander; Hales, Antonio; Kameno, Seiji; Kneissl, Ruediger; Messias, Hugo; Nagai, Hiroshi; Antonelli, Lucio; Bachetti, Matteo; Baldini, Luca; Baumgartner, Wayne; Bellazzini, Ronaldo; Bianchi, Stefano; Bongiorno, Stephen; Bonino, Raffaella; Brez, Alessandro; Bucciantini, Niccolò; Capitanio, Fiamma; Castellano, Simone; Chen, Chen-Ting; Ciprini, Stefano; Costa, Enrico; de Rosa, Alessandra; del Monte, Ettore; Di Marco, Alessandro; Doroshenko, Victor; Dovčiak, Michal; Ehlert, Steven; Enoto, Teruaki; Evangelista, Yuri; Fabiani, Sergio; Ferrazzoli, Riccardo; Garcia, Javier; Gunji, Shuichi; Hayashida, Kiyoshi; Heyl, Jeremy; Iwakiri, Wataru; Kaaret, Philip; Karas, Vladimir; Kislat, Fabian; Kitaguchi, Takao; Kolodziejczak, Jeffery; La Monaca, Fabio; Latronico, Luca; Maldera, Simone; Manfreda, Alberto; Marinucci, Andrea; Matt, Giorgio; Mitsuishi, Ikuyuki; Muleri, Fabio; Ng, C.-Y.; O’dell, Stephen; Oppedisano, Chiara; Papitto, Alessandro; Pavlov, George; Pesce-Rollins, Melissa; Petrucci, Pierre-Olivier; Pilia, Maura; Possenti, Andrea; Ramsey, Brian; Rankin, John; Ratheesh, Ajay; Roberts, Oliver; Romani, Roger; Sgrò, Carmelo; Slane, Patrick; Soffitta, Paolo; Spandre, Gloria; Swartz, Douglas; Tamagawa, Toru; Taverna, Roberto; Tawara, Yuzuru; Tennant, Allyn; Thomas, Nicholas; Tombesi, Francesco; Trois, Alessio; Tsygankov, Sergey; Turolla, Roberto; Vink, Jacco; Weisskopf, Martin; Wu, Kinwah; Xie, Fei; Zane, Silvia
Published in: The Astrophysical Journal, 2024, ISSN 2041-8213
Publisher: IOP Science
DOI: 10.3847/1538-4357/AD5671

Automating the detection of polarization angle rotations in blazars

Author(s): Anastasia Glykopoulou, Ioannis Liodakis, Dmitry Blinov
Published in: Astronomy & Astrophysics, Issue 710, 2026, ISSN 0004-6361
Publisher: EDP Sciences
DOI: 10.1051/0004-6361/202558360

Optical polarization properties of the closest tidal disruption event AT 2023clx indicate origin from tidal stream shocks

Author(s): Karri I I Koljonen, Kari Nilsson, Ioannis Liodakis, Elina Lindfors
Published in: Monthly Notices of the Royal Astronomical Society, Issue 542, 2025, ISSN 0035-8711
Publisher: Oxford University Press (OUP)
DOI: 10.1093/MNRAS/STAF1340

Determining the origin of the X-ray emission in blazars through multiwavelength polarization

Author(s): Ioannis Liodakis; Haocheng Zhang; Stella Boula; Riccardo Middei; Jorge Otero-Santos; Dmitry Blinov; Iván Agudo; Markus Böttcher; Chien-Ting Chen; Steven R. Ehlert; Svetlana G. Jorstad; Philip Kaaret; Henric Krawczynski; Abel L. Peirson; Roger W. Romani; Fabrizio Tavecchio; Martin C. Weisskopf; Pouya M. Kouch; Elina Lindfors; Kari Nilsson; Callum McCall; Helen E. Jermak; Iain A. Steele; Ioannis Myserlis; Mark Gurwell; Garrett K. Keating; Ramprasad Rao; Sincheol Kang; Sang-Sung Lee; Sanghyun Kim; Whee Yeon Cheong; Hyeon-Woo Jeong; Emmanouil Angelakis; Alexander Kraus; Francisco José Aceituno; Giacomo Bonnoli; Víctor Casanova; Juan Escudero; Beatriz Agís-González; Daniel Morcuende; Alfredo Sota; Rumen Bachev; Tatiana S. Grishina; Evgenia N. Kopatskaya; Elena G. Larionova; Daria A. Morozova; Sergey S. Savchenko; Ekaterina V. Shishkina; Ivan S. Troitskiy; Yulia V. Troitskaya; Andrey A. Vasilyev
Published in: Astronomy & Astrophysics, 2025, ISSN 1432-0746
Publisher: EDP Sciences
DOI: 10.13016/M21WVK-37OF

Polarization echoes from past nuclear activity in the quasi-periodic eruption source GSN 069

Author(s): B. Agís-González, D. Hutsemékers, I. Liodakis, S. Cazzoli, D. Sluse, G. Miniutti, I. Márquez, J. Masegosa, F. Marin, J. A. Acosta-Pulido, C. Ramos Almeida
Published in: Astronomy & Astrophysics, Issue 705, 2026, ISSN 0004-6361
Publisher: EDP Sciences
DOI: 10.1051/0004-6361/202557342

A Search for Supermassive Black Hole Binary Candidates in 46 yr Radio Light Curves of 83 Blazars

Author(s): B. Molina, P. Mróz, P. V. De la Parra, A. C. S. Readhead, T. Surti, M. F. Aller, J. D. Scargle, R. A. Reeves, H. Aller, M. C. Begelman, R. D. Blandford, Y. Ding, M. J. Graham, F. Harrison, T. Hovatta, I. Liodakis, M. L. Lister, W. Max-Moerbeck, V. Pavlidou, T. J. Pearson, V. Ravi, A. G. Sullivan, A. Synani, K. Tassis, S. E. Tremblay, J. A. Zensus
Published in: The Astrophysical Journal, Issue 1000, 2026, ISSN 0004-637X
Publisher: American Astronomical Society
DOI: 10.3847/1538-4357/AE3141

X-ray Polarization of Blazars and Radio Galaxies Measured by the Imaging X-ray Polarimetry Explorer

Author(s): Alan P. Marscher, Laura Di Gesu, Svetlana G. Jorstad, Dawoon E. Kim, Ioannis Liodakis, Riccardo Middei, Fabrizio Tavecchio
Published in: Galaxies, Issue 12, 2025, ISSN 2075-4434
Publisher: MDPI AG
DOI: 10.3390/GALAXIES12040050

Periodic Gamma-Ray Modulation of the Blazar PG 1553+113 Confirmed by Fermi-LAT and Multiwavelength Observations

Author(s): S. Abdollahi, L. Baldini, G. Barbiellini, R. Bellazzini, B. Berenji, E. Bissaldi, R. D. Blandford, R. Bonino, P. Bruel, S. Buson, R. A. Cameron, P. A. Caraveo, F. Casaburo, E. Cavazzuti, C. C. Cheung, G. Chiaro, S. Ciprini, G. Cozzolongo, P. Cristarella Orestano, S. Cutini, F. D’Ammando, N. Di Lalla, F. Dirirsa, L. Di Venere, A. Domínguez, S. J. Fegan, E. C. Ferrara, A. Fiori, Y. Fukazawa, S. Funk, P. Fusco, F. Gargano, S. Garrappa, D. Gasparrini, S. Germani, N. Giglietto, F. Giordano, M. Giroletti, D. Green, I. A. Grenier, S. Guiriec, E. Hays, D. Horan, M. Kuss, S. Larsson, M. Laurenti, J. Li, I. Liodakis, F. Longo, F. Loparco, B. Lott, M. N. Lovellette, P. Lubrano, S. Maldera, D. Malyshev, A. Manfreda, L. Marcotulli, G. Martí-Devesa, M. N. Mazziotta, I. Mereu, P. F. Michelson, W. Mitthumsiri, T. Mizuno, M. E. Monzani, A. Morselli, I. V. Moskalenko, M. Negro, N. Omodei, M. Orienti, E. Orlando, J. F. Ormes, D. Paneque, M. Perri, M. Persic, M. Pesce-Rollins, T. A. Porter, G. Principe, S. Rainò, R. Rando, B. Rani, M. Razzano, A. Reimer, O. Reimer, P. M. Saz Parkinson, L. Scotton, D. Serini, A. Sesana, C. Sgrò, E. J. Siskind, G. Spandre, P. Spinelli, D. J. Suson, H. Tajima, M. N. Takahashi, D. Tak, J. B. Thayer, D. J. Thompson, D. F. Torres, J. Valverde, F. Verrecchia, G. Zaharijas
Published in: The Astrophysical Journal, Issue 976, 2024, ISSN 0004-637X
Publisher: American Astronomical Society
DOI: 10.3847/1538-4357/AD64C5

Evidence of a toroidal magnetic field in the core of 3C 84

Author(s): G. F. Paraschos; L. C. Debbrecht; J. A. Kramer; E. Traianou; I. Liodakis; T. P. Krichbaum; J.-Y. Kim; M. Janssen; D. G. Nair; T. Savolainen; E. Ros; U. Bach; J. A. Hodgson; M. Lisakov; N. R. MacDonald; J. A. Zensus
Published in: Astronomy & Astrophysics, 2024, ISSN 1432-0746
Publisher: EDP Sciences
DOI: 10.48550/ARXIV.2405.00097

X-Ray Polarization of the High-synchrotron-peak BL Lacertae Object 1ES 1959+650 during Intermediate and High X-Ray Flux States

Author(s): Luigi Pacciani, Dawoon E. Kim, Riccardo Middei, Herman L. Marshall, Alan P. Marscher, Ioannis Liodakis, Iván Agudo, Svetlana G. Jorstad, Juri Poutanen, Manel Errando, Laura Di Gesu, Michela Negro, Fabrizio Tavecchio, Kinwah Wu, Chien-Ting Chen, Fabio Muleri, Lucio Angelo Antonelli, Immacolata Donnarumma, Steven R. Ehlert, Francesco Massaro, Stephen L. O’Dell, Matteo Perri, Simonetta Puccetti, Francisco José Aceituno, Giacomo Bonnoli, Víctor Casanova, Juan Escudero, Beatriz Agís-González, César Husillos, Daniel Morcuende, Jorge Otero-Santos, Alfredo Sota, Pouya M. Kouch, Elina Lindfors, George A. Borman, José L. Gómez, Evgenia N. Kopatskaya, Elena G. Larionova, Daria A. Morozova, Sergey S. Savchenko, Andrey A. Vasilyev, Alexey V. Zhovtan, Dmitry Blinov, Anastasia Gourni, Sebastian Kiehlmann, Angelos Kourtidis, Nikos Mandarakas, Efthymios Palaiologou, Nikolaos Triantafyllou, Anna Vervelaki, Ioannis Myserlis, Mark Gurwell, Garrett Keating, Ramprasad Rao, Emmanouil Angelakis, Alexander Kraus, Matteo Bachetti, Luca Baldini, Wayne H. Baumgartner, Ronaldo Bellazzini, Stefano Bianchi, Stephen D. Bongiorno, Raffaella Bonino, Alessandro Brez, Niccoló Bucciantini, Fiamma Capitanio, Simone Castellano, Elisabetta Cavazzuti, Stefano Ciprini, Enrico Costa, Alessandra De Rosa, Ettore Del Monte, Niccoló Di Lalla, Alessandro Di Marco, Victor Doroshenko, Michal Dovčiak, Teruaki Enoto, Yuri Evangelista, Sergio Fabiani, Riccardo Ferrazzoli, Javier A. Garcia, Shuichi Gunji, Kiyoshi Hayashida, Jeremy Heyl, Wataru Iwakiri, Philip Kaaret, Vladimir Karas, Fabian Kislat, Takao Kitaguchi, Jeffery J. Kolodziejczak, Henric Krawczynski, Fabio La Monaca, Luca Latronico, Simone Maldera, Alberto Manfreda, Frédéric Marin, Andrea Marinucci, Giorgio Matt, Ikuyuki Mitsuishi, Tsunefumi Mizuno, C.-Y. Ng, Nicola Omodei, Chiara Oppedisano, Alessandro Papitto, George G. Pavlov, Abel Lawrence Peirson, Melissa Pesce-Rollins, Pierre-Olivier Petrucci, Maura Pilia, Andrea Possenti, Brian D. Ramsey, John Rankin, Ajay Ratheesh, Oliver J. Roberts, Roger W. Romani, Carmelo Sgró, Patrick Slane, Paolo Soffitta, Gloria Spandre, Douglas A. Swartz, Toru Tamagawa, Roberto Taverna, Yuzuru Tawara, Allyn F. Tennant, Nicholas E. Thomas, Francesco Tombesi, Alessio Trois, Sergey S. Tsygankov, Roberto Turolla, Jacco Vink, Martin C. Weisskopf, Fei Xie, Silvia Zane
Published in: The Astrophysical Journal, Issue 983, 2025, ISSN 0004-637X
Publisher: American Astronomical Society
DOI: 10.3847/1538-4357/ADBBE2

Spectropolarimetry of NGC 1275 reveals a narrow-line radio galaxy with polarization parallel to its radio jet axis

Author(s): F. Marin, T. Pursimo, I. Liodakis, E. Lindfors, J. Biedermann, D. Hutsemékers, M. Turkki
Published in: Astronomy & Astrophysics, Issue 702, 2025, ISSN 0004-6361
Publisher: EDP Sciences
DOI: 10.1051/0004-6361/202556163

X-Ray and Multiwavelength Polarization of Mrk 501 from 2022 to 2023

Author(s): Chien-Ting J. Chen, Ioannis Liodakis, Riccardo Middei, Dawoon E. Kim, Laura Di Gesu, Alessandro Di Marco, Steven R. Ehlert, Manel Errando, Michela Negro, Svetlana G. Jorstad, Alan P. Marscher, Kinwah Wu, Iván Agudo, Juri Poutanen, Tsunefumi Mizuno, Pouya M. Kouch, Elina Lindfors, George A. Borman, Tatiana S. Grishina, Evgenia N. Kopatskaya, Elena G. Larionova, Daria A. Morozova, Sergey S. Savchenko, Ivan S. Troitsky, Yulia V. Troitskaya, Andrey A. Vasilyev, Alexey V. Zhovtan, Francisco José Aceituno, Giacomo Bonnoli, Víctor Casanova, Juan Escudero, Beatriz Agís-González, César Husillos, Jorge Otero Santos, Alfredo Sota, Vilppu Piirola, Ioannis Myserlis, Emmanouil Angelakis, Alexander Kraus, Mark Gurwell, Garrett Keating, Ramprasad Rao, Sincheol Kang, Sang-Sung Lee, Sang-Hyun Kim, Whee Yeon Cheong, Hyeon-Woo Jeong, Chanwoo Song, Andrei V. Berdyugin, Masato Kagitani, Vadim Kravtsov, Anagha P. Nitindala, Takeshi Sakanoi, Ryo Imazawa, Mahito Sasada, Yasushi Fukazawa, Koji S. Kawabata, Makoto Uemura, Tatsuya Nakaoka, Hiroshi Akitaya, Carolina Casadio, Albrecht Sievers, Lucio Angelo Antonelli, Matteo Bachetti, Luca Baldini, Wayne H. Baumgartner, Ronaldo Bellazzini, Stefano Bianchi, Stephen D. Bongiorno, Raffaella Bonino, Alessandro Brez, Niccoló Bucciantini, Fiamma Capitanio, Simone Castellano, Elisabetta Cavazzuti, Stefano Ciprini, Enrico Costa, Alessandra De Rosa, Ettore Del Monte, Niccoló Di Lalla, Immacolata Donnarumma, Victor Doroshenko, Michal Dovčiak, Teruaki Enoto, Yuri Evangelista, Sergio Fabiani, Riccardo Ferrazzoli, Javier A. Garcia, Shuichi Gunji, Kiyoshi Hayashida, Jeremy Heyl, Wataru Iwakiri, Philip Kaaret, Vladimir Karas, Fabian Kislat, Takao Kitaguchi, Jeffery J. Kolodziejczak, Henric Krawczynski, Fabio La Monaca, Luca Latronico, Simone Maldera, Alberto Manfreda, Frédéric Marin, Andrea Marinucci, Herman L. Marshall, Francesco Massaro, Giorgio Matt, Ikuyuki Mitsuishi, Fabio Muleri, C.-Y. Ng, Stephen L. O’Dell, Nicola Omodei, Chiara Oppedisano, Alessandro Papitto, George G. Pavlov, Abel Lawrence Peirson, Matteo Perri, Melissa Pesce-Rollins, Pierre-Olivier Petrucci, Maura Pilia, Andrea Possenti, Simonetta Puccetti, Brian D. Ramsey, John Rankin, Ajay Ratheesh, Oliver J. Roberts, Roger W. Romani, Carmelo Sgró, Patrick Slane, Paolo Soffitta, Gloria Spandre, Douglas A. Swartz, Toru Tamagawa, Fabrizio Tavecchio, Roberto Taverna, Yuzuru Tawara, Allyn F. Tennant, Nicholas E. Thomas, Francesco Tombesi, Alessio Trois, Sergey S. Tsygankov, Roberto Turolla, Jacco Vink, Martin C. Weisskopf, Fei Xie, Silvia Zane
Published in: The Astrophysical Journal, Issue 974, 2024, ISSN 0004-637X
Publisher: American Astronomical Society
DOI: 10.3847/1538-4357/AD63A1

Insights from the first flaring activity of a high synchrotron peaked blazar with X-ray polarization and VHE gamma rays

Author(s): MAGIC Collaboration; Abe, K.; Abe, S.; Abhir, J.; Abhishek, A.; Acciari, V. A.; Aguasca-Cabot, A.; Agudo, I.; Aniello, T.; Ansoldi, S.; Antonelli, L. A.; Engels, A. Arbet; Arcaro, C.; Asano, K.; Babić, A.; de Almeida, U. Barres; Barrio, J. A.; Barrios-Jiménez, L.; Batković, I.; Baxter, J.; González, J. Becerra; Bednarek, W.; Bernardini, E.; Bernete, J.; Berti, A.; Besenrieder, J.; Bigongiari, C.; Biland, A.; Blanch, O.; Bonnoli, G.; Bošnjak, Ž.; Bronzini, E.; Burelli, I.; Campoy-Ordaz, A.; Carosi, A.; Carosi, R.; Carretero-Castrillo, M.; Castro-Tirado, A. J.; Cerasole, D.; Ceribella, G.; Chai, Y.; Chilingarian, A.; Cifuentes, A.; Colombo, E.; Contreras, J. L.; Cortina, J.; Covino, S.; D'Ammando, F.; D'Amico, G.; Da Vela, P.; Dazzi, F.; De Angelis, A.; De Lotto, B.; de Menezes, R.; Delfino, M.; Delgado, J.; Mendez, C. Delgado; Di Pierro, F.; Di Tria, R.; Di Venere, L.; Dinesh, A.; Prester, D. Dominis; Donini, A.; Dorner, D.; Doro, M.; Eisenberger, L.; Elsaesser, D.; Escudero, J.; Fariña, L.; Foffano, L.; Font, L.; Fröse, S.; Fukazawa, Y.; López, R. J. García; Garczarczyk, M.; Gasparyan, S.; Gaug, M.; Paiva, J. G. Giesbrecht; Giglietto, N.; Giordano, F.; Gliwny, P.; Godinović, N.; Gradetzke, T.; Grau, R.; Green, D.; Green, J. G.; Günther, P.; Hadasch, D.; Hahn, A.; Hassan, T.; Heckmann, L.; Llorente, J. Herrera; Hrupec, D.; Imazawa, R.; Israyelyan, D.; Itokawa, T.; Martínez, I. Jiménez; Quiles, J. Jiménez; Jormanainen, J.; Kankkunen, S.; Kayanoki, T.; Kerszberg, D.; Khachatryan, M.; Kluge, G. W.; Kobayashi, Y.; Konrad, J.; Kouch, P. M.; Kubo, H.; Kushida, J.; Láinez, M.; Lamastra, A.; Lindfors, E.; Lombardi, S.; Longo, F.; López-Coto, R.; López-Moya, M.; López-Oramas, A.; Loporchio, S.; Lorini, A.; Lyard, E.; Majumdar, P.; Makariev, M.; Maneva, G.; Manganaro, M.; Mangano, S.; Mannheim, K.; Mariotti, M.; Martínez, M.; Maruševec, P.; Mas-Aguilar, A.; Mazin, D.; Menchiari, S.; Mender, S.; Miceli, D.; Miranda, J. M.; Mirzoyan, R.; González, M. Molero; Molina, E.; Mondal, H. A.; Moralejo, A.; Nakamori, T.; Nanci, C.; Neustroev, V.; Nickel, L.; Rosillo, M. Nievas; Nigro, C.; Nikolić, L.; Nilsson, K.; Nishijima, K.; Ekoume, T. Njoh; Noda, K.; Nozaki, S.; Okumura, A.; Paiano, S.; Paneque, D.; Paoletti, R.; Paredes, J. M.; Peresano, M.; Persic, M.; Pihet, M.; Pirola, G.; Podobnik, F.; Moroni, P. G. Prada; Prandini, E.; Principe, G.; Rhode, W.; Ribó, M.; Rico, J.; Righi, C.; Sahakyan, N.; Saito, T.; Saturni, F. G.; Schmuckermaier, F.; Schubert, J. L.; Sciaccaluga, A.; Silvestri, G.; Sitarek, J.; Sliusar, V.; Sobczynska, D.; Stamerra, A.; Strišković, J.; Strom, D.; Strzys, M.; Suda, Y.; Tajima, H.; Takahashi, M.; Takeishi, R.; Temnikov, P.; Terauchi, K.; Terzić, T.; Teshima, M.; Truzzi, S.; Tutone, A.; Ubach, S.; van Scherpenberg, J.; Ventura, S.; Verna, G.; Viale, I.; Vigliano, A.; Vigorito, C. F.
Published in: Astronomy & Astrophysics, 2025, ISSN 1432-0746
Publisher: EDP Sciences
DOI: 10.48550/ARXIV.2410.23140

X-Ray Polarimetric Observations of the Western Hotspot of Pictor A

Author(s): Stefano Tugliani, Francesco Massaro, Michela Negro, Raffaella Bonino, Nicolò Cibrario, Luca Latronico, Simone Maldera, Alessandro Paggi, Andrea Tramacere, Eileen T. Meyer, Ioannis Liodakis, Herman L. Marshall, Eric S. Perlman
Published in: The Astrophysical Journal Letters, Issue 985, 2025, ISSN 2041-8205
Publisher: American Astronomical Society
DOI: 10.3847/2041-8213/ADCDFE

Repeating flares, X-ray outbursts and delayed infrared emission: A comprehensive compilation of optical tidal disruption events

Author(s): D. A. Langis, I. Liodakis, K. I. I. Koljonen, A. Paggi, N. Globus, L. Wyrzykowski, P. J. Mikołajczyk, K. Kotysz, P. Zieliński, N. Ihanec, J. Ding, D. Morshed, Z. Torres
Published in: Astronomy & Astrophysics, Issue 707, 2026, ISSN 0004-6361
Publisher: EDP Sciences
DOI: 10.1051/0004-6361/202554882

Detectability of Polarized γ -Ray Emission from Blazar Flares with COSI

Author(s): Garrett A. Latiolais, Jorge Otero-Santos, Michela Negro, Lea Marcotulli, Mohammad Ali Boroumand, Savitri Gallego, Christopher M. Karwin, Israel Martinez-Castellanos, Daniel Kocevski, Marco Ajello, Sara Capecchiacci, Ioannis Liodakis, Srinadh R. Bhavanam, Steven E. Boggs, Dieter H. Hartmann, Carolyn A. Kierans, Tiffany R. Lewis, Alberto Sciaccaluga, John A. Tomsick, Haocheng Zhang, Andreas Zoglauer
Published in: The Astrophysical Journal, Issue 1004, 2026, ISSN 0004-637X
Publisher: American Astronomical Society
DOI: 10.3847/1538-4357/AE69D8

Wide area linear optical polarimeter control software

Author(s): John A. Kypriotakis, Bhushan Joshi, Dmitry Blinov, Sebastian Kiehlmann, Ramya M. Anche, Ioannis Liodakis, Myrto Falalaki, Tuhin Ghosh, Eirik Gjerløw, Siddharth Maharana, Nikolaos Mandarakas, Georgia V. Panopoulou, Katerina Papadaki, Vasiliki Pavlidou, Timothy J. Pearson, Vincent Pelgrims, Stephen B. Potter, Chaitanya V. Rajarshi, Anamparambu N. Ramaprakash, Anthony C. S. Readhead, Raphael Skalidis, Konstantinos Tassis
Published in: Journal of Astronomical Telescopes, Instruments, and Systems, Issue 11, 2025, ISSN 2329-4124
Publisher: SPIE-Intl Soc Optical Eng
DOI: 10.1117/1.JATIS.11.3.037001

Super-Eddington Accretion in Quasars

Author(s): Paola Marziani; Karla Garnica Luna; Alberto Floris; Ascensión del Olmo; Alice Deconto-Machado; Tania M. Buendia-Rios; C. Alenka Negrete; Deborah Dultzin
Published in: Universe, 2025, ISSN 2218-1997
Publisher: MDPI
DOI: 10.48550/ARXIV.2502.14713

Probing the statistical correlation of optical tidal disruption events with high-energy neutrinos

Author(s): D. A. Langis, I. Liodakis, K. I. I. Koljonen, P. M. Kouch
Published in: Astronomy & Astrophysics, Issue 709, 2026, ISSN 0004-6361
Publisher: EDP Sciences
DOI: 10.1051/0004-6361/202556514

3D interstellar medium structure challenges the Serkowski relation

Author(s): N. Mandarakas; K. Tassis; R. Skalidis
Published in: Astronomy & Astrophysics, 2025, ISSN 1432-0746
Publisher: EDP Sciences
DOI: 10.1051/0004-6361/202452263

Association of the IceCube neutrinos with blazars in the CGRaBS sample

Author(s): Pouya M. Kouch, Elina Lindfors, Talvikki Hovatta, Ioannis Liodakis, Karri I. I. Koljonen, Kari Nilsson, Sebastian Kiehlmann, Walter Max-Moerbeck, Anthony C. S. Readhead, Rodrigo A. Reeves, Timothy J. Pearson, Jenni Jormanainen, Vandad Fallah Ramazani, Matthew J. Graham
Published in: Astronomy & Astrophysics, Issue 690, 2024, ISSN 0004-6361
Publisher: EDP Sciences
DOI: 10.1051/0004-6361/202347624

First characterization of the emission behavior of Mrk 421 from radio to very high-energy gamma rays with simultaneous X-ray polarization measurements

Author(s): S. Abe, J. Abhir, V. A. Acciari, I. Agudo, T. Aniello, S. Ansoldi, L. A. Antonelli, A. Arbet-Engels, C. Arcaro, M. Artero, K. Asano, A. Babić, A. Baquero, U. Barres de Almeida, J. A. Barrio, I. Batković, J. Baxter, J. Becerra González, W. Bednarek, E. Bernardini, J. Bernete, A. Berti, J. Besenrieder, C. Bigongiari, A. Biland, O. Blanch, G. Bonnoli, Ž. Bošnjak, I. Burelli, G. Busetto, A. Campoy-Ordaz, A. Carosi, R. Carosi, M. Carretero-Castrillo, A. J. Castro-Tirado, G. Ceribella, Y. Chai, A. Cifuentes, S. Cikota, E. Colombo, J. L. Contreras, J. Cortina, S. Covino, F. D’Ammando, G. D’Amico, V. D’Elia, P. Da Vela, F. Dazzi, A. De Angelis, B. De Lotto, R. de Menezes, A. Del Popolo, J. Delgado, C. Delgado Mendez, F. Di Pierro, L. Di Venere, D. Dominis Prester, A. Donini, D. Dorner, M. Doro, D. Elsaesser, G. Emery, J. Escudero, L. Fariña, A. Fattorini, L. Foffano, L. Font, S. Fröse, S. Fukami, Y. Fukazawa, R. J. García López, M. Garczarczyk, S. Gasparyan, M. Gaug, J. G. Giesbrecht Paiva, N. Giglietto, F. Giordano, P. Gliwny, N. Godinović, T. Gradetzke, R. Grau, D. Green, J. G. Green, P. Günther, D. Hadasch, A. Hahn, T. Hassan, L. Heckmann, J. Herrera, D. Hrupec, M. Hütten, R. Imazawa, T. Inada, K. Ishio, I. Jiménez Martínez, J. Jormanainen, D. Kerszberg, G. W. Kluge, Y. Kobayashi, P. M. Kouch, H. Kubo, J. Kushida, M. Láinez Lezáun, A. Lamastra, F. Leone, E. Lindfors, L. Linhoff, S. Lombardi, F. Longo, R. López-Coto, M. López-Moya, A. López-Oramas, S. Loporchio, A. Lorini, B. Machado de Oliveira Fraga, P. Majumdar, M. Makariev, G. Maneva, N. Mang, M. Manganaro, S. Mangano, K. Mannheim, M. Mariotti, M. Martínez, M. Martínez-Chicharro, A. Mas-Aguilar, D. Mazin, S. Menchiari, S. Mender, D. Miceli, T. Miener, J. M. Miranda, R. Mirzoyan, M. Molero González, E. Molina, H. A. Mondal, A. Moralejo, D. Morcuende, T. Nakamori, C. Nanci, L. Nava, V. Neustroev, L. Nickel, M. Nievas Rosillo, C. Nigro, L. Nikolić, K. Nilsson, K. Nishijima, T. Njoh Ekoume, K. Noda, S. Nozaki, Y. Ohtani, A. Okumura, J. Otero-Santos, S. Paiano, M. Palatiello, D. Paneque, R. Paoletti, J. M. Paredes, D. Pavlović, M. Peresano, M. Persic, M. Pihet, G. Pirola, F. Podobnik, P. G. Prada Moroni, E. Prandini, G. Principe, C. Priyadarshi, W. Rhode, M. Ribó, J. Rico, C. Righi, N. Sahakyan, T. Saito, K. Satalecka, F. G. Saturni, B. Schleicher, K. Schmidt, F. Schmuckermaier, J. L. Schubert, T. Schweizer, A. Sciaccaluga, J. Sitarek, V. Sliusar, D. Sobczynska, A. Stamerra, J. Strišković, D. Strom, M. Strzys, Y. Suda, S. Suutarinen, H. Tajima, M. Takahashi, R. Takeishi, F. Tavecchio, P. Temnikov, K. Terauchi, T. Terzić, M. Teshima, L. Tosti, S. Truzzi, A. Tutone, S. Ubach, J. van Scherpenberg, M. Vazquez Acosta, S. Ventura, I. Viale, C. F. Vigorito, V. Vitale, I. Vovk, R. Walter, M. Will, C. Wunderlich, T. Yamamoto, I. Liodakis, S. G. Jorstad, L. Di Gesu, I. Donnarumma, D. E. Kim, A. P. Marscher, R. Middei, M. Perri, S. Puccetti, F. Verrecchia, C. Leto, I. De La Calle Pérez, E. Jiménez-Bailón, D. Blinov, I. G. Bourbah, S. Kiehlmann, E. Kontopodis, N. Mandarakas, R. Skalidis, A. Vervelaki, F. J. Aceituno, B. Agís-González, A. Sota, M. Sasada, Y. Fukazawa, K. S. Kawabata, M. Uemura, T. Mizuno, H. Akitaya, C. Casadio, I. Myserlis, A. Sievers, A. Lähteenmäki, I. Syrjärinne, M. Tornikoski, Q. Salomé, M. Gurwell, G. K. Keating, R. Rao
Published in: Astronomy & Astrophysics, Issue 684, 2024, ISSN 0004-6361
Publisher: EDP Sciences
DOI: 10.1051/0004-6361/202347988

Polarisation angle variability in tidal disruption events

Author(s): A. Floris, I. Liodakis, K. I. I. Koljonen, E. Lindfors, B. Agís-González, A. Paggi, D. Blinov, K. Nilsson, I. Agudo, P. Charalampopoulos, J. Escudero Pedrosa, V. Piirola
Published in: Astronomy & Astrophysics, Issue 707, 2026, ISSN 0004-6361
Publisher: EDP Sciences
DOI: 10.1051/0004-6361/202557658

Magnetic field properties inside the jet of Mrk 421

Author(s): Dawoon E. Kim, Laura Di Gesu, Ioannis Liodakis, Alan P. Marscher, Svetlana G. Jorstad, Riccardo Middei, Herman L. Marshall, Luigi Pacciani, Iván Agudo, Fabrizio Tavecchio, Nicoló Cibrario, Stefano Tugliani, Raffaella Bonino, Michela Negro, Simonetta Puccetti, Francesco Tombesi, Enrico Costa, Immacolata Donnarumma, Paolo Soffitta, Tsunefumi Mizuno, Yasushi Fukazawa, Koji S. Kawabata, Tatsuya Nakaoka, Makoto Uemura, Ryo Imazawa, Mahito Sasada, Hiroshi Akitaya, Francisco Josè Aceituno, Giacomo Bonnoli, Vìctor Casanova, Ioannis Myserlis, Albrecht Sievers, Emmanouil Angelakis, Alexander Kraus, Whee Yeon Cheong, Hyeon-Woo Jeong, Sincheol Kang, Sang-Hyun Kim, Sang-Sung Lee, Beatriz Agìs-Gonzàlez, Alfredo Sota, Juan Escudero, Mark Gurwell, Garrett K. Keating, Ramprasad Rao, Pouya M. Kouch, Elina Lindfors, Ioakeim G. Bourbah, Sebastian Kiehlmann, Evangelos Kontopodis, Nikos Mandarakas, Stylianos Romanopoulos, Raphael Skalidis, Anna Vervelaki, Sergey S. Savchenko, Lucio A. Antonelli, Matteo Bachetti, Luca Baldini, Wayne H. Baumgartner, Ronaldo Bellazzini, Stefano Bianchi, Stephen D. Bongiorno, Alessandro Brez, Niccoló Bucciantini, Fiamma Capitanio, Simone Castellano, Elisabetta Cavazzuti, Chien-Ting Chen, Stefano Ciprini, Alessandra De Rosa, Ettore Del Monte, Niccoló Di Lalla, Alessandro Di Marco, Victor Doroshenko, Michal Dovčiak, Steven R. Ehlert, Teruaki Enoto, Yuri Evangelista, Sergio Fabiani, Riccardo Ferrazzoli, Javier A. Garcia, Shuichi Gunji, Kiyoshi Hayashida, Jeremy Heyl, Wataru Iwakiri, Philip Kaaret, Vladimir Karas, Fabian Kislat, Takao Kitaguchi, Jeffery J. Kolodziejczak, Henric Krawczynski, Fabio La Monaca, Luca Latronico, Simone Maldera, Alberto Manfreda, Frédéric Marin, Andrea Marinucci, Francesco Massaro, Giorgio Matt, Ikuyuki Mitsuishi, Fabio Muleri, C.-Y. Ng, Stephen L. O’Dell, Nicola Omodei, Chiara Oppedisano, Alessandro Papitto, George G. Pavlov, Abel L. Peirson, Matteo Perri, Melissa Pesce-Rollins, Pierre-Olivier Petrucci, Maura Pilia, Andrea Possenti, Juri Poutanen, Brian D. Ramsey, John Rankin, Ajay Ratheesh, Oliver Roberts, Roger W. Romani, Carmelo Sgró, Patrick Slane, Gloria Spandre, Doug Swartz, Toru Tamagawa, Roberto Taverna, Yuzuru Tawara, Allyn F. Tennant, Nicholas E. Thomas, Alessio Trois, Sergey S. Tsygankov, Roberto Turolla, Jacco Vink, Martin C. Weisskopf, Kinwah Wu, Fei Xie, Silvia Zane
Published in: Astronomy & Astrophysics, Issue 681, 2024, ISSN 0004-6361
Publisher: EDP Sciences
DOI: 10.1051/0004-6361/202347408

Systems design, assembly, integration, and lab testing of WALOP-South Polarimeter

Author(s): Maharana, Siddharth; Ramaprakash, A. N.; Rajarshi, Chaitanya; Khodade, Pravin; Joshi, Bhushan; Chordia, Pravin; Kohok, Abhay; Anche, Ramya M.; Modi, Deepa; Kypriotakis, John A.; Deokar, Amit; Kinjawadekar, Aditya; Potter, Stephen B.; Blinov, Dmitry; Eriksen, Hans Kristian; Falalaki, Myrto; Gajjar, Hitesh; Ghosh, Tuhin; Gjerløw, Eirik; Kiehlmann, Sebastain; Liodakis, Ioannis; Mandarakas, Nikolaos; Panopoulou, Georgia V.; Pavlidou, Vasiliki; Pearson, Timothy J.; Pelgrims, Vincent; Readhead, Anthony C. S.; Skalidis, Raphael; Tassis, Konstantinos; Uppal, Namita; Wehus, Ingunn K.
Published in: Ground-based and Airborne Instrumentation for Astronomy X, 2024, ISSN 1996-756X
Publisher: SPIE
DOI: 10.48550/ARXIV.2406.19428

The extreme coronal line emitter AT 2022fpx: varying optical polarization properties and late-time X-ray flare

Author(s): Karri I I Koljonen; Ioannis Liodakis; Elina Lindfors; Kari Nilsson; Thomas M Reynolds; Panos Charalampopoulos; Konstantinos Kouroumpatzakis; Callum McCall; Helen E Jermak; Iain A Steele; Juan Carbajo-Hijarrubia
Published in: Monthly Notices of the Royal Astronomical Society, 2024, ISSN 1365-2966
Publisher: Oxford University Press
DOI: 10.48550/ARXIV.2403.04877

IXPE observation of the low-synchrotron peaked blazar S4 0954+65 during an optical-X-ray flare

Author(s): Pouya M. Kouch; Ioannis Liodakis; Francesco Fenu; Haocheng Zhang; Stella Boula; Riccardo Middei; Laura Di Gesu; Georgios F. Paraschos; Iván Agudo; Svetlana G. Jorstad; Elina Lindfors; Alan P. Marscher; Henric Krawczynski; Michela Negro; Kun Hu; Dawoon E. Kim; Elisabetta Cavazzuti; Manel Errando; Dmitry Blinov; Anastasia Gourni; Sebastian Kiehlmann; Angelos Kourtidis; Nikos Mandarakas; Nikolaos Triantafyllou; Anna Vervelaki; George A. Borman; Evgenia N. Kopatskaya; Elena G. Larionova; Daria A. Morozova; Sergey S. Savchenko; Andrey A. Vasilyev; Ivan S. Troitskiy; Tatiana S. Grishina; Ekaterina V. Shishkina; Alexey V. Zhovtan; Francisco José Aceituno; Giacomo Bonnoli; Víctor Casanova; Juan Escudero; Beatriz Agís-González; César Husillos; Jorge Otero-Santos; Vilppu Piirola; Alfredo Sota; Ioannis Myserlis; Mark Gurwell; Garrett K. Keating; Ramprasad Rao; Emmanouil Angelakis; Alexander Kraus; Lucio Angelo Antonelli; Matteo Bachetti; Luca Baldini; Wayne H. Baumgartner; Ronaldo Bellazzini; Stefano Bianchi; Stephen D. Bongiorno; Raffaella Bonino; Alessandro Brez; Niccolò Bucciantini; Fiamma Capitanio; Simone Castellano; Chien-Ting Chen; Stefano Ciprini; Enrico Costa; Alessandra De Rosa; Ettore Del Monte; Niccolò Di Lalla; Alessandro Di Marco; Immacolata Donnarumma; Victor Doroshenko; Michal Dovčiak; Steven R. Ehlert; Teruaki Enoto; Yuri Evangelista; Sergio Fabiani; Riccardo Ferrazzoli; Javier A. Garcia; Shuichi Gunji; Kiyoshi Hayashida; Jeremy Heyl; Wataru Iwakiri; Philip Kaaret; Vladimir Karas; Fabian Kislat; Takao Kitaguchi; Jeffery J. Kolodziejczak; Fabio La Monaca; Luca Latronico; Simone Maldera; Alberto Manfreda; Frédéric Marin; Andrea Marinucci; Herman L. Marshall; Francesco Massaro; Giorgio Matt; Ikuyuki Mitsuishi; Tsunefumi Mizuno; Fabio Muleri; Chi-Yung Ng; Stephen L. O’Dell; Nicola Omodei; Chiara Oppedisano; Alessandro Papitto; George G. Pavlov; Abel Lawrence Peirson; Matteo Perri; Melissa Pesce-Rollins; Pierre-Olivier Petrucci; Maura Pilia; Andrea Possenti; Juri Poutanen; Simonetta Puccetti; Brian D. Ramsey; John Rankin; Ajay Ratheesh; Oliver J. Roberts; Carmelo Sgrò; Patrick Slane; Paolo Soffitta; Gloria Spandre; Douglas A. Swartz; Toru Tamagawa; Fabrizio Tavecchio; Roberto Taverna; Yuzuru Tawara; Allyn F. Tennant; Nicholas E. Thomas; Francesco Tombesi; Alessio Trois; Sergey S. Tsygankov; Roberto Turolla; Roger W. Romani; Jacco Vink; Martin C. Weisskopf; Kinwah Wu; Fei Xie; Silvia Zane
Published in: Astronomy & Astrophysics, 2025, ISSN 1432-0746
Publisher: EDP Sciences
DOI: 10.48550/ARXIV.2411.16868

Detection of X-Ray Polarization from the Blazar 1ES 1959+650 with the Imaging X-Ray Polarimetry Explorer

Author(s): Manel Errando, Ioannis Liodakis, Alan P. Marscher, Herman L. Marshall, Riccardo Middei, Michela Negro, Abel Lawrence Peirson, Matteo Perri, Simonetta Puccetti, Pazit L. Rabinowitz, Iván Agudo, Svetlana G. Jorstad, Sergey S. Savchenko, Dmitry Blinov, Ioakeim G. Bourbah, Sebastian Kiehlmann, Evangelos Kontopodis, Nikos Mandarakas, Stylianos Romanopoulos, Raphael Skalidis, Anna Vervelaki, Francisco José Aceituno, Maria I. Bernardos, Giacomo Bonnoli, Víctor Casanova, Beatriz Agís-González, César Husillos, Alessandro Marchini, Alfredo Sota, Pouya M. Kouch, Elina Lindfors, Carolina Casadio, Juan Escudero, Ioannis Myserlis, Ryo Imazawa, Mahito Sasada, Yasushi Fukazawa, Koji S. Kawabata, Makoto Uemura, Tsunefumi Mizuno, Tatsuya Nakaoka, Hiroshi Akitaya, Mark Gurwell, Garrett K. Keating, Ramprasad Rao, Adam Ingram, Francesco Massaro, Lucio Angelo Antonelli, Raffaella Bonino, Elisabetta Cavazzuti, Chien-Ting Chen, Nicolò Cibrario, Stefano Ciprini, Alessandra De Rosa, Laura Di Gesu, Federico Di Pierro, Immacolata Donnarumma, Steven R. Ehlert, Francesco Fenu, Ephraim Gau, Vladimir Karas, Dawoon E. Kim, Henric Krawczynski, Marco Laurenti, Lindsey Lisalda, Rubén López-Coto, Grzegorz Madejski, Frédéric Marin, Andrea Marinucci, Ikuyuki Mitsuishi, Fabio Muleri, Luigi Pacciani, Alessandro Paggi, Pierre-Olivier Petrucci, Nicole Rodriguez Cavero, Roger W. Romani, Fabrizio Tavecchio, Stefano Tugliani, Kinwah Wu, Matteo Bachetti, Luca Baldini, Wayne H. Baumgartner, Ronaldo Bellazzini, Stefano Bianchi, Stephen D. Bongiorno, Alessandro Brez, Niccolò Bucciantini, Fiamma Capitanio, Simone Castellano, Enrico Costa, Ettore Del Monte, Niccolò Di Lalla, Alessandro Di Marco, Victor Doroshenko, Michal Dovčiak, Teruaki Enoto, Yuri Evangelista, Sergio Fabiani, Riccardo Ferrazzoli, Javier A. Garcia, Shuichi Gunji, Kiyoshi Hayashida, Jeremy Heyl, Wataru Iwakiri, Philip Kaaret, Fabian Kislat, Takao Kitaguchi, Jeffery J. Kolodziejczak, Fabio La Monaca, Luca Latronico, Simone Maldera, Alberto Manfreda, Giorgio Matt, C.-Y. Ng, Stephen L. O’Dell, Nicola Omodei, Chiara Oppedisano, Alessandro Papitto, George G. Pavlov, Melissa Pesce-Rollins, Maura Pilia, Andrea Possenti, Juri Poutanen, Brian D. Ramsey, John Rankin, Ajay Ratheesh, Oliver J. Roberts, Carmelo Sgrò, Patrick Slane, Paolo Soffitta, Gloria Spandre, Douglas A. Swartz, Toru Tamagawa, Roberto Taverna, Yuzuru Tawara, Allyn F. Tennant, Nicholas E. Thomas, Francesco Tombesi, Alessio Trois, Sergey S. Tsygankov, Roberto Turolla, Jacco Vink, Martin C. Weisskopf, Fei Xie, Silvia Zane
Published in: The Astrophysical Journal, Issue 963, 2024, ISSN 0004-637X
Publisher: American Astronomical Society
DOI: 10.3847/1538-4357/AD1CE4

Lost in the curve: Investigating the disappearing knots in blazar 3C 454.3

Author(s): Efthalia Traianou, Thomas P. Krichbaum, José L. Gómez, Rocco Lico, Georgios Filippos Paraschos, Ilje Cho, Eduardo Ros, Guang-Yao Zhao, Ioannis Liodakis, Rohan Dahale, Teresa Toscano, Antonio Fuentes, Marianna Foschi, Carolina Casadio, Nicholas MacDonald, Jae-Young Kim, Olivier Hervet, Svetlana Jorstad, Andrei P. Lobanov, Jeffrey Hodgson, Ioannis Myserlis, Ivan Agudo, Anton J. Zensus, Alan P. Marscher
Published in: Astronomy & Astrophysics, Issue 682, 2024, ISSN 0004-6361
Publisher: EDP Sciences
DOI: 10.1051/0004-6361/202347267

Polarization echoes from past nuclear activity in the quasi-periodic eruption source GSN 069

Testing particle acceleration in blazar jets with continuous high-cadence optical polarization observations

Author(s): Ioannis Liodakis; Sebastian Kiehlmann; Alan P. Marscher; Haocheng Zhang; Dmitry Blinov; Svetlana G. Jorstad; Iván Agudo; Erika Benítez; Andrei Berdyugin; Giacomo Bonnoli; Carolina Casadio; Chien-Ting Chen; Wen-Ping Chen; Steven R. Ehlert; Juan Escudero; Tatiana S. Grishina; David Hiriart; Angela Hsu; Ryo Imazawa; Helen E. Jermak; Jincen Jose; Philip Kaaret; Evgenia N. Kopatskaya; Bhavana Lalchand; Elena G. Larionova; Elina Lindfors; José M. López; Callum McCall; Daria A. Morozova; Efthymios Palaiologou; Shivangi Pandey; Juri Poutanen; Suvendu Rakshit; Pablo Reig; Mahito Sasada; Sergey S. Savchenko; Elena Shablovinskaya; Sharma Neha; Manisha Shrestha; Iain A. Steele; Ivan S. Troitskiy; Yulia V. Troitskaya; Makoto Uemura; Andrey A. Vasilyev; Zachary Weaver; Klaas Wiersema; Martin C. Weisskopf
Published in: Astronomy & Astrophysics, 2024, ISSN 1432-0746
Publisher: EDP Sciences
DOI: 10.48550/ARXIV.2406.15554

Super-Eddington Accretion Geometry: A Remarkable Stability of the Hidden Ultraluminous X-Ray Source Cygnus X-3

Author(s): Romana Mikušincová, Alexandra Veledina, Fabio Muleri, Raul Ciancarella, Andrzej Zdziarski, David A. Green, Michael McCollough, Henric Krawczynski, James F. Steiner, Michal Dovčiak, Varpu Ahlberg, Stefano Bianchi, Alessandro Di Marco, Javier A. García, Adam Ingram, Philip Kaaret, Timothy Kallman, Hu Kun, Fabio La Monaca, Alexander Lange, Vladislav Loktev, Guglielmo Mastroserio, Giorgio Matt, Razieh Emami, Pierre-Olivier Petrucci, Jakub Podgorný, Juri Poutanen, Ajay Ratheesh, Nicole Rodriguez, Jiří Svoboda, Francesco Tombesi, Francesco Ursini, Iván Agudo, Lucio A. Antonelli, Matteo Bachetti, Luca Baldini, Wayne H. Baumgartner, Ronaldo Bellazzini, Stephen D. Bongiorno, Raffaella Bonino, Alessandro Brez, Niccolò Bucciantini, Fiamma Capitanio, Simone Castellano, Elisabetta Cavazzuti, Chien-Ting Chen, Stefano Ciprini, Enrico Costa, Alessandra De Rosa, Ettore Del Monte, Laura Di Gesu, Niccolò Di Lalla, Immacolata Donnarumma, Victor Doroshenko, Steven R. Ehlert, Teruaki Enoto, Yuri Evangelista, Sergio Fabiani, Riccardo Ferrazzoli, Shuichi Gunji, Kiyoshi Hayashida, Jeremy Heyl, Wataru Iwakiri, Svetlana G. Jorstad, Vladimir Karas, Fabian Kislat, Takao Kitaguchi, Jeffery J. Kolodziejczak, Luca Latronico, Ioannis Liodakis, Simone Maldera, Alberto Manfreda, Frédéric Marin, Andrea Marinucci, Alan P. Marscher, Herman L. Marshall, Francesco Massaro, Ikuyuki Mitsuishi, Tsunefumi Mizuno, Michela Negro, Chi- Yung Ng, Stephen L. O’Dell, Nicola Omodei, Chiara Oppedisano, Alessandro Papitto, George G. Pavlov, Abel L. Peirson, Matteo Perri, Melissa Pesce-Rollins, Maura Pilia, Andrea Possenti, Simonetta Puccetti, Brian D. Ramsey, John Rankin, Oliver J. Roberts, Roger W. Romani, Carmelo Sgrò, Patrick Slane, Paolo Soffitta, Gloria Spandre, Douglas A. Swartz, Toru Tamagawa, Fabrizio Tavecchio, Roberto Taverna, Yuzuru Tawara, Allyn F. Tennant, Nicholas E. Thomas, Alessio Trois, Sergey S. Tsygankov, Roberto Turolla, Jacco Vink, Martin C. Weisskopf, Kinwah Wu, Fei Xie, Silvia Zane
Published in: The Astrophysical Journal, Issue 1005, 2026, ISSN 0004-637X
Publisher: American Astronomical Society
DOI: 10.3847/1538-4357/AE7366

Spectral Energy Distribution Variability of the Blazar OJ 287 During 2009–2021

Author(s): Wenwen Zuo; Alok C. Gupta; Minfeng Gu; Mauri J. Valtonen; Svetlana G. Jorstad; Margo F. Aller; Anne Lähteenmäki; Sebastian Kiehlmann; Pankaj Kushwaha; Hugh D. Aller; Liang Chen; Anthony C. S. Readhead; Merja Tornikoski; Qi Yuan
Published in: The Astrophysical Journal, 2025, ISSN 2041-8213
Publisher: IOP Science
DOI: 10.48550/ARXIV.2412.10752

IXPE Observations of the Blazar Mrk 501 in 2022: A Multiwavelength View

Author(s): L Lisalda, E Gau, H Krawczynski, F Tavecchio, I Liodakis, A Gokus, N Rodriguez Cavero, M Nowak, M Negro, R Middei, M Perri, S Puccetti, S G Jorstad, I Agudo, A P Marscher, B Ag’is-Gonz’alez, A V Berdyugin, M I Bernardos, D Blinov, G Bonnoli, G A Borman, I G Bourbah, C Casadio, V Casanova, A J Castro-Tirado, E Fern’andez-Garc’ia, M Garc’ia-Comas, T S Grishina, P Hakala, T Hovatta, Y D Hu, C Husillos, J Escudero, J Jormanainen, F Jos’e Aceituno, M Kagitani, S Kiehlmann, E Kontopodis, E N Kopatskaya, P M Kouch, V Kravtsov, A L”ahteenm”aki, E G Larionova, E Lindfors, N Mandarakas, A Marchini, J R Masiero, D Mawet, W Max-Moerbeck, D A Morozova, I Myserlis, K Nilsson, G V Panopoulou, T J Pearson, A C S Readhead, R Reeves, S Romanopoulos, T Sakanoi, Q Salom’e, S S Savchenko, R Skalidis, A Sota, I Syrj”arinne, S Tinyanont, M Tornikoski, Yu V Troitskaya, I S Troitskiy, A A Vasilyev, A Vervelaki, A V Zhovtan, L A Antonelli, M Bachetti, L Baldini, W H Baumgartner, R Bellazzini, S Bianchi, S D Bongiorno, R Bonino, A Brez, N Bucciantini, F Capitanio, S Castellano, E Cavazzuti, C Chen, S Ciprini, E Costa, A De Rosa, E Del Monte, L Di Gesu, N Di Lalla, A Di Marco, I Donnarumma, V Doroshenko, M Dovčiak, S R Ehlert, T Enoto, Y Evangelista, S Fabiani, R Ferrazzoli, J A Garcia, S Gunji, Mark Gurwell, K Hayashida, J Heyl, W Iwakiri, P Kaaret, V Karas, Garrett Keating, F Kislat, T Kitaguchi, J J Kolodziejczak, F La Monaca, L Latronico, S Maldera, A Manfreda, F Marin, A Marinucci, H L Marshall, F Massaro, G Matt, I Mitsuishi, T Mizuno, F Muleri, C Ng, S L O’Dell, N Omodei, C Oppedisano, A Papitto, G G Pavlov, A L Peirson, M Pesce-Rollins, P Petrucci, M Pilia, A Possenti, J Poutanen, B D Ramsey, J Rankin, R Rao, A Ratheesh, O J Roberts, R W Romani, C Sgrò, P Slane, P Soffitta, G Spandre, D A Swartz, T Tamagawa, R Taverna, Y Tawara, A F Tennant, N E Thomas, F Tombesi, A Trois, S S Tsygankov, R Turolla, J Vink, M C Weisskopf, K Wu, F Xie, S Zane
Published in: Monthly Notices of the Royal Astronomical Society, 2025, ISSN 0035-8711
Publisher: Oxford University Press (OUP)
DOI: 10.1093/MNRAS/STAF1122

CAZ catalog and optical light curves of 7918 blazar-selected active galactic nuclei

Author(s): Pouya M. Kouch, Elina Lindfors, Talvikki Hovatta, Ioannis Liodakis, Karri I. I. Koljonen, Alessandro Paggi, Kari Nilsson, Jenni Jormanainen, Vandad Fallah Ramazani, Sofia Kankkunen, Folkert Wierda, Sarah M. Wagner, Matthew J. Graham
Published in: Astronomy & Astrophysics, Issue 708, 2026, ISSN 0004-6361
Publisher: EDP Sciences
DOI: 10.1051/0004-6361/202557582

Time-dependent modelling of short-term variability in the TeV-blazar VER J0521+211 during the major flare in 2020

Author(s): null null, S. Abe, J. Abhir, A. Abhishek, V. A. Acciari, A. Aguasca-Cabot, I. Agudo, T. Aniello, S. Ansoldi, L. A. Antonelli, A. Arbet Engels, C. Arcaro, M. Artero, K. Asano, D. Baack, A. Babić, U. Barres de Almeida, J. A. Barrio, I. Batković, A. Bautista, J. Baxter, J. Becerra González, W. Bednarek, E. Bernardini, J. Bernete, A. Berti, J. Besenrieder, C. Bigongiari, A. Biland, O. Blanch, G. Bonnoli, Ž. Bošnjak, E. Bronzini, I. Burelli, A. Campoy-Ordaz, A. Carosi, R. Carosi, M. Carretero-Castrillo, A. J. Castro-Tirado, D. Cerasole, G. Ceribella, Y. Chai, A. Cifuentes, E. Colombo, J. L. Contreras, J. Cortina, S. Covino, G. D’Amico, V. D’Elia, P. Da Vela, F. Dazzi, A. De Angelis, B. De Lotto, R. de Menezes, M. Delfino, J. Delgado, C. Delgado Mendez, F. Di Pierro, R. Di Tria, L. Di Venere, D. Dominis Prester, A. Donini, D. Dorner, M. Doro, L. Eisenberger, D. Elsaesser, J. Escudero, L. Fariña, A. Fattorini, L. Foffano, L. Font, S. Fröse, S. Fukami, Y. Fukazawa, R. J. García López, M. Garczarczyk, S. Gasparyan, M. Gaug, J. G. Giesbrecht Paiva, N. Giglietto, F. Giordano, P. Gliwny, T. Gradetzke, R. Grau, D. Green, J. G. Green, P. Günther, D. Hadasch, A. Hahn, T. Hassan, L. Heckmann, J. Herrera Llorente, D. Hrupec, R. Imazawa, K. Ishio, I. Jiménez Martínez, J. Jormanainen, S. Kankkunen, T. Kayanoki, D. Kerszberg, G. W. Kluge, Y. Kobayashi, P. M. Kouch, H. Kubo, J. Kushida, M. Láinez, A. Lamastra, F. Leone, E. Lindfors, S. Lombardi, F. Longo, R. López-Coto, M. López-Moya, A. López-Oramas, S. Loporchio, A. Lorini, E. Lyard, B. Machado de Oliveira Fraga, P. Majumdar, M. Makariev, G. Maneva, M. Manganaro, S. Mangano, K. Mannheim, M. Mariotti, M. Martínez, M. Martínez-Chicharro, A. Mas-Aguilar, D. Mazin, S. Menchiari, S. Mender, D. Miceli, T. Miener, J. M. Miranda, R. Mirzoyan, M. Molero González, E. Molina, H. A. Mondal, A. Moralejo, D. Morcuende, T. Nakamori, C. Nanci, V. Neustroev, L. Nickel, M. Nievas Rosillo, C. Nigro, L. Nikolić, K. Nilsson, K. Nishijima, T. Njoh Ekoume, K. Noda, S. Nozaki, Y. Ohtani, A. Okumura, J. Otero-Santos, S. Paiano, D. Paneque, R. Paoletti, J. M. Paredes, M. Peresano, M. Persic, M. Pihet, G. Pirola, F. Podobnik, P. G. Prada Moroni, E. Prandini, G. Principe, W. Rhode, M. Ribó, J. Rico, C. Righi, N. Sahakyan, T. Saito, F. G. Saturni, K. Schmidt, F. Schmuckermaier, J. L. Schubert, T. Schweizer, A. Sciaccaluga, G. Silvestri, J. Sitarek, V. Sliusar, D. Sobczynska, A. Spolon, A. Stamerra, J. Strišković, D. Strom, M. Strzys, Y. Suda, H. Tajima, M. Takahashi, R. Takeishi, P. Temnikov, K. Terauchi, T. Terzić, M. Teshima, S. Truzzi, A. Tutone, S. Ubach, J. van Scherpenberg, M. Vazquez Acosta, S. Ventura, G. Verna, I. Viale, C. F. Vigorito, V. Vitale, I. Vovk, R. Walter, F. Wersig, M. Will, C. Wunderlich, T. Yamamoto, null null, R. Bachev, V. Fallah Ramazani, A. V. Filippenko, T. Hovatta, S. G. Jorstad, S. Kiehlmann, A. Lähteenmäki, I. Liodakis, A. P. Marscher, W. Max-Moerbeck, A. Omeliukh, T. Pursimo, A. C. S. Readhead, X. Rodrigues, M. Tornikoski, F. Wierda, W. Zheng
Published in: Astronomy & Astrophysics, Issue 694, 2025, ISSN 0004-6361
Publisher: EDP Sciences
DOI: 10.1051/0004-6361/202451378

High Optical-to-X-Ray Polarization Ratio Reveals Compton Scattering in BL Lacertae’s Jet

Author(s): Agudo, Iván; Liodakis, Ioannis; Otero-Santos, Jorge; Middei, Riccardo; Marscher, Alan; Jorstad, Svetlana; Zhang, Haocheng; Li, Hui; Di Gesu, Laura; Romani, Roger; Kim, Dawoon; Fenu, Francesco; Marshall, Herman; Pacciani, Luigi; Pedrosa, Juan; Aceituno, Francisco; Agís-González, Beatriz; Bonnoli, Giacomo; Casanova, Víctor; Morcuende, Daniel; Piirola, Vilppu; Sota, Alfredo; Kouch, Pouya; Lindfors, Elina; Mccall, Callum; Jermak, Helen; Steele, Iain; Borman, George; Grishina, Tatiana; Hagen-Thorn, Vladimir; Kopatskaya, Evgenia; Larionova, Elena; Morozova, Daria; Savchenko, Sergey; Shishkina, Ekaterina; Troitskiy, Ivan; Troitskaya, Yulia; Vasilyev, Andrey; Zhovtan, Alexey; Myserlis, Ioannis; Gurwell, Mark; Keating, Garrett; Rao, Ramprasad; Kang, Sincheol; Lee, Sang-Sung; Kim, Sanghyun; Cheong, Whee; Jeong, Hyeon-Woo; Angelakis, Emmanouil; Kraus, Alexander; Blinov, Dmitry; Maharana, Siddharth; Bachev, Rumen; Jormanainen, Jenni; Nilsson, Kari; Fallah Ramazani, Vandad; Casadio, Carolina; Fuentes, Antonio; Traianou, Efthalia; Thum, Clemens; Gómez, José; Antonelli, Lucio; Bachetti, Matteo; Baldini, Luca; Baumgartner, Wayne; Bellazzini, Ronaldo; Bianchi, Stefano; Bongiorno, Stephen; Bonino, Raffaella; Brez, Alessandro; Bucciantini, Niccolò; Capitanio, Fiamma; Castellano, Simone; Cavazzuti, Elisabetta; Chen, Chien-Ting; Ciprini, Stefano; Costa, Enrico; de Rosa, Alessandra; del Monte, Ettore; Di Lalla, Niccolò; Di Marco, Alessandro; Donnarumma, Immacolata; Doroshenko, Victor; Dovčiak, Michal; Ehlert, Steven; Enoto, Teruaki; Evangelista, Yuri; Fabiani, Sergio; Ferrazzoli, Riccardo; García, Javier; Gunji, Shuichi; Hayashida, Kiyoshi; Heyl, Jeremy; Iwakiri, Wataru; Kaaret, Philip; Karas, Vladimir; Kislat, Fabian; Kitaguchi, Takao; Kolodziejczak, Jeffery; Krawczynski, Henric; La Monaca, Fabio; Latronico, Luca; Maldera, Simone; Manfreda, Alberto; Marin, Frédéric; Marinucci, Andrea; Massaro, Francesco; Matt, Giorgio; Mitsuishi, Ikuyuki; Mizuno, Tsunefumi; Muleri, Fabio; Negro, Michela; Ng, Chi-Yung; O’dell, Stephen; Omodei, Nicola; Oppedisano, Chiara; Papitto, Alessandro; Pavlov, George; Peirson, Abel; Perri, Matteo; Pesce-Rollins, Melissa; Petrucci, Pierre-Olivier; Pilia, Maura; Possenti, Andrea; Poutanen, Juri; Puccetti, Simonetta; Ramsey, Brian; Rankin, John; Ratheesh, Ajay; Roberts, Oliver; Sgrò, Carmelo; Slane, Patrick; Soffitta, Paolo; Spandre, Gloria; Swartz, Douglas; Tamagawa, Toru; Tavecchio, Fabrizio; Taverna, Roberto; Tawara, Yuzuru; Tennant, Allyn; Thomas, Nicholas; Tombesi, Francesco; Trois, Alessio; Tsygankov, Sergey; Turolla, Roberto; Vink, Jacco; Weisskopf, Martin; Wu, Kinwah; Xie, Fei; Zane, Silvia
Published in: The Astrophysical Journal Letters, 2025, ISSN 2041-8213
Publisher: IOP Science
DOI: 10.48550/ARXIV.2505.01832

Revisiting High-energy Polarization from Leptonic and Hadronic Blazar Scenarios

Author(s): Haocheng Zhang, Markus Böttcher, Ioannis Liodakis
Published in: The Astrophysical Journal, Issue 967, 2024, ISSN 0004-637X
Publisher: American Astronomical Society
DOI: 10.3847/1538-4357/AD4112

Intra-night optical polarization monitoring of blazars

Author(s): Aristeidis Polychronakis, Ioannis Liodakis, Anastasia Glykopoulou, Dmitry Blinov, Iván Agudo, Svetlana G. Jorstad, Beatriz Agís-González, Sara Capecchiacci, Alberto Floris, Sebastian Kielhmann, John A. Kypriotakis, Dimitrios A. Langis, Nikos Mandarakas, Karan Pal, Francisco J. Aceituno, Giacomo Bonnoli, Víctor Casanova, Gabriel Emery, Juan Escudero Pedrosa, Jorge Otero-Santos, Daniel Morcuende, Alfredo Sota, Vilppu Piirola
Published in: Astronomy & Astrophysics, Issue 704, 2025, ISSN 0004-6361
Publisher: EDP Sciences
DOI: 10.1051/0004-6361/202557558

Polarization as a Probe of Neutrino Emission from Blazars

Author(s): G. F. Paraschos, E. Traianou, L. C. Debbrecht, I. Liodakis, E. Ros
Published in: The Astrophysical Journal, Issue 989, 2025, ISSN 0004-637X
Publisher: American Astronomical Society
DOI: 10.3847/1538-4357/ADF110

Hard X-Ray Sources in Fermi UFOs

Author(s): Alessandro Paggi, Ioannis Liodakis, John Antoniadis, Chien-Ting Chen, Steven R. Ehlert, Daniel Gruen, Philip Kaaret, Ignacio De La Calle Perez, Elena Jimenez Bailon, Mykhailo Ilin
Published in: The Astrophysical Journal, Issue 1005, 2026, ISSN 0004-637X
Publisher: American Astronomical Society
DOI: 10.3847/1538-4357/AE75AA

Where within the 3C 84 jet are γ -rays produced?

Author(s): Georgios F. Paraschos, Ioannis Liodakis, Svetlana Jorstad, Yuri Y. Kovalev, Sudip Chakraborty, Frédéric Marin, Steven R. Ehlert, Efthalia Traianou, Lena C. Debbrecht, Iván Agudo, Thibault Barnouin, Jacob J. Casey, Laura Di Gesu, Philip Kaaret, Dawoon E. Kim, Fabian Kislat, Ajay Ratheesh, M. Lynne Saade, Francesco Tombesi, Alan Marscher, José-Luis Gómez, Alexander B. Pushkarev, Tuomas Savolainen, Ioannis Myserlis, Mark Gurwell, Garrett Keating, Ramprasad Rao, Sincheol Kang, Sang-Sung Lee, Sanghyun Kim, Whee Yeon Cheong, Hyeon-Woo Jeong, Chanwoo Song, Shan Li, Myeong-Seok Nam, Diego Álvarez-Ortega, Carolina Casadio, Chien-Ting Chen, Enrico Costa, Eugene Churazov, Riccardo Ferrazzoli, Giorgio Galanti, Ildar Khabibullin, Stephen L. O’Dell, Luigi Pacciani, Marco Roncadelli, Oliver J. Roberts, Paolo Soffitta, Douglas A. Swartz, Fabrizio Tavecchio, Martin C. Weisskopf, Irina Zhuravleva
Published in: Astronomy & Astrophysics, Issue 709, 2026, ISSN 0004-6361
Publisher: EDP Sciences
DOI: 10.1051/0004-6361/202659250

Optical polarization variability and its relation to γ -ray activity in blazars

Author(s): Styliana Grigoriou, Anastasia Glykopoulou, Ioannis Liodakis
Published in: Astronomy & Astrophysics, Issue 710, 2026, ISSN 0004-6361
Publisher: EDP Sciences
DOI: 10.1051/0004-6361/202660588

PKS J0805-0111: A Second Owens Valley Radio Observatory Blazar Showing Highly Significant Sinusoidal Radio Variability—The Tip of the Iceberg

Author(s): P. V. de la Parra; S. Kiehlmann; P. Mróz; A. C. S. Readhead; A. Synani; M. C. Begelman; R. D. Blandford; Y. Ding; F. Harrison; I. Liodakis; W. Max-Moerbeck; V. Pavlidou; R. Reeves; M. Vallisneri; M. F. Aller; M. J. Graham; T. Hovatta; C. R. Lawrence; T. J. W. Lazio; A. A. Mahabal; B. Molina; S. O’Neill; T. J. Pearson; V. Ravi; K. Tassis; J. A. Zensus
Published in: The Astrophysical Journal, 2025, ISSN 2041-8213
Publisher: IOP Science
DOI: 10.48550/ARXIV.2408.02645

A Two-week IXPE Monitoring Campaign on Mrk 421

Author(s): Maksym, W. Peter; Liodakis, Ioannis; Saade, M. Lynne; Kim, Dawoon; Middei, Riccardo; Di Gesu, Laura; Kiehlmann, Sebastian; Matzeu, Gabriele; Agudo, Iván; Marscher, Alan; Ehlert, Steven; Jorstad, Svetlana; Kaaret, Philip; Marshall, Herman; Pacciani, Luigi; Perri, Matteo; Puccetti, Simonetta; Kouch, Pouya; Lindfors, Elina; Aceituno, Francisco; Bonnoli, Giacomo; Casanova, Víctor; Escudero, Juan; Gómez, José; Agís-González, Beatriz; Husillos, César; Morcuende, Daniel; Otero-Santos, Jorge; Sota, Alfredo; Piirola, Vilppu; Imazawa, Ryo; Sasada, Mahito; Fukazawa, Yasushi; Kawabata, Koji; Uemura, Makoto; Mizuno, Tsunefumi; Nakaoka, Tatsuya; Akitaya, Hiroshi; Mccall, Callum; Jermak, Helen; Steele, Iain; Borman, George; Grishina, Tatiana; Hagen-Thorn, Vladimir; Kopatskaya, Evgenia; Larionova, Elena; Morozova, Daria; Savchenko, Sergey; Shishkina, Ekaterina; Troitskiy, Ivan; Troitskaya, Yulia; Vasilyev, Andrey; Zhovtan, Alexey; Myserlis, Ioannis; Gurwell, Mark; Keating, Garrett; Rao, Ramprasad; Pauley, Colt; Angelakis, Emmanouil; Kraus, Alexander; Berdyugin, Andrei; Kagitani, Masato; Kravtsov, Vadim; Poutanen, Juri; Sakanoi, Takeshi; Kang, Sincheol; Lee, Sang-Sung; Kim, Sang-Hyun; Cheong, Whee; Jeong, Hyeon-Woo; Song, Chanwoo; Blinov, Dmitry; Shablovinskaya, Elena; Antonelli, Lucio; Bachetti, Matteo; Baldini, Luca; Baumgartner, Wayne; Bellazzini, Ronaldo; Bianchi, Stefano; Bongiorno, Stephen; Bonino, Raffaella; Brez, Alessandro; Bucciantini, Niccoló; Capitanio, Fiamma; Castellano, Simone; Cavazzuti, Elisabetta; Chen, Chien-Ting; Ciprini, Stefano; Costa, Enrico; de Rosa, Alessandra; del Monte, Ettore; Di Lalla, Niccoló; Di Marco, Alessandro; Donnarumma, Immacolata; Doroshenko, Victor; Dovčiak, Michal; Enoto, Teruaki; Evangelista, Yuri; Fabiani, Sergio; Ferrazzoli, Riccardo; Garcia, Javier; Gunji, Shuichi; Hayashida, Kiyoshi; Heyl, Jeremy; Iwakiri, Wataru; Karas, Vladimir; Kislat, Fabian; Kitaguchi, Takao; Kolodziejczak, Jeffery; Krawczynski, Henric; La Monaca, Fabio; Latronico, Luca; Maldera, Simone; Manfreda, Alberto; Marin, Frédéric; Marinucci, Andrea; Massaro, Francesco; Matt, Giorgio; Mitsuishi, Ikuyuki; Muleri, Fabio; Negro, Michela; Ng, C.-Y.; O’dell, Stephen; Omodei, Nicola; Oppedisano, Chiara; Papitto, Alessandro; Pavlov, George; Peirson, Abel; Pesce-Rollins, Melissa; Petrucci, Pierre-Olivier; Pilia, Maura; Possenti, Andrea; Ramsey, Brian; Rankin, John; Ratheesh, Ajay; Roberts, Oliver; Romani, Roger; Sgró, Carmelo; Slane, Patrick; Soffitta, Paolo; Spandre, Gloria; Swartz, Douglas; Tamagawa, Toru; Tavecchio, Fabrizio; Taverna, Roberto; Tawara, Yuzuru; Tennant, Allyn; Thomas, Nicholas; Tombesi, Francesco; Trois, Alessio; Tsygankov, Sergey; Turolla, Roberto; Vink, Jacco; Weisskopf, Martin; Wu, Kinwah; Xie, Fei; Zane, Silvia
Published in: The Astrophysical Journal, 2025, ISSN 2041-8213
Publisher: IOP Science
DOI: 10.48550/ARXIV.2410.19983

Polarimetric diversity in tidal disruption events: Comparative study of low-polarised sources with AT2020mot

Author(s): A. Floris; I. Liodakis; K. I. I. Koljonen; E. Lindfors; B. Agís-Gonzalez; A. Paggi; D. Blinov; K. Nilsson; I. Agudo; P. Charalampopoulos; M. A. Díaz Teodori; J. Escudero Pedrosa; J. Otero-Santos; V. Piirola; M. Newsome; S. Van Velzen
Published in: Astronomy & Astrophysics, 2025, ISSN 1432-0746
Publisher: EDP Sciences
DOI: 10.48550/ARXIV.2509.08895

Compelling Evidence for a Harmonic in the Light Curve of the Supermassive Black Hole Binary Candidate PKS J1309+1154

Author(s): A. C. S. Readhead, M. F. Aller, A. G. Sullivan, R. D. Blandford, P. Mróz, P. V. De la Parra, B. Molina, E. R. Most, M. L. Lister, A. Synani, H. Aller, M. C. Begelman, Y. Ding, M. J. Graham, F. Harrison, T. Hovatta, I. Liodakis, W. Max-Moerbeck, V. Pavlidou, T. J. Pearson, V. Ravi, R. A. Reeves, T. Surti, K. Tassis, S. E. Tremblay, J. A. Zensus
Published in: The Astrophysical Journal Letters, Issue 996, 2026, ISSN 2041-8205
Publisher: American Astronomical Society
DOI: 10.3847/2041-8213/AE2656

The variability patterns of the TeV blazar PG 1553 + 113 from a decade of MAGIC and multiband observations

Author(s): null null, H Abe, S Abe, J Abhir, V A Acciari, I Agudo, T Aniello, S Ansoldi, L A Antonelli, A Arbet Engels, C Arcaro, M Artero, K Asano, D Baack, A Babić, A Baquero, U Barres de Almeida, I Batković, J Baxter, J Becerra González, E Bernardini, J Bernete, A Berti, J Besenrieder, C Bigongiari, A Biland, O Blanch, G Bonnoli, Ž Bošnjak, I Burelli, G Busetto, A Campoy-Ordaz, A Carosi, R Carosi, M Carretero-Castrillo, A J Castro-Tirado, Y Chai, A Cifuentes, S Cikota, E Colombo, J L Contreras, J Cortina, S Covino, G D’Amico, V D’Elia, P Da Vela, F Dazzi, A De Angelis, B De Lotto, A Del Popolo, M Delfino, J Delgado, C Delgado Mendez, D Depaoli, F Di Pierro, L Di Venere, D Dominis Prester, A Donini, D Dorner, M Doro, D Elsaesser, G Emery, J Escudero, L Fariña, A Fattorini, L Foffano, L Font, S Fukami, Y Fukazawa, R J García López, S Gasparyan, M Gaug, J G Giesbrecht Paiva, N Giglietto, F Giordano, P Gliwny, R Grau, J G Green, D Hadasch, A Hahn, L Heckmann, J Herrera, T Hovatta, D Hrupec, M Hütten, R Imazawa, T Inada, R Iotov, K Ishio, I Jimenez Martínez, J Jormanainen, D Kerszberg, G W Kluge, Y Kobayashi, P M Kouch, H Kubo, J Kushida, M Láinez Lezáun, A Lamastra, F Leone, E Lindfors, I Liodakis, S Lombardi, F Longo, M López-Moya, A López-Oramas, S Loporchio, A Lorini, B Machado de Oliveira Fraga, P Majumdar, M Makariev, G Maneva, N Mang, M Manganaro, K Mannheim, M Mariotti, M Martínez, M Martínez-Chicharro, A Mas-Aguilar, D Mazin, S Menchiari, S Mender, D Miceli, T Miener, J M Miranda, R Mirzoyan, M Molero González, E Molina, H A Mondal, A Moralejo, D Morcuende, T Nakamori, C Nanci, V Neustroev, C Nigro, L Nikolić, K Nilsson, K Nishijima, T Njoh Ekoume, K Noda, S Nozaki, Y Ohtani, A Okumura, J Otero-Santos, S Paiano, M Palatiello, D Paneque, R Paoletti, J M Paredes, D Pavlović, M Persic, M Pihet, G Pirola, F Podobnik, P G Prada Moroni, E Prandini, G Principe, C Priyadarshi, W Rhode, M Ribó, J Rico, C Righi, N Sahakyan, T Saito, K Satalecka, F G Saturni, B Schleicher, K Schmidt, F Schmuckermaier, J L Schubert, T Schweizer, A Sciaccaluga, J Sitarek, A Spolon, A Stamerra, J Strišković, D Strom, Y Suda, S Suutarinen, H Tajima, R Takeishi, F Tavecchio, P Temnikov, K Terauchi, T Terzić, M Teshima, L Tosti, S Truzzi, A Tutone, S Ubach, J van Scherpenberg, S Ventura, V Verguilov, I Viale, C F Vigorito, V Vitale, R Walter, C Wunderlich, T Yamamoto, null null, H Jermak, I A Steele, P S Smith, D Blinov, C M Raiteri, M Villata, D O Mirzaqulov, S O Kurtanidze, D Carosati, S S Savchenko, J A Acosta-Pulido, G A Borman, V Bozhilov, M I Carnerero, R A Chigladze, G Damljanovic, S A Ehgamberdiev, M Feige, T S Grishina, A C Gupta, V A Hagen-Thorn, S Ibryamov, R Z Ivanidze, S G Jorstad, J Kania, G N Kimeridze, E N Kopatskaya, M Kopp, L Kunkel, O M Kurtanidze, V M Larionov, E G Larionova, L V Larionova, C Lorey, A Marchini, A P Marscher, M Minev, D A Morozova, M G Nikolashvili, E Ovcharov, D Reinhart, A C Sadun, A Scherbantin, L Schneider, E Semkov, L A Sigua, R Steineke, Yu V Troitskaya, I S Troitskiy, A Valcheva, A A Vasilyev, O Vince, E Zaharieva, N Zottmann, S Kiehlmann, A Readhead, W Max-Moerbeck, R A Reeves, A Sandrinelli, V Fallah Ramazani, M Giroletti, S Righini, N Marchili, B Patricelli, G Ghirlanda, R Lico
Published in: Monthly Notices of the Royal Astronomical Society, Issue 529, 2024, ISSN 0035-8711
Publisher: Oxford University Press (OUP)
DOI: 10.1093/MNRAS/STAE649

Fermi-LAT follow-up observations in seven years of real-time high-energy neutrino alerts

Author(s): S. Garrappa, S. Buson, J. Sinapius, A. Franckowiak, I. Liodakis, C. Bartolini, M. Giroletti, C. Nanci, G. Principe, T. M. Venters
Published in: Astronomy & Astrophysics, Issue 687, 2024, ISSN 0004-6361
Publisher: EDP Sciences
DOI: 10.1051/0004-6361/202449221

Searches for Neutrinos in the Direction of Radio-bright Blazars with the ANTARES Telescope

Author(s): A. Albert, S. Alves, M. André, M. Ardid, S. Ardid, J.-J. Aubert, J. Aublin, B. Baret, S. Basa, Y. Becherini, B. Belhorma, M. Bendahman, F. Benfenati, V. Bertin, S. Biagi, M. Bissinger, J. Boumaaza, M. Bouta, M. C. Bouwhuis, H. Brânzaş, R. Bruijn, J. Brunner, J. Busto, B. Caiffi, D. Calvo, S. Campion, A. Capone, L. Caramete, F. Carenini, J. Carr, V. Carretero, S. Celli, L. Cerisy, M. Chabab, R. Cherkaoui El Moursli, T. Chiarusi, M. Circella, J. A. B. Coelho, A. Coleiro, R. Coniglione, P. Coyle, A. Creusot, A. S. M. Cruz, A. F. Díaz, B. De Martino, C. Distefano, I. Di Palma, A. Domi, C. Donzaud, D. Dornic, D. Drouhin, T. Eberl, T. van Eeden, D. van Eijk, S. El Hedri, N. El Khayati, A. Enzenhöfer, P. Fermani, G. Ferrara, F. Filippini, L. Fusco, S. Gagliardini, J. García, C. Gatius Oliver, P. Gay, N. Geißelbrecht, H. Glotin, R. Gozzini, R. Gracia Ruiz, K. Graf, C. Guidi, L. Haegel, S. Hallmann, H. van Haren, A. J. Heijboer, Y. Hello, J. J. Hernández-Rey, J. Hößl, J. Hofestädt, F. Huang, G. Illuminati, C. W. James, B. Jisse-Jung, M. de Jong, P. de Jong, M. Kadler, O. Kalekin, U. Katz, A. Kouchner, Y. A Kovalev, Y. Y Kovalev, I. Kreykenbohm, V. Kulikovskiy, R. Lahmann, M. Lamoureux, A. Lazo, D. Lefèvre, E. Leonora, G. Levi, S. Le Stum, D. Lopez-Coto, S. Loucatos, L. Maderer, J. Manczak, M. Marcelin, A. Margiotta, A. Marinelli, J. A. Martínez-Mora, P. Migliozzi, A. Moussa, R. Muller, S. Navas, E. Nezri, B. Ó Fearraigh, E. Oukacha, A. Păun, G. E. Păvălaş, S. Peña-Martínez, M. Perrin-Terrin, V. Pestel, P. Piattelli, A. Plavin, C. Poirè, V. Popa, T. Pradier, A. Pushkarev, N. Randazzo, D. Real, S. Reck, G. Riccobene, A. Romanov, A. Sánchez-Losa, A. Saina, F. Salesa Greus, D. F. E. Samtleben, M. Sanguineti, P. Sapienza, J. Schnabel, J. Schumann, F. Schüssler, J. Seneca, M. Spurio, Th. Stolarczyk, M. Taiuti, Y. Tayalati, S. J. Tingay, S. Troitsky, B. Vallage, G. Vannoye, V. Van Elewyck, S. Viola, D. Vivolo, J. Wilms, S. Zavatarelli, A. Zegarelli, J. D. Zornoza, J. Zúñiga, null null, T. Hovatta, S. Kiehlmann, I. Liodakis, V. Pavlidou, A. C. S Readhead, null null
Published in: The Astrophysical Journal, Issue 964, 2024, ISSN 0004-637X
Publisher: American Astronomical Society
DOI: 10.3847/1538-4357/AD1F5B

Detection of Compton Scattering in the Jet of 3C 84

Author(s): Ioannis Liodakis, Sudip Chakraborty, Frédéric Marin, Steven R. Ehlert, Thibault Barnouin, Pouya M. Kouch, Kari Nilsson, Elina Lindfors, Tapio Pursimo, Georgios F. Paraschos, Riccardo Middei, Anna Trindade Falcão, Svetlana Jorstad, Iván Agudo, Yuri Y. Kovalev, Jacob J. Casey, Laura Di Gesu, Philip Kaaret, Dawoon E. Kim, Fabian Kislat, Ajay Ratheesh, M. Lynne Saade, Francesco Tombesi, Alan Marscher, Francisco José Aceituno, Giacomo Bonnoli, Víctor Casanova, Gabriel Emery, Juan Escudero Pedrosa, Daniel Morcuende, Jorge Otero-Santos, Alfredo Sota, Vilppu Piirola, Rumen Bachev, Anton Strigachev, George A. Borman, Tatiana S. Grishina, Vladimir A. Hagen-Thorn, Evgenia N. Kopatskaya, Elena G. Larionova, Daria A. Morozova, Sergey S. Savchenko, Ekaterina V. Shishkina, Ivan S. Troitskiy, Yulia V. Troitskaya, Andrey A. Vasilyev, Alexey V. Zhovtan, Ioannis Myserlis, Mark Gurwell, Garrett Keating, Ramprasad Rao, Sincheol Kang, Sang-Sung Lee, Sanghyun Kim, Whee Yeon Cheong, Hyeon-Woo Jeong, Chanwoo Song, Shan Li, Myeong-Seok Nam, Diego Álvarez-Ortega, Carolina Casadio, Emmanouil Angelakis, Alexander Kraus, Jenni Jormanainen, Vandad Fallah Ramazani, Chien-Ting Chen, Enrico Costa, Eugene Churazov, Riccardo Ferrazzoli, Giorgio Galanti, Ildar Khabibullin, Stephen L. O’Dell, Luigi Pacciani, Marco Roncadelli, Oliver J. Roberts, Paolo Soffitta, Douglas A. Swartz, Fabrizio Tavecchio, Martin C. Weisskopf, Irina Zhuravleva
Published in: The Astrophysical Journal Letters, Issue 994, 2025, ISSN 2041-8205
Publisher: American Astronomical Society
DOI: 10.3847/2041-8213/AE157D

Unveiling blazar synchrotron emission: A multiwavelength polarimetric study of high-synchrotron and low-synchrotron peaked populations

Author(s): Sara Capecchiacci, Ioannis Liodakis, Riccardo Middei, Dawoon E. Kim, Laura Di Gesu, Iván Agudo, Beatriz Agís-González, Axel Arbet-Engels, Dmitry Blinov, Chien-Ting Chen, Steven R. Ehlert, Ephraim Gau, Lea Heckmann, Kun Hu, Svetlana G. Jorstad, Philip Kaaret, Pouya M. Kouch, Henric Krawczynski, Elina Lindfors, Frédéric Marin, Alan P. Marscher, Ioannis Myserlis, Stephen L. O’Dell, Luigi Pacciani, David Paneque, Matteo Perri, Simonetta Puccetti, M. Lynne Saade, Fabrizio Tavecchio, Allyn F. Tennant, Efthalia Traianou, Martin C. Weisskopf, Kinwah Wu, Francisco José Aceituno, Giacomo Bonnoli, Víctor Casanova, Gabriel Emery, Juan Escudero, Daniel Morcuende, Jorge Otero-Santos, Alfredo Sota, Vilppu Piirola, George A. Borman, Evgenia N. Kopatskaya, Elena G. Larionova, Daria A. Morozova, Ekaterina V. Shishkina, Sergey S. Savchenko, Andrey A. Vasilyev, Tatiana S. Grishina, Ivan S. Troitskiy, Alexey V. Zhovtan, Callum McCall, Helen E. Jermak, Iain A. Steele, Rumen Bachev, Anton Strigachev, Ryo Imazawa, Mahito Sasada, Yasushi Fukazawa, Koji S. Kawabata, Makoto Uemura, Tsunefumi Mizuno, Tatsuya Nakaoka, Sumie Tochihara, Takahiro Akai, Hiroshi Akitaya, Andrei V. Berdyugin, Masato Kagitani, Vadim Kravtsov, Juri Poutanen, Takeshi Sakanoi, Diego Álvarez-Ortega, Carolina Casadio, Sincheol Kang, Sang-Sung Lee, Sanghyun Kim, Whee Yeon Cheong, Hyeon-Woo Jeong, Chanwoo Song, Shan Li, Myeong-Seok Nam, Mark Gurwell, Garrett Keating, Ramprasad Rao, Emmanouil Angelakis, Alexander Kraus, Petra Benke, Lena Debbrecht, Julia Eich, Florian Eppel, Andrea Gokus, Steven Hämmerich, Jonas Heßdörfer, Matthias Kadler, Dana Kirchner, Georgios Filippos Paraschos, Florian Rösch, Wladislaw Schulga
Published in: Astronomy & Astrophysics, Issue 703, 2025, ISSN 0004-6361
Publisher: EDP Sciences
DOI: 10.1051/0004-6361/202555392

The IXPE and multifrequency polarimetric view of the extreme blazars 1ES 1101-232 and RGB J0710+591

Author(s): Fabrizio Tavecchio, Dawoon E. Kim, Gabriel Emery, Ioannis Liodakis, Iván Agudo, Paolo Coppi, Giampiero Tagliaferri, Laura Di Gesu, Tullia Sbarrato, Lucia Ballo, Alberto Sciaccaluga, Steven R. Ehlert, Giacomo Bonnoli, Francisco José Aceituno, Carolina Casadio, Víctor Casanova, Immacolata Donnarumma, Juan Escudero, Daniel Morcuende, Jorge Otero-Santos, Alfredo Sota, Vilppu Piirola, Pouya M. Kouch, Elina Lindfors, Kari Nilsson, Ioannis Myserlis, Mark Gurwell, Garrett Keating, Ramprasad Rao, Emmanouil Angelakis, Alexander Kraus, Ryo Imazawa, Mahito Sasada, Yasushi Fukazawa, Koji S. Kawabata, Makoto Uemura, Tsunefumi Mizuno, Tatsuya Nakaoka, Sumie Tochihara, Takahiro Akai, Hiroshi Akitaya, Rumen Bachev, Anton Strigachev, Petra Benke, Lena Debbrecht, Julia Eich, Florian Eppel, Andrea Gokus, Steven Hämmerich, Jonas Heßdörfer, Matthias Kadler, Sanghyun Kim, Dana Kirchner, Georgios Filippos Paraschos, Florian Rösch, Wladislaw Schulga
Published in: Astronomy & Astrophysics, Issue 709, 2026, ISSN 0004-6361
Publisher: EDP Sciences
DOI: 10.1051/0004-6361/202558716

Association of the IceCube neutrinos with CAZ blazar light curves

Author(s): Pouya M. Kouch, Talvikki Hovatta, Elina Lindfors, Ioannis Liodakis, Karri I. I. Koljonen, Alessandro Paggi
Published in: Astronomy & Astrophysics, Issue 708, 2026, ISSN 0004-6361
Publisher: EDP Sciences
DOI: 10.1051/0004-6361/202557584

IXPE observation of PKS 2155–304 reveals the most highly polarized blazar

Author(s): Kouch, Pouya; Liodakis, Ioannis; Middei, Riccardo; Kim, Dawoon; Tavecchio, Fabrizio; Marscher, Alan; Marshall, Herman; Ehlert, Steven; Di Gesu, Laura; Jorstad, Svetlana; Agudo, Iván; Madejski, Grzegorz; Romani, Roger; Errando, Manel; Lindfors, Elina; Nilsson, Kari; Toppari, Ella; Potter, Stephen; Imazawa, Ryo; Sasada, Mahito; Fukazawa, Yasushi; Kawabata, Koji; Uemura, Makoto; Mizuno, Tsunefumi; Nakaoka, Tatsuya; Akitaya, Hiroshi; Mccall, Callum; Jermak, Helen; Steele, Iain; Myserlis, Ioannis; Gurwell, Mark; Keating, Garrett; Rao, Ramprasad; Kang, Sincheol; Lee, Sang-Sung; Kim, Sang-Hyun; Cheong, Whee Yeon; Jeong, Hyeon-Woo; Angelakis, Emmanouil; Kraus, Alexander; Aceituno, Francisco José; Bonnoli, Giacomo; Casanova, Víctor; Escudero, Juan; Agís-González, Beatriz; Husillos, César; Morcuende, Daniel; Otero-Santos, Jorge; Sota, Alfredo; Bachev, Rumen; Antonelli, Lucio Angelo; Bachetti, Matteo; Baldini, Luca; Baumgartner, Wayne; Bellazzini, Ronaldo; Bianchi, Stefano; Bongiorno, Stephen; Bonino, Raffaella; Brez, Alessandro; Bucciantini, Niccolò; Capitanio, Fiamma; Castellano, Simone; Cavazzuti, Elisabetta; Chen, Chien-Ting; Ciprini, Stefano; Costa, Enrico; de Rosa, Alessandra; del Monte, Ettore; Di Lalla, Niccolò; Di Marco, Alessandro; Donnarumma, Immacolata; Doroshenko, Victor; Dovčiak, Michal; Enoto, Teruaki; Evangelista, Yuri; Fabiani, Sergio; Ferrazzoli, Riccardo; Garcia, Javier; Gunji, Shuichi; Hayashida, Kiyoshi; Heyl, Jeremy; Iwakiri, Wataru; Kaaret, Philip; Karas, Vladimir; Kislat, Fabian; Kitaguchi, Takao; Kolodziejczak, Jeffery; Krawczynski, Henric; La Monaca, Fabio; Latronico, Luca; Maldera, Simone; Manfreda, Alberto; Marin, Frédéric; Marinucci, Andrea; Massaro, Francesco; Matt, Giorgio; Mitsuishi, Ikuyuki; Muleri, Fabio; Negro, Michela; Ng, Chi-Yung; O’dell, Stephen; Omodei, Nicola; Oppedisano, Chiara; Papitto, Alessandro; Pavlov, George; Peirson, Abel Lawrence; Perri, Matteo; Pesce-Rollins, Melissa; Petrucci, Pierre-Olivier; Pilia, Maura; Possenti, Andrea; Poutanen, Juri; Puccetti, Simonetta; Ramsey, Brian; Rankin, John; Ratheesh, Ajay; Roberts, Oliver; Sgrò, Carmelo; Slane, Patrick; Soffitta, Paolo; Spandre, Gloria; Swartz, Douglas; Tamagawa, Toru; Taverna, Roberto; Tawara, Yuzuru; Tennant, Allyn; Thomas, Nicholas; Tombesi, Francesco; Trois, Alessio; Tsygankov, Sergey; Turolla, Roberto; Vink, Jacco; Weisskopf, Martin; Wu, Kinwah; Xie, Fei; Zane, Silvia
Published in: Astronomy & Astrophysics, 2024, ISSN 1432-0746
Publisher: EDP Sciences
DOI: 10.48550/ARXIV.2406.01693

Dark and bright sides of the Broad Line Region clouds as seen in the FeII emission of SDSS RM 102

Author(s): Alberto Floris; Ashwani Pandey; Bozena Czerny; Mary Loli Martinez Aldama; Swayamtrupta Panda; Paola Marziani; Raj Prince
Published in: Astronomy & Astrophysics, 2025, ISSN 1432-0746
Publisher: EDP Sciences
DOI: 10.48550/ARXIV.2408.17323

A Comparison of the X-Ray Polarimetric Properties of Stellar and Supermassive Black Holes

Author(s): M. Lynne Saade, Philip Kaaret, Ioannis Liodakis, Steven R. Ehlert
Published in: The Astrophysical Journal, Issue 974, 2024, ISSN 0004-637X
Publisher: American Astronomical Society
DOI: 10.3847/1538-4357/AD73A3

Very high-energy gamma-ray detection and long-term multiwavelength view of the flaring blazar B2 1811+31

Author(s): K. Abe; S. Abe; J. Abhir; A. Abhishek; V. A. Acciari; A. Aguasca-Cabot; I. Agudo; T. Aniello; S. Ansoldi; L. A. Antonelli; A. Arbet Engels; C. Arcaro; K. Asano; A. Babić; U. Barres de Almeida; J. A. Barrio; L. Barrios-Jiménez; I. Batković; J. Baxter; J. Becerra González; W. Bednarek; E. Bernardini; J. Bernete; A. Berti; J. Besenrieder; C. Bigongiari; A. Biland; O. Blanch; G. Bonnoli; Ž. Bošnjak; E. Bronzini; I. Burelli; A. Campoy-Ordaz; A. Carosi; R. Carosi; M. Carretero-Castrillo; A. J. Castro-Tirado; D. Cerasole; G. Ceribella; A. Chilingarian; A. Cifuentes; E. Colombo; J. L. Contreras; J. Cortina; S. Covino; F. D’Ammando; G. D’Amico; P. Da Vela; F. Dazzi; A. De Angelis; B. De Lotto; R. de Menezes; M. Delfino; J. Delgado; C. Delgado Mendez; F. Di Pierro; R. Di Tria; L. Di Venere; A. Dinesh; D. Dominis Prester; A. Donini; D. Dorner; M. Doro; L. Eisenberger; D. Elsaesser; J. Escudero; L. Fariña; L. Foffano; L. Font; S. Fröse; Y. Fukazawa; R. J. García López; M. Garczarczyk; S. Gasparyan; M. Gaug; J. G. Giesbrecht Paiva; N. Giglietto; F. Giordano; P. Gliwny; T. Gradetzke; R. Grau; D. Green; J. G. Green; P. Günther; D. Hadasch; A. Hahn; T. Hassan; L. Heckmann; J. Herrera Llorente; D. Hrupec; R. Imazawa; D. Israyelyan; T. Itokawa; I. Jiménez Martínez; J. Jiménez Quiles; J. Jormanainen; S. Kankkunen; T. Kayanoki; D. Kerszberg; M. Khachatryan; G. W. Kluge; Y. Kobayashi; J. Konrad; P. M. Kouch; H. Kubo; J. Kushida; M. Láinez; A. Lamastra; E. Lindfors; S. Lombardi; F. Longo; R. López-Coto; M. López-Moya; A. López-Oramas; S. Loporchio; A. Lorini; L. Lulić; E. Lyard; P. Majumdar; M. Makariev; G. Maneva; M. Manganaro; S. Mangano; K. Mannheim; M. Mariotti; M. Martínez; P. Maruševec; A. Mas-Aguilar; D. Mazin; S. Menchiari; S. Mender; D. Miceli; J. M. Miranda; R. Mirzoyan; M. Molero González; E. Molina; H. A. Mondal; A. Moralejo; T. Nakamori; C. Nanci; V. Neustroev; L. Nickel; M. Nievas Rosillo; C. Nigro; L. Nikolić; K. Nilsson; K. Nishijima; T. Njoh Ekoume; K. Noda; S. Nozaki; A. Okumura; S. Paiano; D. Paneque; R. Paoletti; J. M. Paredes; L. Pavletić; M. Peresano; M. Persic; M. Pihet; G. Pirola; F. Podobnik; P. G. Prada Moroni; E. Prandini; G. Principe; W. Rhode; M. Ribó; J. Rico; C. Righi; N. Sahakyan; T. Saito; F. G. Saturni; K. Schmitz; F. Schmuckermaier; J. L. Schubert; A. Sciaccaluga; G. Silvestri; J. Sitarek; V. Sliusar; D. Sobczynska; A. Stamerra; J. Strišković; D. Strom; M. Strzys; Y. Suda; H. Tajima; M. Takahashi; R. Takeishi; P. Temnikov; K. Terauchi; T. Terzić; M. Teshima; A. Tutone; S. Ubach; J. van Scherpenberg; M. Vazquez Acosta; S. Ventura; G. Verna; I. Viale; A. Vigliano; C. F. Vigorito
Published in: Astronomy & Astrophysics, 2025, ISSN 1432-0746
Publisher: EDP Sciences
DOI: 10.48550/ARXIV.2503.19054

Tracking Down the Broadband Polarimetric Properties of PG 1553+113

Author(s): Riccardo Middei, Svetlana G. Jorstad, Alan P. Marscher, Ioannis Liodakis, Matteo Perri, Alessandro Maselli, Stefano Ciprini, Emanuele Nardini, Simonetta Puccetti, Laura Di Gesu, Iván Agudo, Dawoon E. Kim, Ioannis Myserlis, A. Trindade Falcão, D. Ł. Król, Lucio A. Antonelli, Tommaso Aniello, Pouya M. Kouch, Kari Nilsson, Elina Lindfors, Tapio Pursimo, Francisco José Aceituno, Víctor Casanova, Gabriel Emery, Juan Escudero Pedrosa, Jorge Otero-Santos, Alfredo Sota, Vilppu Piirola, George A. Borman, Tatiana S. Grishina, Vladimir A. Hagen-Thorn, Evgenia N. Kopatskaya, Elena G. Larionova, Daria A. Morozova, Sergey S. Savchenko, Ekaterina V. Shishkina, Ivan S. Troitskiy, Yulia V. Troitskaya, Andrey A. Vasilyev, Alexey V. Zhovtan, Petra Benke, Lena Debbrecht, Julia Eich, Florian Eppel, Andrea Gokus, Steven Hämmerich, Jonas Hessdörfer, Matthias Kadler, Dana Kirchner, Georgios F. Paraschos, Florian Rösch, Wladislaw Schulga, Mark Gurwell, Garrett Keating, Ramprasad Rao, Emmanouil Angelakis, Alexander Kraus, Beatriz Agís-González, Dmitry Blinov, Anastasia Glykopoulou, Sara Capecchiacci, Alberto Floris, Panagiotis Fotis, Alkmini Koukoutsi, John A. Kypriotakis, Dimitrios A. Langis, Dimitrios Rompogiannakis, Aristeidis Polychronakis, Vasiliki Tsioupli, Stavros Vogiatzis, Orestis Zoumpoulakis, Sumie Tochihara, Ryo Imazawa, Mahito Sasada, Yasushi Fukazawa, Koji S. Kawabata, Makoto Uemura, Tsunefumi Mizuno, Tatsuya Nakaoka, Hiroshi Akitaya, Takahiro Akai
Published in: The Astrophysical Journal, Issue 1004, 2026, ISSN 0004-637X
Publisher: American Astronomical Society
DOI: 10.3847/1538-4357/AE6CF0

Discriminating blazar emission models with high-energy polarimetry: Multi-band predictions and detectability

Author(s): Sara Capecchiacci, Ioannis Liodakis, Haocheng Zhang, Michela Negro, Jorge Otero Santos
Published in: Astronomy & Astrophysics, Issue 711, 2026, ISSN 0004-6361
Publisher: EDP Sciences
DOI: 10.1051/0004-6361/202660331

The imaging x-ray polarimetry explorer 2.5 years later

Author(s): Paolo Soffitta, Luca Baldini, Wayne H. Baumgartner, Ronaldo Bellazzini, Stephen D. Bongiorno, Niccolò Bucciantini, Enrico Costa, Michal Dovciak, Steven R. Ehlert, Philip E. Kaaret, Jeffery J. Kolodziejczak, Luca Latronico, Frédéric Marin, Alan P. Marscher, Herman L. Marshall, Giorgio Matt, Fabio Muleri, Stephen L. O'Dell, Juri Poutanen, Brian Ramsey, Roger W. Romani, Patrick Slane, Allyn Tennant, Roberto Turolla, Martin C. Weisskopf, Ivan Agudo, Angelo Antonelli, Matteo Bachetti, Stefano Bianchi, Raffaella Bonino, Alessandro Brez, Fiamma Capitanio, Simone Castellano, Elisabetta Cavazzuti, Chien-Ting Chen, Stefano Ciprini, Massimo Cocchi, Eugene Churazov, Alessandra De Rosa, Ettore Del Monte, Laura Di Gesu, Niccolò Di Lalla, Alessandro Di Marco, Immacolata Donnarumma, Viktor Doroshenko, Teruaki Enoto, Yuri Evangeista, Sergio Fabiani, Riccardo Ferrazzoli, Javier Garcia, Shuichi Gunji, Jeremy Heyl, Adam Ingram, Wataru Iwakiri, Svetlana Jorstad, Vladimir Karas, Vicky Kaspi, Fabian Kislat, Takau Kitaguchi, Henric Krawczynski, Fabio La Monaca, Ioannis Liodakis, Greg Madejski, Simone Maldera, Alberto Manfreda, Andrea Marinucci, Francesco Massaro, Ikuyuki Mitsuishi, Tsunefumi Mizuno, Negro Michela, Stephen Ng, Nicola Omodei, Chiara Oppedisano, Alessandro Papitto, George G. Pavlov, Matteo Perri, Melissa Peshe-Rollins, Pierre-Olivier PetruccI, Maura Pilia, Andrea Possenti, Simonetta Puccetti, John Rankin, Ajay Ratheesh, Olivier J. Roberts, Carmelo sgrò, Gloria Spandre, Luigi Stella, Rashid Sunyaev, Douglas A. Swartz, Toru Tamagawa, Fabrizio Tavecchio, Roberto Taverna, Yuzuru Tawara, Nicholas Thomas, Francesco Tombesi, Alessio Trois, Sergey S. Tsygankov, Jacco Vink, Kinwah Wu, Fei Xie, Silvia Zane
Published in: Space Telescopes and Instrumentation 2024: Ultraviolet to Gamma Ray, 2024
Publisher: SPIE
DOI: 10.1117/12.3020418

The WALOP software

Author(s): John A. Kypriotakis, Bhushan Joshi, Dmitriy Blinov, Sebastian Kiehlmann, Siddharth Maharana, Chaitanya V. Rajarshi, Ramaprakash N. Anamparambu, Artem Basyrov, Myrto Falalaki, Tuhin Ghosh, Eirik Gjerløw, Ioannis Liodakis, Nikolaos Mandarakas, Georgia V. Panopoulou, Vasiliki Pavlidou, Timothy J. Pearson, Vincent Pelgrims, Stephen B. Potter, Anthony C. Readhead, Raphael Skalidis, Konstantinos Tassis, Namita Uppal
Published in: Software and Cyberinfrastructure for Astronomy VIII, 2024
Publisher: SPIE
DOI: 10.1117/12.3018100

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