Related papers
Related papers: Sco X-1 as seen by IXPE
200 papers
Highly Significant Detection of X-Ray Polarization from the Brightest Accreting Neutron Star Sco X-1
The Imaging X-ray Polarimetry Explorer (IXPE) measured with high significance the X-ray polarization of the brightest Z-source Scorpius X-1, resulting in the nominal 2-8 keV energy band in a polarization degree of 1.0(0.2)% and a…
High Energy Astrophysical Phenomena · Physics
2024-01-25
Fabio La Monaca , Alessandro Di Marco , Juri Poutanen , Matteo Bachetti , Sara E. Motta , Alessandro Papitto , Maura Pilia , Fei Xie , Stefano Bianchi , Anna Bobrikova , Enrico Costa , Wei Deng , Mingyu Ge , Giulia Illiano , Shu-Mei Jia , Henric Krawczynski , Eleonora V. Lai , Kuan Liu , Guglielmo Mastroserio , Fabio Muleri , John Rankin , Paolo Soffitta , Alexandra Veledina , Filippo Ambrosino , Melania Del Santo , Wei Chen , Javier A. Garcia , Philip Kaaret , Thomas D. Russell , Wen-Hao Wei , Shuang-Nan Zhang , Chao Zuo , Zaven Arzoumanian , Massimo Cocchi , Andrea Gnarini , Ruben Farinelli , Keith C. Gendreau , Francesco Ursini , Martin C. Weisskopf , Silvia Zane , Ivan Agudo , Lucio Angelo Antonelli , Luca Baldini , Wayne H. Baumgartner , Ronaldo Bellazzini , Stephen D. Bongiorno , Raffaella Bonino , Alessandro Brez , Niccolò Bucciantini , Fiamma Capitanio , Simone Castellano , Elisabetta Cavazzuti , Chien-Ting J. Chen , Stefano Ciprini , Alessandra De Rosa , Ettore Del Monte , Laura Di Gesu , Niccolò Di Lalla , Immacolata Donnarumma , Victor Doroshenko , Michal Dovciak , Steven R. Ehlert , Teruaki Enoto , Yuri Evangelista , Sergio Fabiani , Riccardo Ferrazzoli , Shuichi Gunji , Kiyoshi Hayashidadag , Jeremy Heyl , Wataru Iwakiri , Svetlana G. Jorstad , Vladimir Karas , Fabian Kislat , Takao Kitaguchi , Jeffery J. Kolodziejczak , Luca Latronico , Ioannis Liodakis , Simone Maldera , Alberto Manfreda , Fre'de'ric Marin , Andrea Marinucci , Alan P. Marscher , Herman L. Marshall , Francesco Massaro , Giorgio Matt , Ikuyuki Mitsuishi , Tsunefumi Mizuno , Michela Negro , Stephen Chi-Yung Ng , Stephen L. O'Dell , Nicola Omodei , Chiara Oppedisano , George Pavlov , Abel L. Peirson , Matteo Perri , Melissa Pesce-Rollins , Pierre-Olivier Petrucci , Andrea Possenti , Simonetta Puccetti , Brian Ramsey , Ajay Ratheesh , Oliver J. Roberts , Roger W. Romani , Carmelo Sgrò , Patrick Slane , Gloria Spandre , Douglas A. Swartz , Toru Tamagawa , Fabrizio Tavecchio , Roberto Taverna , Yuzuru Tawara , Allyn F. Tennant , Nicholas Thomas , Francesco Tombesi , Alessio Trois , Sergey S. Tsygankov , Roberto Turolla , Jacco Vink , Kinwah Wu
The incoming Imaging X-ray Polarimetry Explorer (IXPE) observations of X-ray binaries provide a new tool to investigate the underlying accretion geometry. Here we report the first measurements of X-ray polarization of the extra-galactic…
We report on an X-ray polarimetric observation of the high-mass X-ray binary LMC X-1 in the high/soft state, obtained by the Imaging X-ray Polarimetry Explorer (IXPE) in October 2022. The measured polarization is below the minimum…
High Energy Astrophysical Phenomena · Physics
2023-10-10
Jakub Podgorny , Lorenzo Marra , Fabio Muleri , Nicole Rodriguez Cavero , Ajay Ratheesh , Michal Dovciak , Romana Mikusincova , Maimouna Brigitte , James F. Steiner , Alexandra Veledina , Stefano Bianchi , Henric Krawczynski , Jiri Svoboda , Philip Kaaret , Giorgio Matt , Javier A. Garcia , Pierre-Olivier Petrucci , Alexander A. Lutovinov , Andrey N. Semena , Alessandro Di Marco , Michela Negro , Martin C. Weisskopf , Adam Ingram , Juri Poutanen , Banfsheh Beheshtipour , Sohee Chun , Kun Hu , Tsunefumi Mizuno , Zhang Sixuan , Francesco Tombesi , Silvia Zane , Ivan Agudo , Lucio A. Antonelli , Matteo Bachetti , Luca Baldini , Wayne H. Baumgartner , Ronaldo Bellazzini , 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 , 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 , Fabio La Monaca , Luca Latronico , Ioannis Liodakis , Simone Maldera , Alberto Manfreda , Frederic Marin , Andrea Marinucci , Alan P. Marscher , Herman L. Marshall , Francesco Massaro , Ikuyuki Mitsuishi , 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 Sgro , Patrick Slane , Paolo Soffitta , Gloria Spandre , Doug 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 , Kinwah Wu , Fei Xie
We present simultaneous X-ray polarimetric and spectral observations of the bright atoll source Ser~X-1 carried out with the Imaging X-ray Polarimetry Explorer (IXPE), NICER, and NuSTAR. We obtain an upper limit of 2% (99% confidence level)…
High Energy Astrophysical Phenomena · Physics
2024-08-30
F. Ursini , A. Gnarini , S. Bianchi , A. Bobrikova , F. Capitanio , M. Cocchi , S. Fabiani , R. Farinelli , P. Kaaret , G. Matt , M. Ng , J. Poutanen , S. Ravi , A. Tarana
We present a detailed spectropolarimetric study of the Sco-like Z-source GX 349+2, simultaneously observed with the Imaging X-ray Polarimetry Explorer (IXPE) and Nuclear Spectroscopic Telescope Array (NuSTAR). During the observations GX…
High Energy Astrophysical Phenomena · Physics
2025-10-01
Fabio La Monaca , Anna Bobrikova , Juri Poutanen , Francesco Coti Zelati , Maura Pilia , Alexandra Veledina , Matteo Bachetti , Vladislav Loktev , Fei Xie
We report on the discovery of polarized X-ray emission from an accreting millisecond pulsar. During a 10-day-long coverage of the February 2024 outburst of SRGA J144459.2-604207, the Imaging X-ray Polarimetry Explorer (IXPE) detected an…
High Energy Astrophysical Phenomena · Physics
2025-02-05
Alessandro Papitto , Alessandro Di Marco , Juri Poutanen , Tuomo Salmi , Giulia Illiano , Fabio La Monaca , Filippo Ambrosino , Anna Bobrikova , Maria Cristina Baglio , Caterina Ballocco , Luciano Burderi , Sergio Campana , Francesco Coti Zelati , Tiziana Di Salvo , Riccardo La Placa , Vladislav Loktev , Sinan Long , Christian Malacaria , Arianna Miraval Zanon , Mason Ng , Maura Pilia , Andrea Sanna , Luigi Stella , Tod Strohmayer , Silvia Zane
We report the detection of X-ray polarization in the neutron star low mass X-ray binary Scorpius (Sco) X-1 with PolarLight. The result is energy dependent, with a non-detection in 3-4 keV but a 4$\sigma$ detection in 4-8 keV; it is also…
High Energy Astrophysical Phenomena · Physics
2022-01-07
Xiangyun Long , Hua Feng , Hong Li , Jiahuan Zhu , Qiong Wu , Jiahui Huang , Massimo Minuti , Weichun Jiang , Dongxin Yang , Saverio Citraro , Hikmat Nasimi , Jiandong Yu , Ge Jin , Ming Zeng , Peng An , Jiachen Jiang , Enrico Costa , Luca Baldini , Ronaldo Bellazzini , Alessandro Brez , Luca Latronico , Carmelo Sgro , Gloria Spandre , Michele Pinchera , Fabio Muleri , Paolo Soffitta
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
The radiation from accreting X-ray pulsars was expected to be highly polarized, with some estimates for the polarization degree of up to 80%. However, phase-resolved and energy-resolved polarimetry of X-ray pulsars is required in order to…
High Energy Astrophysical Phenomena · Physics
2023-04-26
Sofia V. Forsblom , Juri Poutanen , Sergey S. Tsygankov , Matteo Bachetti , Alessandro Di Marco , Victor Doroshenko , Jeremy Heyl , Fabio La Monaca , Christian Malacaria , Herman L. Marshall , Fabio Muleri , Alexander A. Mushtukov , Maura Pilia , Daniele Rogantini , Valery F. Suleimanov , Roberto Taverna , Fei Xi , 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 , Chien-Ting Chen , Stefano Ciprini , Enrico Costa , Alessandra De Rosa , Ettore Del Monte , Laura Di Gesu , Niccolò Di Lalla , Immacolata Donnarumma , Michal Dovčiak , 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 , Takao Kitaguchi , Jeffery J. Kolodziejczak , Henric Krawczynski , Luca Latronico , Ioannis Liodakis , Simone Maldera , Alberto Manfreda , Frédéric Marin , Andrea Marinucci , Alan P. Marscher , Giorgio Matt , 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 , Pierre-Olivier Petrucci , Andrea Possenti , Simonetta Puccetti , Brian D. Ramsey , John Rankin , Ajay Ratheesh , Oliver J. Roberts , Roger W. Romani , Carmelo Sgrò , Patrick Slane , Paolo Soffitta , Gloria Spandre , Rashid A. Sunyaev , Doug 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 , Silvia Zane
We present the first X-ray polarimetric observation of the extreme high-synchrotron-peaked blazar 1ES 1101--232, conducted by the Imaging X-ray Polarimetry Explorer (IXPE). The data analysis incorporates simultaneous and quasi-simultaneous…
High Energy Astrophysical Phenomena · Physics
2025-12-11
Xin-Ke Hu , Jin Zhang , Fei Xie , Xiang-Gao Wang
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
We conduct a spectro-polarimetric study of the accreting X-ray pulsar Hercules X-1 using observations with the Imaging X-ray Polarimetry Explorer (IXPE). IXPE monitored the source in three different Epochs, sampling two Main-on and one…
High Energy Astrophysical Phenomena · Physics
2023-07-31
Akash Garg , Divya Rawat , Yash Bhargava , Mariano Méndez , Sudip Bhattacharyya
We present polarization measurements in the $2-8 \thinspace \mathrm{keV}$ band from blazar 1ES 0229+200, the first extreme high synchrotron peaked source to be observed by the Imaging X-ray Polarimetry Explorer (IXPE). Combining two…
High Energy Astrophysical Phenomena · Physics
2023-10-04
Steven R. Ehlert , Ioannis Liodakis , Riccardo Middei , Alan P. Marscher , Fabrizio Tavecchio , Iván Agudo , Pouya M. Kouch , Elina Lindfors , Kari Nilsson , Ioannis Myserlis , Mark Gurwell , Ramprasad Rao , Francisco Jose Aceituno , Giacomo Bonnoli , Victor Casanova , Beatriz Agiz-Gonzalez , Juan Escudero , Jorge Otero Santos , Alfredo Sota , Emmanouil Angelakis , Alexander Kraus , Garrett K. Keating , 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 , Laura Di Gesu , Niccolò Di Lalla , Alessandro Di Marco , 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 , Svetlana G. Jorstad , 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 , 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 , 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 , Roger W. Romani , Carmelo Sgro , 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
Observations of linear polarization in the 2-8 keV energy range with the Imaging X-ray Polarimetry Explorer (IXPE) explore the magnetic field geometry and dynamics of the regions generating non-thermal radiation in relativistic jets of…
High Energy Astrophysical Phenomena · Physics
2024-02-26
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 , 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
Z-sources are a particular class of neutron star low-mass X-ray binaries characterized by a wide Z-like track in their hard colorsoft color (or hardness-intensity) diagrams, with three branches: the horizontal (HB), the normal (NB), and the…
High Energy Astrophysical Phenomena · Physics
2025-07-02
Andrea Gnarini , Francesco Ursini , Giorgio Matt , Stefano Bianchi , Fiamma Capitanio , Massimo Cocchi , Sergio Fabiani , Ruben Farinelli , Antonella Tarana
We report the first detection of the X-ray polarisation of the transient black hole X-ray binary IGRJ17091-3624 taken with the Imaging X-ray polarimetry Explorer (IXPE) in March 2025, and present the results of an X-ray spectro-polarimetric…
High Energy Astrophysical Phenomena · Physics
2025-05-26
Melissa Ewing , Maxime Parra , Guglielmo Mastroserio , Alexandra Veledina , Adam Ingram , Michal Dovčiak , Javier A. García , Thomas D. Russell , Maria C. Baglio , Juri Poutanen , Oluwashina Adegoke , Stefano Bianchi , Fiamma Capitanio , Riley Connors , Melania Del Santo , Barbara De Marco , María Díaz Trigo , Poshak Gandhi , Maitrayee Gupta , Chulsoo Kang , Elias Kammoun , Vladislav Loktev , Lorenzo Marra , Giorgio Matt , Edward Nathan , Pierre-Olivier Petrucci , Megumi Shidatsu , James F. Steiner , Francesco Tombesi
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
Scorpius X-1 is the brightest and first discovered X-ray source in the sky. Studying this source in the low-energy band has been challenging in the past due to its high brightness. However, with the X-ray SPECtroscopy and Timing (XSPECT)…
High Energy Astrophysical Phenomena · Physics
2025-10-06
V. P. Shyam Prakash , Vivek K. Agrawal , Rwitika Chatterjee , Radhakrishna Vatedka , Koushal Vadodariya , A. M. Vinodkumar
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 X-ray polarization observations made possible with the Imaging X-ray Polarimetry Explorer (IXPE) offer new ways of probing high-energy emission processes in astrophysical jets from blazars. Here we report on the first X-ray polarization…
High Energy Astrophysical Phenomena · Physics
2025-03-12
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 , 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