Discovery of X-Ray Polarization from the Black Hole Transient Swift J1727.8-1613
Veledina Alexandra; Muleri Fabio; Dovciak Michal; Poutanen Juri; Ratheesh Ajay; Capitanio Fiamma; Matt Giorgio; Soffitta Paolo; Tennant Allyn F.; Negro Michela; Kaaret Philip; Costa Enrico; Ingram Adam; Svoboda Jiri; Krawczynski Henric; Bianchi Stefano; Steiner James F.; Garcia Javier A.; Kravtsov Vadim; Nitindala Anagha P.; Ewing Melissa; Mastroserio Guglielmo; Marinucci Andrea; Ursini Francesco; Tombesi Francesco; Tsygankov Sergey S.; Yang Yi-Jung; Weisskopf Martin C.; Trushkin Sergei A.; Egron Elise; Iacolina Maria Noemi; Pilia Maura; Marra Lorenzo; Mikusincova Romana; Nathan Edward; Parra Maxime; Petrucci Pierre-Olivier; Podgorny Jakub; Tugliani Stefano; Zane Silvia; Zhang Wenda; Agudo Ivan; Antonelli Lucio A.; Bachetti Matteo; Baldini Luca; Baumgartner Wayne H.; Bellazzini Ronaldo; Bongiorno Stephen D.; Bonino Raffaella; Brez Alessandro; Bucciantini Niccolo; Castellano Simone; Cavazzuti Elisabetta; Chen Chien-Ting; Ciprini Stefano; De Rosa Alessandra; Del Monte Ettore; Di Gesu Laura; Di Lalla Niccolo; Di Marco Alessandro; Donnarumma Immacolata; Doroshenko Victor; Ehlert Steven R.; Enoto Teruaki; Evangelista Yuri; Fabiani Sergio; Ferrazzoli Riccardo; Gunji Shuichi; Hayashida Kiyoshi; Heyl Jeremy; Iwakiri Wataru; Jorstad Svetlana G.; Karas Vladimir; Kislat Fabian; Kitaguchi Takao; Kolodziejczak Jeffery J.; La Monaca Fabio; Latronico Luca; Liodakis Ioannis; Maldera Simone; Manfreda Alberto; Marin Frederic; Marscher Alan P.; Marshall Herman L.; Massaro Francesco; Mitsuishi Ikuyuki; Mizuno Tsunefumi; Ng Chi-Yung; O'Dell Stephen L.; Omodei Nicola; Oppedisano Chiara; Papitto Alessandro; Pavlov George G.; Peirson Abel L.; Perri Matteo; Pesce-Rollins Melissa; Possenti Andrea; Puccetti Simonetta; Ramsey Brian D.; Rankin John; Roberts Oliver J.; Romani Roger W.; Sgro Carmelo; Slane Patrick; Spandre Gloria; Swartz Douglas A.; Tamagawa Toru; Tavecchio Fabrizio; Taverna Roberto; Tawara Yuzuru; Thomas Nicholas E.; Trois Alessio; Turolla Roberto; Vink Jacco; Wu Kinwah; Xie Fei
https://urn.fi/URN:NBN:fi-fe2025082792649
Tiivistelmä
We report the first detection of the X-ray polarization of the bright transient Swift J1727.8−1613 with the Imaging X-ray Polarimetry Explorer. The observation was performed at the beginning of the 2023 discovery outburst, when the source resided in the bright hard state. We find a time- and energy-averaged polarization degree of 4.1% ± 0.2% and a polarization angle of 2
2 ± 13 (errors at 68% confidence level; this translates to ∼20σ significance of the polarization detection). This finding suggests that the hot corona emitting the bulk of the detected X-rays is elongated, rather than spherical. The X-ray polarization angle is consistent with that found in submillimeter wavelengths. Since the submillimeter polarization was found to be aligned with the jet direction in other X-ray binaries, this indicates that the corona is elongated orthogonal to the jet.
Kokoelmat
- Rinnakkaistallenteet [27094]