Related papers
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200 papers
While X-ray Spectroscopy, Timing and Imaging have improved verymuch since 1962, when the first astronomical non-solar source was discovered, especially with the launch of Newton/X-ray Multi-Mirror Mission, Rossi/X-ray Timing Explorer and…
Instrumentation and Methods for Astrophysics · Physics
2021-10-27
Paolo Soffitta , Luca Baldini , Ronaldo Bellazzini , Enrico Costa , Luca Latronico , Fabio Muleri , Ettore Del Monte , Sergio Fabiani , Massimo Minuti , Michele Pinchera , Carmelo Sgrò , Gloria Spandre , Alessio Trois , Fabrizio Amici , Hans Andersson , Primo Attinà , Matteo Bachetti , Mattia Barbanera , Fabio Borotto , Alessandro Brez , Daniele Brienza , Ciro Caporale , Claudia Cardelli , Rita Carpentiero , Simone Castellano , Marco Castronuovo , Luca Cavalli , Elisabetta Cavazzuti , Marco Ceccanti , Mauro Centrone , Stefano Ciprini , Saverio Citraro , Fabio D' Amico , Elisa D' Alba , Sergio Di Cosimo , Niccolò Di Lalla , Alessandro Di Marco , Giuseppe Di Persio , Immacolata Donnarumma , Yuri Evangelista , Riccardo Ferrazzoli , Asami Hayato , Takao Kitaguchi , Fabio La Monaca , Carlo Lefevre , Pasqualino Loffredo , Paolo Lorenzi , Leonardo Lucchesi , Carlo Magazzu , Simone Maldera , Alberto Manfreda , Elio Mangraviti , Marco Marengo , Giorgio Matt , Paolo Mereu , Alfredo Morbidini , Federico Mosti , Toshio Nakano , Hikmat Nasimi , Barbara Negri , Seppo Nenonen , Alessio Nuti , Leonardo Orsini , Matteo Perri , Melissa Pesce Rollins , Raffaele Piazzolla , Maura Pilia , Alessandro Profeti , Simonetta Puccetti , John Rankin , Ajay Ratheesh , Alda Rubini , Francesco Santoli , Paolo Sarra , Emanuele Scalise , Andrea Sciortino , Toru Tamagawa , Marcello Tardiola , Antonino Tobia , Marco Vimercati , Fei Xie
The lower energy peak of the spectral energy distribution of blazars has commonly been ascribed to synchrotron radiation from relativistic particles in the jets. Despite the consensus regarding jet emission processes, the particle…
High Energy Astrophysical Phenomena · Physics
2023-08-02
Riccardo Middei , Matteo Perri , Simonetta Puccetti , Ioannis Liodakis , Laura Di Gesu , Alan P. Marscher , Nicole Rodriguez Cavero , Fabrizio Tavecchio , Immacolata Donnarumma , Marco Laurenti , Svetlana G. Jorstad , Iván Agudo , Herman L. Marshall , Luigi Pacciani , Dawoon E. Kim , Francisco José Aceituno , Giacomo Bonnoli , Víctor Casanova , Beatriz Agís-González , Alfredo Sota , Carolina Casadio , Juan Escudero , Ioannis Myserlis , Albrecht Sievers , Pouya M. Kouch , Elina Lindfors , Mark Gurwell , Garrett K. Keating , Ramprasad Rao , Sincheol Kang , Sang-Sung Lee , Sang-Hyun Kim , Whee Yeon Cheong , Hyeon-Woo Jeong , Emmanouil Angelakis , Alexander Kraus , Lucio A. 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 , Elisabetta Cavazzuti , Chien-Ting Chen , Stefano Ciprini , Enrico Costa , Alessandra De Rosa , Ettore Del Monte , Niccolò Di Lalla , Alessandro Di Marco , Victor Doroshenko , Michal Dovčiak , Steven R. Ehlert , Teruaki Enoto , Yuri Evangelista , Sergio Fabiani , Riccardo Ferrazzoli , Javier A. García , 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 , Tsunefumi Mizuno , Fabio Muleri , Michela Negro , Chi-Yung Ng , Stephen L. O'Dell , Nicola Omodei , Chiara Oppedisano , Alessandro Papitto , George G. Pavlov , Abel L. Peirson , Melissa Pesce-Rollins , Pierre-Olivier Petrucci , Maura Pilia , Andrea Possenti , Juri Poutanen , Brian D. Ramsey , John Rankin , Ajay Ratheesh , Oliver J. Roberts , Roger W. Romani , 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 , Kinwah Wu , Fei Xie , Silvia Zane
The Imaging X-ray Polarimetry Explorer (IXPE) observed for the first time highly polarized X-ray emission from the magnetar 1E 1841-045, targeted after a burst-active phase in August 2024. To date, IXPE has observed four other magnetars…
High Energy Astrophysical Phenomena · Physics
2025-03-03
Michela Rigoselli , Roberto Taverna , Sandro Mereghetti , Roberto Turolla , Gian Luca Israel , Silvia Zane , Lorenzo Marra , Fabio Muleri , Alice Borghese , Francesco Coti Zelati , Davide De Grandis , Matteo Imbrogno , Ruth M. E. Kelly , Paolo Esposito , Nanda Rea
An optimal estimate for Stokes parameters is derived for the situation in X-ray astronomy where the instrument has a modulation factor that varies significantly with energy but the signals are very weak or mildly polarized. For such…
The blazar Markarian 501 (Mrk 501) was observed on three occasions over a 4-month period between 2022 March and 2022 July with the Imaging X-ray Polarimetry Explorer (IXPE). In this paper, we report for the first time on the third IXPE…
High Energy Astrophysical Phenomena · Physics
2025-07-11
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. Agís-González , 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. Fernández-García , M. García-Comas , T. S. Grishina , P. Hakala , T. Hovatta , Y. D. Hu , C. Husillos , J. Escudero , J. Jormanainen , F. José Aceituno , M. Kagitani , S. Kiehlmann , E. Kontopodis , E. N. Kopatskaya , P. M. Kouch , V. Kravtsov , A. Lähteenmäki , 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. Salomé , S. S. Savchenko , R. Skalidis , A. Sota , I. Syrjärinne , 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 , M. Gurwell , K. Hayashida , J. Heyl , W. Iwakiri , P. Kaaret , V. Karas , G. 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
We report on the average and orbital phase-resolved polarization of Cyg X-3 in the hard state during the 2023 Imaging X-ray Polarimetry Explorer (IXPE) observational campaign. We find the polarization degree of $ 21.2 \pm 0.4 \% $ and…
High Energy Astrophysical Phenomena · Physics
2025-12-16
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
We review the tools and procedures for the analysis of the data collected by X-ray photoelectric gas polarimeters, like the ones on-board the Imaging X-ray Polarimetry Explorer (IXPE). Although many of such tools are in principle common…
X-ray Astrophysics, which addresses extreme physics in extreme conditions, is particularly well suited for answering questions related to known physics. Reversely tiny effects, but integrated along sidereal distances, allow to probe…
We present near-simultaneous X-ray and optical polarization measurements in the high synchrotron peaked (HSP) blazar Mrk 421. The X-ray polarimetric observations were carried out using {\it Imaging X-ray Polarimetry Explorer} ({\it IXPE})…
High Energy Astrophysical Phenomena · Physics
2024-09-26
Athira M. Bharathan , C. S. Stalin , S. Sahayanathan , Kiran Wani , Amit Kumar Mandal , Rwitika Chatterjee , Santosh Joshi , Jeewan C Pandey , Blesson Mathew , Vivek K. Agrawal
We present the first multi-wavelength study of Mrk 501 including very-high-energy (VHE) gamma-ray observations simultaneous to X-ray polarization measurements from the Imaging X-ray Polarimetry Explorer (IXPE). We use radio-to-VHE data from…
High Energy Astrophysical Phenomena · Physics
2025-09-03
S. Abe , J. Abhir , V. A. Acciari , A. Aguasca-Cabot , I. Agudo , T. Aniello , S. Ansoldi , L. A. Antonelli , A. Arbet Engels , C. Arcaro , K. Asano , A. Babić , A. Baquero , U. Barres de Almeida , J. A. Barrio , I. Batković , A. Bautista , J. Baxter , J. Becerra González , W. Bednarek , E. Bernardini , M. Bernardos , 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 , 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 , A. Del Popolo , M. Delfino , 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 , 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 , K. Ishio , I. Jiménez Mart'inez , T. Kayanoki , 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 , E. Lyard , 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 , 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 , 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 , G. Silvestri , J. Sitarek , D. Sobczynska , A. Spolon , A. Stamerra , J. Strišković , D. Strom , 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 , S. Ventura , I. Viale , C. F. Vigorito , V. Vitale , I. Vovk , R. Walter , M. Will , C. Wunderlich , T. Yamamoto , I. Liodakis , F. J. Aceituno , B. Agís-González , H. Akitaya , M. I. Bernardos , D. Blinov , I. G. Bourbah , C. Casadio , V. Casanova , F. D'Ammando , V. Fallah Ramazani , E. Fernández-García , Y. Fukazawa , M. García-Comas , E. Gau , A. Gokus , M. Gurwell , P. Hakala , T. Hovatta , Y. -D. Hu , C. Husillos , J. Jormanainen , S. G. Jorstad , K. S. Kawabata , G. K. Keating , S. Kiehlmann , E. Kontopodis , H. Krawczynski , A. Lähteenmäki , C. Leto , L. Lisalda , N. Mandarakas , A. Marchini , A. P. Marscher , W. Max-Moerbeck , R. Middei , T. Mizuno , I. Myserlis , T. Nakaoka , M. Perri , S. Puccetti , R. Rao , A. C. S. Readhead , R. Reeves , N. Rodriguez Cavero , Q. Salomé , M. Sasada , R. Skalidis , A. Sota , I. Syrjärinne , M. Tornikoski , M. Uemura , F. Verrecchia , A. Vervelaki
We report on a nine-month monitoring campaign of the blazar PG 1553+113, relying on three observations carried out in 2025 with the Imaging X-ray Polarimetry Explorer (IXPE) and supported by multi-wavelength facilities. The source displayed…
High Energy Astrophysical Phenomena · Physics
2026-05-14
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
In the 50 years since the advent of X-ray astronomy there have been many scientific advances due to the development of new experimental techniques for detecting and characterising X-rays. Observations of X-ray polarisation have, however,…
Instrumentation and Methods for Astrophysics · Physics
2016-08-08
M. Chauvin , H. -G. Florén , M. Jackson , T. Kamae , T. Kawano , M. Kiss , M. Kole , V. Mikhalev , E. Moretti , G. Olofsson , S. Rydström , H. Takahashi , J. Lind , J. -E. Strömberg , O. Welin , A. Iyudin , D. Shifrin , M. Pearce
Polarimetric properties of blazars allow us to put constraints on the acceleration mechanisms that fuel their powerful jets. By studying the multiwavelength polarimetric behaviour of high synchrotron peaked (HSP) and low synchrotron peaked…
High Energy Astrophysical Phenomena · Physics
2025-08-21
Sara Capecchiacci , Ioannis Liodakis , Riccardo Middei , Dawoon E. Kim , Laura Di Gesu , Ivan Agudo , Beatriz Agis-Gonzalez , 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 , Frederic 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 Jose Aceituno , Giacomo Bonnoli , Victor 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 Alvarez-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 Hammerich , Jonas Hessdorfer , Matthias Kadler , Dana Kirchner , Georgios Filippos Paraschos , Florian Rosch , Wladislaw Schulga
We report the discovery of significant X-ray polarization from the dynamically confirmed black hole X-ray binary (BHXB) GS 1354-64 during its 2025-2026 outburst, obtained with the Imaging X-ray Polarimetry Explorer (IXPE). The observation,…
High Energy Astrophysical Phenomena · Physics
2026-03-05
Swati Ravi , Lorenzo Marra , James F. Steiner , Guglielmo Mastroserio , Mason Ng , Joey Neilsen , Herman L. Marshall , Fiamma Capitanio , Sudeb Ranjan Datta , Elise Egron , Javier A. Garcia , Adam Ingram , Philip Kaaret , Ole Koenig , Honghui Liu , Romana Mikusincova , Edward J. R. Nathan , P. -O. Petrucci , Jakub Podgorny , Chiara Salvaggio , Jiri Svoboda , Alexandra Veledina , Yuexin Zhang
The Imaging X-ray Polarimetry Explorer (IXPE) observations of accreting X-ray pulsars (XRPs) continue to provide novel insights into the physics and geometry of these sources. We present the first X-ray polarimetric study of the persistent…
High Energy Astrophysical Phenomena · Physics
2025-05-28
Vladislav Loktev , Sofia V. Forsblom , Sergey S. Tsygankov , Juri Poutanen , Alexander A. Mushtukov , Alessandro Di Marco , Jeremy Heyl , Ruth M. E. Kelly , Fabio La Monaca , Mason Ng , Swati Ravi , Alexander Salganik , Andrea Santangelo , Valery F. Suleimanov , Silvia Zane
The Gas Pixel Detector is a gas detector, sensitive to the polarization of X-rays, currently flying on-board IXPE - the first observatory dedicated to X-ray polarimetry. It detects X-rays and their polarization by imaging the ionization…
Instrumentation and Methods for Astrophysics · Physics
2023-04-12
John Rankin , Fabio Muleri , Alessandro Di Marco , Sergio Fabiani , Fabio La Monaca , Paolo Soffitta , Matteo Bachetti , Luca Baldini , Enrico Costa , Niccolò Di Lalla , Alberto Manfreda , Stephen L. O'Dell , Matteo Perri , Simonetta Puccetti , Brian D. Ramsey , Carmelo Sgrò , Allyn F. Tennant , Antonino Tobia , Alessio Trois , Martin C. Weisskopf , Fei Xie
The class-transition Galactic X-ray binary IGR~J17091--3624 was simultaneously monitored by the \textit{IXPE} and \textit{NuSTAR} satellites. We present a detailed spectro-polarimetric study of the source using data from both satellites…
High Energy Astrophysical Phenomena · Physics
2025-07-15
Dipak Debnath , Subham Srimani , Hsiang-Kuang Chang
We present the first X-ray spectropolarimetric results for Cygnus X-1 in its soft state from a campaign of five IXPE observations conducted during 2023 May-June. Companion multiwavelength data during the campaign are likewise shown. The 2-8…
High Energy Astrophysical Phenomena · Physics
2024-06-19
James F. Steiner , Edward Nathan , Kun Hu , Henric Krawczynski , Michal Dovciak , Alexandra Veledina , Fabio Muleri , Jiri Svoboda , Kevin Alabarta , Maxime Parra , Yash Bhargava , Giorgio Matt , Juri Poutanen , Pierre-Olivier Petrucci , Allyn F. Tennant , M. Cristina Baglio , Luca Baldini , Samuel Barnier , Sudip Bhattacharyya , Stefano Bianchi , Maimouna Brigitte , Mauricio Cabezas , Floriane Cangemi , Fiamma Capitanio , Jacob Casey , Nicole Rodriguez Cavero , Simone Castellano , Elisabetta Cavazzuti , Sohee Chun , Eugene Churazov , Enrico Costa , Niccolo Di Lalla , Alessandro Di Marco , Elise Egron , Melissa Ewing , Sergio Fabiani , Javier A. Garcia , David A. Green , Victoria Grinberg , Petr Hadrava , Adam Ingram , Philip Kaaret , Fabian Kislat , Takao Kitaguchi , Vadim Kravtsov , Brankica Kubatova , Fabio La Monaca , Luca Latronico , Vladislav Loktev , Christian Malacaria , Frederic Marin , Andrea Marinucci , Olga Maryeva , Guglielmo Mastroserio , Tsunefumi Mizuno , Michela Negro , Nicola Omodei , Jakub Podgorny , John Rankin , Ajay Ratheesh , Lauren Rhodes , David M. Russell , Miroslav Slechta , Paolo Soffitta , Sean Spooner , Valery Suleimanov , Francesco Tombesi , Sergei A. Trushkin , Martin C. Weisskopf , Silvia Zane , Andrzej A. Zdziarski , Sixuan Zhang , Wenda Zhang , Menglei Zhou , Ivan Agudo , Lucio A. Antonelli , Matteo Bachetti , Wayne H. Baumgartner , Ronaldo Bellazzini , Stephen D. Bongiorno , Raffaella Bonino , Alessandro Brez , Niccolo Bucciantini , Chien-Ting Chen , Stefano Ciprini , Alessandra De Rosa , Ettore Del Monte , Laura Di Gesu , Immacolata Donnarumma , Victor Doroshenko , Steven R. Ehlert , Teruaki Enoto , Yuri Evangelista , Riccardo Ferrazzoli , Shuichi Gunji , Kiyoshi Hayashida , Jeremy Heyl , Wataru Iwakiri , Svetlana G. Jorstad , Vladimir Karas , Jeffery J. Kolodziejczak , Ioannis Liodakis , Simone Maldera , Alberto Manfreda , Alan P. Marscher , Herman L. Marshall , Francesco Massaro , Ikuyuki Mitsuishi , Chi-Yung Ng , Stephen L. O'Dell , Chiara Oppedisano , Alessandro Papitto , George G. Pavlov , Abel L. Peirson , Matteo Perri , Melissa Pesce-Rollins , Maura Pilia , Andrea Possenti , Simonetta Puccetti , Brian D. Ramsey , Oliver J. Roberts , Roger W. Romani , Carmelo Sgro , Patrick Slane , Gloria Spandre , Douglas A. Swartz , Toru Tamagawa , Fabrizio Tavecchio , Roberto Taverna , Yuzuru Tawara , Nicholas E. Thomas , Alessio Trois , Sergey S. Tsygankov , Roberto Turolla , Jacco Vink , Kinwah Wu , Fei Xie
The launch of IXPE telescope in late 2021 finally made polarization measurements in the 2-8 keV band a reality, more than 40 years after the pioneering observations of the OSO-8 satellite. In the first two years of operations IXPE targeted…
The X-ray polarization of Sco X-1 was measured for the first time with very high significance by the Imaging X-ray Polarimeter Explorer (IXPE). A polarization degree of 1.0% $\pm$ 0.2% at a PA of 8{\deg} $\pm$ 6{\deg} at 90% confidence…