%A HL Marshall
%A I Liodakis
%A AP Marscher
%A N Di Lalla
%A SG Jorstad
%A DE Kim
%A R Middei
%A M Negro
%A N Omodei
%A AL Peirson
%A M Perri
%A S Puccetti
%A M Laurenti
%A I Agudo
%A G Bonnoli
%A AV Berdyugin
%A E Cavazzuti
%A N Rodriguez Cavero
%A I Donnarumma
%A L Di Gesu
%A J Jormanainen
%A H Krawczynski
%A E Lindfors
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%A F Marin
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%A L Pacciani
%A J Poutanen
%A F Tavecchio
%A PM Kouch
%A FJ Aceituno
%A MI Bernardos
%A V Casanova
%A M García-Comas
%A B Agís-González
%A C Husillos
%A A Marchini
%A A Sota
%A D Blinov
%A IG Bourbah
%A S Kielhmann
%A E Kontopodis
%A N Mandarakas
%A S Romanopoulos
%A R Skalidis
%A A Vervelaki
%A GA Borman
%A EN Kopatskaya
%A EG Larionova
%A DA Morozova
%A SS Savchenko
%A AA Vasilyev
%A AV Zhovtan
%A C Casadio
%A J Escudero
%A J Kramer
%A I Myserlis
%A E Trainou
%A R Imazawa
%A M Sasada
%A Y Fukazawa
%A KS Kawabata
%A M Uemura
%A T Mizuno
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%A D Mawet
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%A V Kravtsov
%A T Sakanoi
%A M Dattolo
%A M Gurwell
%A G Keating
%A R Rao
%A WY Cheong
%A HW Jeong
%A S Kang
%A SH Kim
%A SS Lee
%A E Angelakis
%A A Kraus
%A A Hales
%A S Kameno
%A R Kneissl
%A H Messias
%A H Nagai
%A LA Antonelli
%A M Bachetti
%A L Baldini
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%A R Bellazzini
%A S Bianchi
%A SD Bongiorno
%A R Bonino
%A A Brez
%A N Bucciantini
%A F Capitanio
%V 972
%T Observations of Low and Intermediate Spectral Peak Blazars with the Imaging X-Ray Polarimetry Explorer
%N 1
%D 2024
%I American Astronomical Society
%L discovery10197388
%J The Astrophysical Journal
%X We present X-ray polarimetry observations from the Imaging X-ray Polarimetry Explorer (IXPE) of three low spectral peak and one intermediate spectral peak blazars, namely 3C 273, 3C 279, 3C 454.3, and S5 0716+714. For none of these objects was IXPE able to detect X-ray polarization at the 3σ level. However, we placed upper limits on the polarization degree at ∼10%-30%. The undetected polarizations favor models where the X-ray band is dominated by unpolarized photons upscattered by relativistic electrons in the jets of blazars, although hadronic models are not completely eliminated. We discuss the X-ray polarization upper limits in the context of our contemporaneous multiwavelength polarization campaigns.
%O Original content from this work may be used under the terms of the Creative Commons Attribution 4.0 licence, https://creativecommons.org/licenses/by/4.0/. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI.