TeV flaring activity of the AGN PKS 0625–354 in November 2018-Reference-Cited by-同舟云学术

TeV flaring activity of the AGN PKS 0625–354 in November 2018

Published:2024-03 Issue: Volume:683 Page:A70
ISSN:0004-6361
Container-title:Astronomy & Astrophysics
language:
Short-container-title:A&A

Author:

,Aharonian F.,Ait Benkhali F.,Aschersleben J.^ORCID,Ashkar H.^ORCID,Backes M.^ORCID,Baktash A.,Barbosa Martins V.^ORCID,Barnard J.,Batzofin R.^ORCID,Becherini Y.,Berge D.,Bernlöhr K.^ORCID,Bi B.,Böttcher M.^ORCID,Boisson C.^ORCID,Bolmont J.^ORCID,de Bony de Lavergne M.,Borowska J.,Bradascio F.,Breuhaus M.^ORCID,Brose R.,Brown A.,Brun F.,Bruno B.,Bulik T.,Burger-Scheidlin C.^ORCID,Bylund T.,Caroff S.,Casanova S.,Cecil R.,Celic J.,Cerruti M.^ORCID,Chand T.,Chandra S.,Chen A.^ORCID,Chibueze J.^ORCID,Chibueze O.,Cotter G.,Damascene Mbarubucyeye J.^ORCID,Davids I. D.,Djuvsland J.^ORCID,Dmytriiev A.^ORCID,Doroshenko V.,Egberts K.,Einecke S.,Ernenwein J.-P.,Fontaine G.^ORCID,Füßling M.,Funk S.,Gabici S.,Ghafourizadeh S.,Giavitto G.^ORCID,Glawion D.^ORCID,Glicenstein J. F.,Glombitza J.,Goswami P.,Grolleron G.,Haerer L.,Hinton J. A.,Holch T. L.^ORCID,Holler M.,Horns D.,Jamrozy M.^ORCID,Jankowsky F.,Joshi V.,Jung-Richardt I.,Kasai E.,Katarzyński K.,Khatoon R.,Khélifi B.^ORCID,Kluźniak W.^ORCID,Komin Nu.^ORCID,Kosack K.,Kostunin D.,Lang R. G.,Le Stum S.,Leitl F.,Lemière A.,Lenain J.-P.^ORCID,Leuschner F.^ORCID,Luashvili A.,Mackey J.^ORCID,Marx R.,Mehta A.,Meyer M.,Mitchell A.,Moderski R.^ORCID,Montanari A.,Moulin E.^ORCID,de Naurois M.^ORCID,Niemiec J.,O’Brien P.,Ohm S.,Olivera-Nieto L.,de Ona Wilhelmi E.,Ostrowski M.,Panny S.^ORCID,Parsons R. D.,Pita S.,Prokhorov D. A.,Pühlhofer G.,Punch M.^ORCID,Quirrenbach A.,Reichherzer P.,Reimer A.^ORCID,Reimer O.,Ren H.^ORCID,Rieger F.,Rudak B.^ORCID,Sahakian V.,Salzmann H.,Sanchez D. A.,Sasaki M.,Schüssler F.,Schutte H. M.,Shapopi J. N. S.,Sol H.,Specovius A.,Spencer S.,Stawarz Ł.,Steenkamp R.,Steinmassl S.,Streil K.,Sushch I.,Suzuki H.^ORCID,Takahashi T.,Tanaka T.,van Eldik C.,Vecchi M.^ORCID,Veh J.,Venter C.,Wagner S. J.^ORCID,Wierzcholska A.^ORCID,Zacharias M.,Zargaryan D.,Zdziarski A. A.^ORCID,Zech A.,Zouari S.,Żywucka N.^ORCID

Abstract

Most γ-ray detected active galactic nuclei are blazars with one of their relativistic jets pointing towards the Earth. Only a few objects belong to the class of radio galaxies or misaligned blazars. Here, we investigate the nature of the object PKS 0625−354, its γ-ray flux and spectral variability and its broad-band spectral emission with observations from H.E.S.S., Fermi-LAT, Swift-XRT, and UVOT taken in November 2018. The H.E.S.S. light curve above 200 GeV shows an outburst in the first night of observations followed by a declining flux with a halving time scale of 5.9 h. The γγ-opacity constrains the upper limit of the angle between the jet and the line of sight to ∼10°. The broad-band spectral energy distribution shows two humps and can be well fitted with a single-zone synchrotron self Compton emission model. We conclude that PKS 0625−354, as an object showing clear features of both blazars and radio galaxies, can be classified as an intermediate active galactic nuclei. Multi-wavelength studies of such intermediate objects exhibiting features of both blazars and radio galaxies are sparse but crucial for the understanding of the broad-band emission of γ-ray detected active galactic nuclei in general.

Funder

the Commissariat à l’énergie atomique et aux énergies alternatives

the Polish Ministry of Education and Science

the University of Amsterdam and the Science Committee of Armenia

the University of Namibia

German Ministry for Education and Research

the Max Planck Society

the Helmholtz Association

the French Ministry of Higher Education, Research and Innovation

the Centre National de la Recherche Scientifique

the U.K. Science and Technology Facilities Council

the Irish Research Council