Related papers: What's the Buzz About GX 13+1? Constraining Corona…

A second view on the X-ray polarization of NGC 4151 with IXPE

We report on the second observing program of the active galactic nucleus NGC 4151 with simultaneous Imaging X-ray Polarimetry Explorer (IXPE; {\sim}750 ks), NuSTAR ({\sim}60 ks), XMM-Newton ({\sim}75 ks), and NICER ({\sim}65 ks) pointings.…

High Energy Astrophysical Phenomena · Physics 2024-10-30 V. E. Gianolli , S. Bianchi , E. Kammoun , A. Gnarini , A. Marinucci , F. Ursini , M. Parra , A. Tortosa , A. De Rosa , D. E. Kim , F. Marin , G. Matt , R. Serafinelli , P. Soffitta , D. Tagliacozzo , L. Di Gesu , C. Done , H. L. Marshall , R. Middei , R. Mikusincova , P-O. Petrucci , S. Ravi , J. Svoboda , F. Tombesi

Context. In September 2022, the transient neutron star low-mass X-ray binary XTE J1701-462 went into a new outburst. Aims. The objective of this work is to examine the evolution of the accretion geometry of XTE J1701-462 by studying the…

High Energy Astrophysical Phenomena · Physics 2025-03-12 Wei Yu , Qingcui Bu , Victor Doroshenko , Lorenzo Ducci , Long Ji , Wenda Zhang , Andrea Santangelo , Shuangnan Zhang , Anand Waghmare , Mingyu Ge , Yue Huang , Hexin Liu , Lian Tao , Zixu Yang , Liang Zhang , Jinlu Qu

Fitting XMM-Newton Observations of the AXP 1RXS J170849.0-400910 with four magnetar surface emission models, and predictions for X-ray polarization observations with IXPE

Phase-resolved spectral and spectropolarimetric X-ray observations of magnetars present us with the opportunity to test models of the origin of the X-ray emission from these objects, and to constrain the properties of the neutron star…

High Energy Astrophysical Phenomena · Physics 2022-03-14 Henric Krawczynski , Roberto Taverna , Roberto Turolla , Sandro Mereghetti , Michela Rigoselli

Detection of significant X-ray polarization from transient NS-LMXB XTE J1701-462 with IXPE and its implication on the coronal geometry

In this paper, we performed a spectro-polarimetric analysis of the transient NS-LMXB XTE J1701-462 using IXPE, NICER, and NuSTAR data during its 2022 outburst. We report the significant detection of energy-dependent polarization in the…

High Energy Astrophysical Phenomena · Physics 2023-09-26 Kiran M. Jayasurya , Vivek K. Agrawal , Rwitika Chatterjee

The geometry of the hot corona in MCG-05-23-16 constrained by X-ray polarimetry

We report on the second observation of the radio-quiet active galactic nucleus (AGN) MCG-05-23-16 performed with the Imaging X-ray Polarimetry Explorer (IXPE). The observation started on 2022 November 6 for a net observing time of 640 ks,…

High Energy Astrophysical Phenomena · Physics 2023-05-18 D. Tagliacozzo , A. Marinucci , F. Ursini , G. Matt , S. Bianchi , L. Baldini , T. Barnouin , N. Cavero Rodriguez , A. De Rosa , L. Di Gesu , M. Dovciak , D. Harper , A. Ingram , V. Karas , D. E. Kim , H. Krawczynski , G. Madejski , F. Marin , R. Middei , H. L. Marshall , F. Muleri , C. Panagiotou , P. O. Petrucci , J. Podgorny , J. Poutanen , S. Puccetti , P. Soffitta , F. Tombesi , A. Veledina , W. Zhang , I. Agudo , L. A. Antonelli , M. Bachetti , W. H. Baumgartner , R. Bellazzini , S. D. Bongiorno , R. Bonino , A. Brez , N. Bucciantini , F. Capitanio , S. Castellano , E. Cavazzuti , C. T. Chen , S. Ciprini , E. Costa , E. Del Monte , N. Di Lalla , A. Di Marco , I. Donnarumma , V. Doroshenko , S. R. Ehlert , T. Enoto , Y. Evangelista , S. Fabiani , R. Ferrazzoli , J. A. Garcia , S. Gunji , J. Heyl , W. Iwakiri , S. G. Jorstad , P. Kaaret , F. Kislat , T. Kitaguchi , J. J. Kolodziejczak , F. La Monaca , L. Latronico , I. Liodakis , S. Maldera , A. Manfreda , A. P. Marscher , F. Massaro , I. Mitsuishi , T. Mizuno , M. Negro , C. Y. Ng , S. L. O'Dell , N. Omodei , C. Oppedisano , A. Papitto , G. G. Pavlov , A. L. Peirson , M. Perri , M. Pesce Rollins , M. Pilia , A. Possenti , B. D. Ramsey , J. Rankin , A. Ratheesh , O. J. Roberts , R. W. Romani , C. Sgrò , P. Slane , G. Spandre , D. A. Swartz , T. Tamagawa , F. Tavecchio , R. Taverna , Y. Tawara , A. F. Tennant , N. E. Thomas , A. Trois , S. S. Tsygankov , R. Turolla , J. Vink , M. C. Weisskopf , K. Wu , F. Xie , S. Zane

Discovery of Strong Energy-Dependent X-ray Polarization in the Intermediate State of GS 1354-64

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

Exploring polarization and geometry in the X-ray pulsar 4U 1538-52

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

Uncovering the geometry of the hot X-ray corona in the Seyfert galaxy NGC4151 with IXPE

We present an X-ray spectro-polarimetric analysis of the bright Seyfert galaxy NGC4151. The source has been observed with the Imaging X-ray Polarimetry Explorer (IXPE) for 700 ks, complemented with simultaneous XMM-Newton (50 ks) and NuSTAR…

Astrophysics of Galaxies · Physics 2023-06-12 V. E. Gianolli , D. E. Kim , S. Bianchi , B. Agís-González , G. Madejski , F. Marin , A. Marinucci , G. Matt , R. Middei , P-O. Petrucci , P. Soffitta , D. Tagliacozzo , F. Tombesi , F. Ursini , T. Barnouin , A. De Rosa , L. Di Gesu , A. Ingram , V. Loktev , C. Panagiotou , J. Podgorny , J. Poutanen , S. Puccetti , A. Ratheesh , A. Veledina , W. Zhang , I. Agudo , L. A. Antonelli , M. Bachetti , L. Baldini , W. H. Baumgartner , R. Bellazzini , S. D. Bongiorno , R. Bonino , A. Brez , N. Bucciantini , F. Capitanio , S. Castellano , E. Cavazzuti , C. -T. Chen , S. Ciprini , E. Costa , E. Del Monte , 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. García , S. Gunji , J. Heyl , W. Iwakiri , S. G. Jorstad , P. Kaaret , V. Karas , F. Kislat , T. Kitaguchi , J. J. Kolodziejczak , H. Krawczynski , F. La Monaca , L. Latronico , I. Liodakis , S. Maldera , A. Manfreda , A. P. Marscher , H. L. Marshall , F. Massaro , I. Mitsuishi , T. Mizuno , F. Muleri , M. Negro , C. -Y. Ng , S. L. ODell , N. Omodei , C. Oppedisano , A. Papitto , G. G. Pavlov , A. L. Peirson , M. Perri , M. Pesce-Rollins , M. Pilia , A. Possenti , B. D. Ramsey , J. Rankin , O. J. Roberts , R. W. Romani , C. Sgrò , P. Slane , G. Spandre , D. A. Swartz , T. Tamagawa , F. Tavecchio , R. Taverna , Y. Tawara , A. F. Tennant , N. E. Thomas , A. Trois , S. S. Tsygankov , R. Turolla , J. Vink , M. C. Weisskopf , K. Wu , F. Xie , S. Zane

Determination of X-ray pulsar geometry with IXPE polarimetry

Using observations of X-ray pulsar Her X-1 by the Imaging X-ray Polarimetry Explorer, we report on a highly significant ($>17\sigma$) detection of the polarization signal from an accreting neutron star. The observed degree of the linear…

High Energy Astrophysical Phenomena · Physics 2023-01-16 Victor Doroshenko , Juri Poutanen , Sergey S. Tsygankov , Valery F. Suleimanov , Matteo Bachetti , Ilaria Caiazzo , Enrico Costa , Alessandro Di Marco , Jeremy Heyl , Fabio La Monaca , Fabio Muleri , Alexander A. Mushtukov , George G. Pavlov , Brian D. Ramsey , John Rankin , Andrea Santangelo , Paolo Soffitta , Rüdiger Staubert , Martin C. Weisskopf , Silvia Zane , Iván Agudo , Lucio A. Antonelli , Luca Baldini , Wayne H. Baumgartner , Ronaldo Bellazzini , Stefano Bianchi , Stephen D. Bongiorno , Raffaella Bonino , Alessandro Brez , Niccolò Bucciantini , Fiamma Capitanio , Simone Castellano , Elisabetta Cavazzuti , Stefano Ciprini , Alessandra De Rosa , Ettore Del Monte , Laura Di Gesu , Niccolò Di Lalla , Immacolata Donnarumma , Michal Dovciak , Steven R. Ehlert , Teruaki Enoto , Yuri Evangelista , Sergio Fabiani , Riccardo Ferrazzoli , Javier A. Garcia , Shuichi Gunji , Kiyoshi Hayashida , Wataru Iwakiri , Svetlana G. Jorstad , Vladimir Karas , Takao Kitaguchi , Jeffery J. Kolodziejczak , Henric Krawczynski , Luca Latronico , Ioannis Liodakis , Simone Maldera , Alberto Manfreda , Frédéric Marin , Andrea Marinucci , Alan P. Marscher , Herman L. Marshall , Giorgio Matt , Ikuyuki Mitsuishi , Tsunefumi Mizuno , C. -Y. Ng , Stephen L. O'Dell , Nicola Omodei , Chiara Oppedisano , Alessandro Papitto , Abel L. Peirson , Matteo Perri , Melissa Pesce-Rollins , Maura Pilia , Andrea Possenti , Simonetta Puccetti , Ajay Ratheesh , Roger W. Romani , Carmelo Sgrò , Patrick Slane , Gloria Spandre , Rashid A. Sunyaev , Toru Tamagawa , Fabrizio Tavecchio , Roberto Taverna , Yuzuru Tawara , Allyn F. Tennant , Nicolas E. Thomas , Francesco Tombesi , Alessio Trois , Roberto Turolla , Jacco Vink , Kinwah Wu , Fei Xie

Probing the polarized emission from SMC X-1: the brightest X-ray pulsar observed by IXPE

Recent observations of X-ray pulsars (XRPs) performed by the Imaging X-ray Polarimetry Explorer (IXPE) have made it possible to investigate the intricate details of these objects in a new way, thanks to the added value of X-ray polarimetry.…

High Energy Astrophysical Phenomena · Physics 2024-11-20 Sofia V. Forsblom , Sergey S. Tsygankov , Juri Poutanen , Victor Doroshenko , Alexander A. Mushtukov , Mason Ng , Swati Ravi , Herman L. Marshall , Alessandro Di Marco , Fabio La Monaca , Christian Malacaria , Guglielmo Mastroserio , Vladislav Loktev , Andrea Possenti , Valery F. Suleimanov , Roberto Taverna , Ivan Agudo , Lucio A. Antonelli , Matteo Bachetti , Luca Baldini , Wayne H. Baumgartner , Ronaldo Bellazzini , Stefano Bianchi , Stephen D. Bongiorno , Raffaella Bonino , Alessandro Brez , Niccolo Bucciantini , Fiamma Capitanio , Simone Castellano , Elisabetta Cavazzuti , Chien-Ting Chen , Stefano Ciprini , Enrico Costa , Alessandra De Rosa , Ettore Del Monte , Laura Di Gesu , Niccolo Di Lalla , Immacolata Donnarumma , Michal Dovciak , Steven R. Ehlert , Teruaki Enoto , Yuri Evangelista , Sergio Fabiani , Riccardo Ferrazzoli , Javier A. Garcia , Shuichi Gunji , Kiyoshi Hayashida , Jeremy Heyl , Wataru Iwakiri , Svetlana G. Jorstad , Philip Kaaret , Vladimir Karas , Fabian Kislat , Takao Kitaguchi , Jeffery J. Kolodziejczak , Henric Krawczynski , Luca Latronico , Ioannis Liodakis , Simone Maldera , Alberto Manfreda , Frederic Marin , Andrea Marinucci , Alan P. Marscher , 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 , Matteo Perri , Melissa Pesce-Rollins , Pierre-Olivier Petrucci , Maura Pilia , Simonetta Puccetti , Brian D. Ramsey , John Rankin , Ajay Ratheesh , Oliver J. Roberts , Roger W. Romani , Carmelo Sgro , Patrick Slane , Paolo Soffitta , Gloria Spandre , Douglas A. Swartz , Toru Tamagawa , Fabrizio Tavecchio , Yuzuru Tawara , Allyn F. Tennant , Nicholas E. Thomas , Francesco Tombesi , Alessio Trois , Roberto Turolla , Jacco Vink , Martin C. Weisskopf , Kinwah Wu , Fei Xie , Silvia Zane

XIPE: the X-ray Imaging Polarimetry Explorer

X-ray polarimetry, sometimes alone, and sometimes coupled to spectral and temporal variability measurements and to imaging, allows a wealth of physical phenomena in astrophysics to be studied. X-ray polarimetry investigates the acceleration…

High Energy Astrophysical Phenomena · Physics 2016-08-11 Paolo Soffitta , Xavier Barcons , Ronaldo Bellazzini , João Braga , Enrico Costa , George W. Fraser , Szymon Gburek , Juhani Huovelin , Giorgio Matt , Mark Pearce , Juri Poutanen , Victor Reglero , Andrea Santangelo , Rashid A. Sunyaev , Gianpiero Tagliaferri , Martin Weisskopf , Roberto Aloisio , Elena Amato , Primo Attiná , Magnus Axelsson , Luca Baldini , Stefano Basso , Stefano Bianchi , Pasquale Blasi , Johan Bregeon , Alessandro Brez , Niccoló Bucciantini , Luciano Burderi , Vadim Burwitz , Piergiorgio Casella , Eugene Churazov , Marta Civitani , Stefano Covino , Rui Miguel Curado da Silva , Giancarlo Cusumano , Mauro Dadina , Flavio D'Amico , Alessandra De Rosa , Sergio Di Cosimo , Giuseppe Di Persio , Tiziana Di Salvo , Michal Dovciak , Ronald Elsner , Chris J. Eyles , Andrew C. Fabian , Sergio Fabiani , Hua Feng , Salvatore Giarrusso , René W. Goosmann , Paola Grandi , Nicolas Grosso , Gianluca Israel , Miranda Jackson , Philip Kaaret , Vladimir Karas , Michael Kuss , Dong Lai , Giovanni La Rosa , Josefin Larsson , Stefan Larsson , Luca Latronico , Antonio Maggio , Jorge Maia , Frédéric Marin , Marco Maria Massai , Teresa Mineo , Massimo Minuti , Elena Moretti , Fabio Muleri , Stephen L. O'Dell , Giovanni Pareschi , Giovanni Peres , Melissa Pesce , Pierre-Olivier Petrucci , Michele Pinchera , Delphine Porquet , Brian Ramsey , Nanda Rea , Fabio Reale , Juana Maria Rodrigo , Agata Różańska , Alda Rubini , Pawel Rudawy , Felix Ryde , Marco Salvati , Valdivino Alexandre de Santiago Júnior , Sergey Sazonov , Carmelo Sgró , Eric Silver , Gloria Spandre , Daniele Spiga , Luigi Stella , Toru Tamagawa , Francesco Tamborra , Fabrizio Tavecchio , Teresa Teixeira Dias , Matthew van Adelsberg , Kinwah Wu , Silvia Zane

Unbinned Likelihood Analysis for X-ray Polarization

We present a systematic study of the unbinned, photon-by-photon likelihood technique which can be used as an alternative method to analyse phase-dependent, X-ray spectro-polarimetric observations obtained with IXPE and other photo-electric…

Instrumentation and Methods for Astrophysics · Physics 2023-01-25 Denis González-Caniulef , Ilaria Caiazzo , Jeremy Heyl

IXPE Detection of Polarized X-rays from Magnetars and Photon Mode Conversion at QED Vacuum Resonance

The recent observations of the anomalous X-ray pulsars 4U 0142+61 and 1RXS J170849.0-400910 by the Imaging X-ray Polarimetry Explorer (IXPE) opened up a new avenue to study magnetars, neutron stars endowed with superstrong magnetic fields…

High Energy Astrophysical Phenomena · Physics 2023-05-24 Dong Lai

XMM-Newton observation of V1504 Cyg as a probe for the existence of an evaporated corona

AIMS: We present an analysis of an XMM-Newton observation of the dwarf novae V1504 Cyg during the decline from an outburst. Our goal is to search for evidence for an evaporated X-ray corona. Such a corona can be understood as an optically…

Solar and Stellar Astrophysics · Physics 2023-06-28 A. Dobrotka , J. -U. Ness , A. A. Nucita , M. Melicherčík

Limits on X-ray Polarization at the Core of Centaurus A as Observed with the Imaging X-ray Polarimetry Explorer

We present measurements of the polarization of X-rays in the $2-8 \thinspace \mathrm{keV}$ band from the nucleus of the radio galaxy Centaurus A (Cen A), using a 100ks observation from the Imaging X-ray Polarimetry Explorer (IXPE). Nearly…

High Energy Astrophysical Phenomena · Physics 2022-08-31 Steven R. Ehlert , Riccardo Ferrazzoli , Andrea Marinucci , Herman L. Marshall , Riccardo Middei , Luigi Pacciani , Matteo Perri , Pierre-Olivier Petrucci , Simonetta Puccetti , Thibault Barnouin , Stefano Bianchi , Ioannis Liodakis , Grzegorz Madejski , Fréderic Marin , Alan P. Marscher , Giorgio Matt , Juri Poutanen , Kinwah Wu , 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 , Stefano Ciprini , Enrico Costa , Alessandra De Rosa , Ettore Del Monte , Laura Di Gesu , Niccolò Di Lalla , Alessandro Di Marco , Immacolata Donnarumma , Victor Doroshenko , Michal Dovčiak , Teruaki Enoto , Yuri Evangelista , Sergio Fabiani , Javier A. Garcia , Shuichi Gunji , Kiyoshi Hayashida , Jeremy Heyl , Wataru Iwakiri , Svetlana G. Jorstad , Vladimir Karas , Takao Kitaguchi , Jeffery J. Kolodziejczak , Henric Krawczynski , Fabio La Monaca , Luca Latronico , Simone Maldera , Alberto Manfreda , Francesco Massaro , Ikuyuki Mitsuishi , Tsunefumi Mizuno , Fabio Muleri , Michela Negro , C. -Y. Ng , Stephen L. O'Dell , Nicola Omodei , Chiara Oppedisano , Alessandro Papitto , George G. Pavlov , Abel L. Peirson , Melissa Pesce-Rollins , Maura Pilia , Andrea Possenti , Brian D. Ramsey , John Rankin , Ajay Ratheesh , Roger W. Romani , Carmelo Sgrò , Patrick Slane , Paolo Soffitta , Gloria Spandre , Toru Tamagawa , Fabrizio Tavecchio , Roberto Taverna , Yuzuru Tawara , Allyn F. Tennant , Nicholas E. Thomas , Francesco Tombesi , Alessio Trois , Sergey Tsygankov , Roberto Turolla , Jacco Vink , Martin C. Weisskopf , Fei Xie , Silvia Zane , James Rodi , Elisabeth Jourdain , Jean-Pierre Roques

Polarization properties of the weakly magnetized neutron star X-ray binary GS 1826-238 in the high soft state

The launch of the Imaging X-ray Polarimetry Explorer (IXPE) on 2021 December 9 has opened a new window in X-ray astronomy. We report here the results of the first IXPE observation of a weakly magnetized neutron star, GS 1826-238, performed…

High Energy Astrophysical Phenomena · Physics 2023-02-08 Fiamma Capitanio , Sergio Fabiani , Andrea Gnarini , Francesco Ursini , Carlo Ferrigno , Giorgio Matt , Juri Poutanen , Massimo Cocchi , Romana Mikusincova , Ruben Farinelli , Stefano Bianchi , Jari J. E. Kajava , Fabio Muleri , Celia Sanchez-Fernandez , Paolo Soffitta , Kinwah Wu , Ivan Agudo , Lucio A. Antonelli , Matteo Bachetti , Luca Baldini , Wayne H. Baumgartner , Ronaldo Bellazzini , Stephen D. Bongiorno , Raffaella Bonino , Alessandro Brez , Niccoló Bucciantini , Simone Castellano , Elisabetta Cavazzuti , Stefano Ciprini , Enrico Costa , Alessandra De Rosa , Ettore Del Monte , Laura Di Gesu , Niccolo Di Lalla , Alessandro Di Marco , Immacolata Donnarumma , Victor Doroshenko , Michal Dovciak , Steven R. Ehlert , Teruaki Enoto , Yuri Evangelista , Riccardo Ferrazzoli , Javier A. Garcia , Shuichi Gunji , Kiyoshi Hayashida , Jeremy Heyl , Wataru Iwakiri , Svetlana G. Jorstad , Vladimir Karas , Takao Kitaguchi , Jeffery J. Kolodziejczak , Henric Krawczynski , Fabio La Monaca , Luca Latronico , Ioannis Liodakis , Simone Maldera , Alberto Manfreda , Fréedèric Marin , Andrea Marinucci , Alan P. Marscher , Herman L. Marshall , Ikuyuki Mitsuishi , Tsunefumi Mizuno , 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 , Simonetta Puccetti , Brian D. Ramsey , John Rankin , Ajay Ratheesh , Roger W. Romani , Carmelo Sgrò , Patrick Slane , Gloria Spandre , 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

A relativistic outflow model of the X-ray polarization in Cyg X-1

We propose that the polarization of the emission from the X-ray binary Cygnus X-1, measured using the Imaging X-ray Polarimetry Explorer (IXPE), is imprinted by bulk Comptonization of coronal emission in a mildly relativistic wind or jet…

High Energy Astrophysical Phenomena · Physics 2023-08-07 Jason Dexter , Mitchell C. Begelman

X-ray Polarization of the High-Synchrotron-Peak BL Lacertae Object 1ES 1959+650 during Intermediate and High X-ray Flux States

We report the Imaging X-ray Polarimetry Explorer (IXPE) polarimetric and simultaneous multiwavelength observations of the high-energy-peaked BL Lacertae (HBL) object 1ES 1959+650, performed in 2022 October and 2023 August. In 2022 October…

High Energy Astrophysical Phenomena · Physics 2025-03-28 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 , Giacomo Bonnoli , Pouya M. Kouch , 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 , Jeremy Heyl , Wataru Iwakiri , Philip Kaaret , Vladimir Karas , Fabian Kislat , Jeffery J. Kolodziejczak , Henric Krawczynski , Fabio La Monaca , Luca Latronico , Simone Maldera , Alberto Manfreda , Frédéric Marin , Andrea Marinucci , Giorgio Matt , 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 , Allyn F. Tennant , Nicholas E. Thomas , Francesco Tombesi , Alessio Trois , Sergey S. Tsygankov , Roberto Turolla , Jacco Vink , Martin C. Weisskopf , Fei Xie , Silvia Zane

A polarimetrically oriented X-ray stare at the accreting pulsar EXO 2030+375

Accreting X-ray pulsars (XRPs) are presumably ideal targets for polarization measurements, as their high magnetic field strength is expected to polarize the emission up to a polarization degree of ~80%. However, such expectations are being…

High Energy Astrophysical Phenomena · Physics 2023-07-12 Christian Malacaria , Jeremy Heyl , Victor Doroshenko , Sergey S. Tsygankov , Juri Poutanen , Sofia V. Forsblom , Fiamma Capitanio , Alessandro Di Marco , Yujia Du , Lorenzo Ducci , Fabio La Monaca , Alexander A. Lutovinov , Herman L. Marshall , Ilya A. Mereminskiy , Sergey V. Molkov , Mason Ng , Pierre-Olivier Petrucci , Andrea Santangelo , Andrey E. Shtykovsky , Valery F. Suleimanov , Ivan Agudo , Lucio A. Antonelli , Matteo Bachetti , Luca Baldini , Wayne H. Baumgartner , Ronaldo Bellazzini , Stefano Bianchi , Stephen D. Bongiorno , Raffaella Bonino , Alessandro Brez , Niccolo Bucciantini , Simone Castellano , Elisabetta Cavazzuti , Chien-Ting Chen , Stefano Ciprini , Enrico Costa , Alessandra De Rosa , Ettore Del Monte , Laura Di Gesu , Niccolo Di Lalla , Immacolata Donnarumma , Michal Dovciak , Steven R. Ehlert , Teruaki Enoto , Yuri Evangelista , Sergio Fabiani , Riccardo Ferrazzoli , Javier A. Garcia , Shuichi Gunji , Kiyoshi Hayashida , Wataru Iwakiri , Svetlana G. Jorstad , Philip Kaaret , Vladimir Karas , Fabian Kislat , Takao Kitaguchi , Jeffery J. Kolodziejczak1 , Henric Krawczynski , Luca Latronico , Ioannis Liodakis , Simone Maldera , Alberto Manfreda , Frederic Marin , Andrea Marinucci , Alan P. Marscher , 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 , Matteo Perri , Melissa Pesce-Rollins , Maura Pilia , Andrea Possenti , Simonetta Puccetti , Brian D. Ramsey , John Rankin , Ajay Ratheesh , Oliver J. Roberts , Roger W. Romani , Carmelo Sgro , 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 , Roberto Turolla , Jacco Vink , Martin C. Weisskopf , Kinwah Wu , Fei Xie , Silvia Zane

Energy-resolved polarisation study of the Crab Nebula with IXPE

This work presents a new detailed study on the energy-dependent variation in the X-ray polarisation of the Crab Pulsar Wind Nebula (PWN), obtained using data from the Imaging X-ray Polarimetry Explorer (IXPE). For the entire PWN, we…

High Energy Astrophysical Phenomena · Physics 2025-04-15 Wenhao Wei , Fei Xie , Fabio La Monaca , Wei Deng , Mingyu Ge , Kuan Liu , Chao Zuo , Wei Chen