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Journal Articles The Astrophysical journal letters Year : 2023

X-Ray Polarization of BL Lacertae in Outburst

Abel L. Peirson , Michela Negro , Ioannis Liodakis , Riccardo Middei , Dawoon E. Kim , Alan P. Marscher , Herman L. Marshall , Luigi Pacciani , Roger W. Romani , Kinwah Wu , Alessandro Di Marco , Niccoló Di Lalla , Nicola Omodei , Svetlana G. Jorstad , Iván Agudo , Pouya M. Kouch , Elina Lindfors , Francisco José Aceituno , Maria I. Bernardos , Giacomo Bonnoli , Víctor Casanova , Maya García-Comas , Beatriz Agís-González , César Husillos , Alessandro Marchini , Alfredo Sota , Carolina Casadio , Juan Escudero , Ioannis Myserlis , Albrecht Sievers , Mark Gurwell , Ramprasad Rao , Ryo Imazawa , Mahito Sasada , Yasushi Fukazawa , Koji S. Kawabata , Makoto Uemura , Tsunefumi Mizuno , Tatsuya Nakaoka , Hiroshi Akitaya , Yeon Cheong , Hyeon-Woo Jeong , Sincheol Kang , Sang-Hyun Kim , Sang-Sung Lee , Emmanouil Angelakis , Alexander Kraus , Nicoló Cibrario , Immacolata Donnarumma , Juri Poutanen , Fabrizio Tavecchio , Lucio A. Antonelli , 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 , Chien-Ting Chen , Stefano Ciprini , Enrico Costa , Alessandra de Rosa , Ettore del Monte , Laura Di Gesu , 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 , Takao Kitaguchi , Jeffery J. Kolodziejczak , Henric Krawczynski , Fabio La Monaca , Luca Latronico , Grzegorz Madejski , Simone Maldera , Alberto Manfreda , Frédéric Marin (1) , Andrea Marinucci , Francesco Massaro , Giorgio Matt , Ikuyuki Mitsuishi , Fabio Muleri , C. -Y. Ng , Stephen L. O'Dell , Chiara Oppedisano , Alessandro Papitto , George G. Pavlov , Matteo Perri , Melissa Pesce-Rollins , Pierre-Olivier Petrucci (2) , Maura Pilia , Andrea Possenti , Simonetta Puccetti , Brian D. Ramsey , John Rankin , Ajay Ratheesh , Oliver J. Roberts , Carmelo Sgró , 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 Tsygankov , Roberto Turolla , Jacco Vink , Martin C. Weisskopf , Fei Xie , Silvia Zane
Abel L. Peirson
  • Function : Author
Michela Negro
  • Function : Author
Ioannis Liodakis
  • Function : Author
Riccardo Middei
  • Function : Author
Dawoon E. Kim
  • Function : Author
Alan P. Marscher
  • Function : Author
Herman L. Marshall
  • Function : Author
Luigi Pacciani
  • Function : Author
Roger W. Romani
  • Function : Author
Kinwah Wu
  • Function : Author
Alessandro Di Marco
  • Function : Author
Niccoló Di Lalla
  • Function : Author
Nicola Omodei
  • Function : Author
Svetlana G. Jorstad
  • Function : Author
Iván Agudo
  • Function : Author
Pouya M. Kouch
  • Function : Author
Elina Lindfors
  • Function : Author
Francisco José Aceituno
  • Function : Author
Maria I. Bernardos
  • Function : Author
Giacomo Bonnoli
  • Function : Author
Víctor Casanova
  • Function : Author
Maya García-Comas
  • Function : Author
Beatriz Agís-González
  • Function : Author
César Husillos
  • Function : Author
Alessandro Marchini
  • Function : Author
Alfredo Sota
  • Function : Author
Carolina Casadio
  • Function : Author
Juan Escudero
  • Function : Author
Ioannis Myserlis
  • Function : Author
Albrecht Sievers
  • Function : Author
Mark Gurwell
  • Function : Author
Ramprasad Rao
  • Function : Author
Ryo Imazawa
  • Function : Author
Mahito Sasada
  • Function : Author
Yasushi Fukazawa
  • Function : Author
Koji S. Kawabata
  • Function : Author
Makoto Uemura
  • Function : Author
Tsunefumi Mizuno
  • Function : Author
Tatsuya Nakaoka
  • Function : Author
Hiroshi Akitaya
  • Function : Author
Yeon Cheong
  • Function : Author
Hyeon-Woo Jeong
  • Function : Author
Sincheol Kang
  • Function : Author
Sang-Hyun Kim
  • Function : Author
Sang-Sung Lee
  • Function : Author
Emmanouil Angelakis
  • Function : Author
Alexander Kraus
  • Function : Author
Nicoló Cibrario
  • Function : Author
Immacolata Donnarumma
  • Function : Author
Juri Poutanen
  • Function : Author
Fabrizio Tavecchio
  • Function : Author
Lucio A. Antonelli
  • Function : Author
Matteo Bachetti
  • Function : Author
Luca Baldini
  • Function : Author
Wayne H. Baumgartner
  • Function : Author
Ronaldo Bellazzini
  • Function : Author
Stefano Bianchi
  • Function : Author
Stephen D. Bongiorno
  • Function : Author
Raffaella Bonino
  • Function : Author
Alessandro Brez
  • Function : Author
Niccoló Bucciantini
  • Function : Author
Fiamma Capitanio
  • Function : Author
Simone Castellano
  • Function : Author
Elisabetta Cavazzuti
  • Function : Author
Chien-Ting Chen
  • Function : Author
Stefano Ciprini
  • Function : Author
Enrico Costa
  • Function : Author
Alessandra de Rosa
  • Function : Author
Ettore del Monte
  • Function : Author
Laura Di Gesu
  • Function : Author
Victor Doroshenko
  • Function : Author
Michal Dovčiak
  • Function : Author
Steven R. Ehlert
  • Function : Author
Teruaki Enoto
  • Function : Author
Yuri Evangelista
  • Function : Author
Sergio Fabiani
  • Function : Author
Riccardo Ferrazzoli
  • Function : Author
Javier A. Garcia
  • Function : Author
Shuichi Gunji
  • Function : Author
Kiyoshi Hayashida
  • Function : Author
Jeremy Heyl
  • Function : Author
Wataru Iwakiri
  • Function : Author
Philip Kaaret
  • Function : Author
Vladimir Karas
  • Function : Author
Takao Kitaguchi
  • Function : Author
Jeffery J. Kolodziejczak
  • Function : Author
Henric Krawczynski
  • Function : Author
Fabio La Monaca
  • Function : Author
Luca Latronico
  • Function : Author
Grzegorz Madejski
  • Function : Author
Simone Maldera
  • Function : Author
Alberto Manfreda
  • Function : Author
Andrea Marinucci
  • Function : Author
Francesco Massaro
  • Function : Author
Giorgio Matt
  • Function : Author
Ikuyuki Mitsuishi
  • Function : Author
Fabio Muleri
  • Function : Author
C. -Y. Ng
  • Function : Author
Stephen L. O'Dell
  • Function : Author
Chiara Oppedisano
  • Function : Author
Alessandro Papitto
  • Function : Author
George G. Pavlov
  • Function : Author
Matteo Perri
  • Function : Author
Melissa Pesce-Rollins
  • Function : Author
Maura Pilia
  • Function : Author
Andrea Possenti
  • Function : Author
Simonetta Puccetti
  • Function : Author
Brian D. Ramsey
  • Function : Author
John Rankin
  • Function : Author
Ajay Ratheesh
  • Function : Author
Oliver J. Roberts
  • Function : Author
Carmelo Sgró
  • Function : Author
Patrick Slane
  • Function : Author
Paolo Soffitta
  • Function : Author
Gloria Spandre
  • Function : Author
Douglas A. Swartz
  • Function : Author
Toru Tamagawa
  • Function : Author
Roberto Taverna
  • Function : Author
Yuzuru Tawara
  • Function : Author
Allyn F. Tennant
  • Function : Author
Nicholas E. Thomas
  • Function : Author
Francesco Tombesi
  • Function : Author
Alessio Trois
  • Function : Author
Sergey Tsygankov
  • Function : Author
Roberto Turolla
  • Function : Author
Jacco Vink
  • Function : Author
Martin C. Weisskopf
  • Function : Author
Fei Xie
  • Function : Author
Silvia Zane
  • Function : Author

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 ${{\rm{\Pi }}}_{2\mbox{--}4\mathrm{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.
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insu-04102297 , version 1 (22-05-2023)

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Abel L. Peirson, Michela Negro, Ioannis Liodakis, Riccardo Middei, Dawoon E. Kim, et al.. X-Ray Polarization of BL Lacertae in Outburst. The Astrophysical journal letters, 2023, 948, ⟨10.3847/2041-8213/acd242⟩. ⟨insu-04102297⟩
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