X-Ray Polarization Observations of BL Lacertae

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dc.contributor.authorMiddei Riccardo
dc.contributor.authorLiodakis Ioannis
dc.contributor.authorPerri Matteo
dc.contributor.authorPuccetti Simonetta
dc.contributor.authorCavazzuti Elisabetta
dc.contributor.authorDi Gesu Laura
dc.contributor.authorEhlert Steven R.
dc.contributor.authorMadejski Grzegorz
dc.contributor.authorMarscher Alan P.
dc.contributor.authorMarshall Herman L.
dc.contributor.authorMuleri Fabio
dc.contributor.authorNegro Michela
dc.contributor.authorJorstad Svetlana G.
dc.contributor.authorAgís-González Beatriz
dc.contributor.authorAgudo Iván
dc.contributor.authorBonnoli Giacomo
dc.contributor.authorBernardos Maria I.
dc.contributor.authorCasanova Víctor
dc.contributor.authorGarcía-Comas Maya
dc.contributor.authorHusillos César
dc.contributor.authorMarchini Alessandro
dc.contributor.authorSota Alfredo
dc.contributor.authorKouch Pouya M.
dc.contributor.authorLindfors Elina
dc.contributor.authorBorman George A.
dc.contributor.authorKopatskaya Evgenia N.
dc.contributor.authorLarionova Elena G.
dc.contributor.authorMorozova Daria A.
dc.contributor.authorSavchenko Sergey S.
dc.contributor.authorVasilyev Andrey A.
dc.contributor.authorZhovtan Alexey V.
dc.contributor.authorCasadio Carolina
dc.contributor.authorEscudero Juan
dc.contributor.authorMyserlis Ioannis
dc.contributor.authorHales Antonio
dc.contributor.authorKameno Seiji
dc.contributor.authorKneissl Ruediger
dc.contributor.authorMessias Hugo
dc.contributor.authorNagai Hiroshi
dc.contributor.authorBlinov Dmitry
dc.contributor.authorBourbah Ioakeim G.
dc.contributor.authorKiehlmann Sebastian
dc.contributor.authorKontopodis Evangelos
dc.contributor.authorMandarakas Nikos
dc.contributor.authorRomanopoulos Stylianos
dc.contributor.authorSkalidis Raphael
dc.contributor.authorVervelaki Anna
dc.contributor.authorMasiero Joseph R.
dc.contributor.authorMawet Dimitri
dc.contributor.authorMillar-Blanchaer Maxwell A.
dc.contributor.authorPanopoulou Georgia V.
dc.contributor.authorTinyanont Samaporn
dc.contributor.authorBerdyugin Andrei V.
dc.contributor.authorKagitani Masato
dc.contributor.authorKravtsov Vadim
dc.contributor.authorSakanoi Takeshi
dc.contributor.authorImazawa Ryo
dc.contributor.authorSasada Mahito
dc.contributor.authorFukazawa Yasushi
dc.contributor.authorKawabata Koji S.
dc.contributor.authorUemura Makoto
dc.contributor.authorMizuno Tsunefumi
dc.contributor.authorNakaoka Tatsuya
dc.contributor.authorAkitaya Hiroshi
dc.contributor.authorGurwell Mark
dc.contributor.authorRao Ramprasad
dc.contributor.authorDi Lalla Niccoló
dc.contributor.authorCibrario Nicoló
dc.contributor.authorDonnarumma Immacolata
dc.contributor.authorKim Dawoon E.
dc.contributor.authorOmodei Nicola
dc.contributor.authorPacciani Luigi
dc.contributor.authorPoutanen Juri
dc.contributor.authorTavecchio Fabrizio
dc.contributor.authorAntonelli Lucio A.
dc.contributor.authorBachetti Matteo
dc.contributor.authorBaldini Luca
dc.contributor.authorBaumgartner Wayne H.
dc.contributor.authorBellazzini Ronaldo
dc.contributor.authorBianchi Stefano
dc.contributor.authorBongiorno Stephen D.
dc.contributor.authorBonino Raffaella
dc.contributor.authorBrez Alessandro
dc.contributor.authorBucciantini Niccoló
dc.contributor.authorCapitanio Fiamma
dc.contributor.authorCastellano Simone
dc.contributor.authorCiprini Stefano
dc.contributor.authorCosta Enrico
dc.contributor.authorDe Rosa Alessandra
dc.contributor.authorDel Monte Ettore
dc.contributor.authorDi Marco Alessandro
dc.contributor.authorDoroshenko Victor
dc.contributor.authorDovčiak Michal
dc.contributor.authorEnoto Teruaki
dc.contributor.authorEvangelista Yuri
dc.contributor.authorFabiani Sergio
dc.contributor.authorFerrazzoli Riccardo
dc.contributor.authorGarcia Javier A.
dc.contributor.authorGunji Shuichi
dc.contributor.authorHayashida Kiyoshi
dc.contributor.authorHeyl Jeremy
dc.contributor.authorIwakiri Wataru
dc.contributor.authorKaras Vladimir
dc.contributor.authorKitaguchi Takao
dc.contributor.authorKolodziejczak Jeffery J.
dc.contributor.authorKrawczynski Henric
dc.contributor.authorLa Monaca Fabio
dc.contributor.authorLatronico Luca
dc.contributor.authorMaldera Simone
dc.contributor.authorManfreda Alberto
dc.contributor.authorMarin Frédéric
dc.contributor.authorMarinucci Andrea
dc.contributor.authorMassaro Francesco
dc.contributor.authorMatt Giorgio
dc.contributor.authorMitsuishi Ikuyuki
dc.contributor.authorNg C.-Y.
dc.contributor.authorO'Dell Stephen L.
dc.contributor.authorOppedisano Chiara
dc.contributor.authorPapitto Alessandro
dc.contributor.authorPavlov George G.
dc.contributor.authorPeirson Abel L.
dc.contributor.authorPesce-Rollins Melissa
dc.contributor.authorPetrucci Pierre-Olivier
dc.contributor.authorPilia Maura
dc.contributor.authorPossenti Andrea
dc.contributor.authorRamsey Brian D.
dc.contributor.authorRankin John
dc.contributor.authorRatheesh Ajay
dc.contributor.authorRomani Roger W.
dc.contributor.authorSgró Carmelo
dc.contributor.authorSlane Patrick
dc.contributor.authorSoffitta Paolo
dc.contributor.authorSpandre Gloria
dc.contributor.authorTamagawa Toru
dc.contributor.authorTaverna Roberto
dc.contributor.authorTawara Yuzuru
dc.contributor.authorTennant Allyn F.
dc.contributor.authorThomas Nicholas E.
dc.contributor.authorTombesi Francesco
dc.contributor.authorTrois Alessio
dc.contributor.authorTsygankov Sergey
dc.contributor.authorTurolla Roberto
dc.contributor.authorVink Jacco
dc.contributor.authorWeisskopf Martin C.
dc.contributor.authorWu Kinwah
dc.contributor.authorXie Fei
dc.contributor.authorZane Silvia
dc.contributor.organizationfi=Suomen ESO-keskus|en=Finnish Centre for Astronomy with ESO|
dc.contributor.organizationfi=Tuorlan observatorio|en=Tuorla Observatory|
dc.contributor.organization-code1.2.246.10.2458963.20.54954054844
dc.contributor.organization-code1.2.246.10.2458963.20.90670098848
dc.converis.publication-id178405747
dc.converis.urlhttps://research.utu.fi/converis/portal/Publication/178405747
dc.date.accessioned2025-08-27T22:45:28Z
dc.date.available2025-08-27T22:45:28Z
dc.description.abstract<p>Blazars are a class of jet-dominated active galactic nuclei with a typical double-humped spectral energy distribution. It is of common consensus that the synchrotron emission is responsible for the low frequency peak, while the origin of the high frequency hump is still debated. The analysis of X-rays and their polarization can provide a valuable tool to understand the physical mechanisms responsible for the origin of high-energy emission of blazars. We report the first observations of BL Lacertae (BL Lac) performed with the Imaging X-ray Polarimetry Explorer, from which an upper limit to the polarization degree Π<em>X</em> < 12.6% was found in the 2–8 keV band. We contemporaneously measured the polarization in radio, infrared, and optical wavelengths. Our multiwavelength polarization analysis disfavors a significant contribution of proton-synchrotron radiation to the X-ray emission at these epochs. Instead, it supports a leptonic origin for the X-ray emission in BL Lac.</p>
dc.identifier.eissn2041-8213
dc.identifier.jour-issn2041-8205
dc.identifier.olddbid202754
dc.identifier.oldhandle10024/185781
dc.identifier.urihttps://www.utupub.fi/handle/11111/48737
dc.identifier.urlhttps://iopscience.iop.org/article/10.3847/2041-8213/aca281
dc.identifier.urnURN:NBN:fi-fe2023022828850
dc.language.isoen
dc.okm.affiliatedauthorLiodakis, Yannis
dc.okm.affiliatedauthorKouch, Pouya
dc.okm.affiliatedauthorLindfors, Elina
dc.okm.affiliatedauthorBerdyugin, Andrei
dc.okm.affiliatedauthorKrautsou, Vadzim
dc.okm.affiliatedauthorPoutanen, Juri
dc.okm.affiliatedauthorTsygankov, Sergey
dc.okm.discipline115 Astronomy and space scienceen_GB
dc.okm.discipline115 Avaruustieteet ja tähtitiedefi_FI
dc.okm.internationalcopublicationinternational co-publication
dc.okm.internationalityInternational publication
dc.okm.typeA1 ScientificArticle
dc.publisherInstitute of Physics Publishing Ltd.
dc.publisher.countryUnited Kingdomen_GB
dc.publisher.countryBritanniafi_FI
dc.publisher.country-codeGB
dc.relation.articlenumberL10
dc.relation.doi10.3847/2041-8213/aca281
dc.relation.ispartofjournalAstrophysical Journal Letters
dc.relation.issue1
dc.relation.volume942
dc.source.identifierhttps://www.utupub.fi/handle/10024/185781
dc.titleX-Ray Polarization Observations of BL Lacertae
dc.year.issued2023

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