X-Ray Polarization of BL Lacertae in Outburst-Reference-Cited by-同舟云学术

X-Ray Polarization of BL Lacertae in Outburst

Published:2023-05-01 Issue:2 Volume:948 Page:L25
ISSN:2041-8205
Container-title:The Astrophysical Journal Letters
language:
Short-container-title:ApJL

Author:

Peirson Abel L.^ORCID,Negro Michela^ORCID,Liodakis Ioannis^ORCID,Middei Riccardo^ORCID,Kim Dawoon E.^ORCID,Marscher Alan P.^ORCID,Marshall Herman L.^ORCID,Pacciani Luigi^ORCID,Romani Roger W.^ORCID,Wu Kinwah^ORCID,Di Marco Alessandro^ORCID,Di Lalla Niccoló^ORCID,Omodei Nicola^ORCID,Jorstad Svetlana G.^ORCID,Agudo Iván^ORCID,Kouch Pouya M.,Lindfors Elina,Aceituno Francisco José,Bernardos Maria I.,Bonnoli Giacomo^ORCID,Casanova Víctor,García-Comas Maya,Agís-González Beatriz^ORCID,Husillos César^ORCID,Marchini Alessandro^ORCID,Sota Alfredo^ORCID,Casadio Carolina^ORCID,Escudero Juan^ORCID,Myserlis Ioannis^ORCID,Sievers Albrecht,Gurwell Mark^ORCID,Rao Ramprasad,Imazawa Ryo^ORCID,Sasada Mahito,Fukazawa Yasushi^ORCID,Kawabata Koji S.^ORCID,Uemura Makoto,Mizuno Tsunefumi^ORCID,Nakaoka Tatsuya,Akitaya Hiroshi^ORCID,Cheong Yeon,Jeong Hyeon-Woo,Kang Sincheol,Kim Sang-Hyun,Lee Sang-Sung,Angelakis Emmanouil,Kraus Alexander,Cibrario Nicoló^ORCID,Donnarumma Immacolata^ORCID,Poutanen Juri^ORCID,Tavecchio Fabrizio^ORCID,Antonelli Lucio A.^ORCID,Bachetti Matteo^ORCID,Baldini Luca^ORCID,Baumgartner Wayne H.^ORCID,Bellazzini Ronaldo^ORCID,Bianchi Stefano^ORCID,Bongiorno Stephen D.^ORCID,Bonino Raffaella^ORCID,Brez Alessandro^ORCID,Bucciantini Niccoló^ORCID,Capitanio Fiamma^ORCID,Castellano Simone^ORCID,Cavazzuti Elisabetta^ORCID,Chen Chien-Ting^ORCID,Ciprini Stefano^ORCID,Costa Enrico^ORCID,De Rosa Alessandra^ORCID,Del Monte Ettore^ORCID,Di Gesu Laura,Doroshenko Victor^ORCID,Dovčiak Michal^ORCID,Ehlert Steven R.^ORCID,Enoto Teruaki^ORCID,Evangelista Yuri^ORCID,Fabiani Sergio^ORCID,Ferrazzoli Riccardo^ORCID,Garcia Javier A.^ORCID,Gunji Shuichi^ORCID,Hayashida Kiyoshi,Heyl Jeremy^ORCID,Iwakiri Wataru^ORCID,Kaaret Philip^ORCID,Karas Vladimir^ORCID,Kitaguchi Takao,Kolodziejczak Jeffery J.^ORCID,Krawczynski Henric^ORCID,La Monaca Fabio^ORCID,Latronico Luca^ORCID,Madejski Grzegorz,Maldera Simone^ORCID,Manfreda Alberto^ORCID,Marin Frédéric^ORCID,Marinucci Andrea^ORCID,Massaro Francesco^ORCID,Matt Giorgio^ORCID,Mitsuishi Ikuyuki,Muleri Fabio^ORCID,Ng C.-Y.^ORCID,O’Dell Stephen L.^ORCID,Oppedisano Chiara^ORCID,Papitto Alessandro^ORCID,Pavlov George G.^ORCID,Perri Matteo,Pesce-Rollins Melissa^ORCID,Petrucci Pierre-Olivier^ORCID,Pilia Maura^ORCID,Possenti Andrea^ORCID,Puccetti Simonetta,Ramsey Brian D.^ORCID,Rankin John^ORCID,Ratheesh Ajay^ORCID,Roberts Oliver J.^ORCID,Sgró Carmelo^ORCID,Slane Patrick^ORCID,Soffitta Paolo,Spandre Gloria^ORCID,Swartz Douglas A.^ORCID,Tamagawa Toru^ORCID,Taverna Roberto^ORCID,Tawara Yuzuru,Tennant Allyn F.^ORCID,Thomas Nicholas E.^ORCID,Tombesi Francesco^ORCID,Trois Alessio^ORCID,Tsygankov Sergey^ORCID,Turolla Roberto^ORCID,Vink Jacco^ORCID,Weisskopf Martin C.^ORCID,Xie Fei^ORCID,Zane Silvia^ORCID

Abstract

Abstract We report the first >99% confidence detection of X-ray polarization in BL Lacertae. During a recent X-ray/γ-ray outburst, a 287 ks observation (2022 November 27–30) was taken using the Imaging X-ray Polarimetry Explorer (IXPE), together with contemporaneous multiwavelength observations from the Neil Gehrels Swift observatory and XMM-Newton in soft X-rays (0.3–10 keV), NuSTAR in hard X-rays (3–70 keV), and optical polarization from the Calar Alto and Perkins Telescope observatories. Our contemporaneous X-ray data suggest that the IXPE energy band is at the crossover between the low- and high-frequency blazar emission humps. The source displays significant variability during the observation, and we measure polarization in three separate time bins. Contemporaneous X-ray spectra allow us to determine the relative contribution from each emission hump. We find >99% confidence X-ray polarization

Π 2 – 4 keV = 21.7 − 7.9 + 5.6 %

and electric vector polarization angle ψ 2–4keV = −28.°7 ± 8.°7 in the time bin with highest estimated synchrotron flux contribution. We discuss possible implications of our observations, including previous IXPE BL Lacertae pointings, tentatively concluding that synchrotron self-Compton emission dominates over hadronic emission processes during the observed epochs.

Publisher

American Astronomical Society

Subject

Space and Planetary Science,Astronomy and Astrophysics

Link

https://iopscience.iop.org/article/10.3847/2041-8213/acd242/pdf

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