HESS discovery of very high energy gamma-ray emission from PKS 0625-354

Abdalla H, Abramowski A, Aharonian F, Benkhali FA, Akhperjanian AG, Andersson T, Anguner EO, Arrieta M, Aubert P, Backes M, Balzer A, Barnard M, Becherini Y, Tjus JB, Berge D, Bernhard S, Bernlohr K, Blackwell R, Bottcher M, Boisson C, Bolmont J, Bordas P, Bregeon J, Brun F, Brun P, Bryan M, Bulik T, Capasso M, Carr J, Casanova S, Cerruti M, Chakraborty N, Chalme-Calvet R, Chaves RCG, Chen A, Chevalier J, Chretien M, Colafrancesco S, Cologna G, Condon B, Conrad J, Cui Y, Davids ID, Decock J, Degrange B, Deil C, Devin J, Dewilt P, Dirson L, Djannati-Atai A, Domainko W, Donath A, Drury LO, Dubus G, Dutson K, Dyks J, Dyrda M, Edwards T, Egberts K, Eger P, Ernenwein JP, Eschbach S, Farnier C, Fegan S, Fernandes MV, Fiasson A, Fontaine G, Forster A, Funk S, Fussling M, Gabici S, Gajdus M, Gallant YA, Garrigoux T, Giavitto G, Giebels B, Glicenstein JF, Gottschal D, Goya A, Grondin MH, Hadasch D, Hahn J, Haupt M, Hawkes J, Heinzelmann G, Henri G, Hermann G, Hervet O, Hinton JA, Hofmann W, Hoischen C, Holler M, Horns D, Ivascenko A, Jacholkowska A, Jamrozy M, Janiak M, Jankowsky D, Jankowsky F, Jingo M, Jogler T, Jouvin L, Jung-Richardt I, Kastendieck MA, Katarzynski K, Katz U, Kerszberg D, Khelifi B, Kieffer M, King J, Klepser S, Klochkov D, Kluzniak W, Kolitzus D, Komin N, Kosack K, Krakau S, Kraus M, Krayzel F, Kruger PP, Laffon H, Lamanna G, Lau J, Lees JP, Lefaucheur J, Lefranc V, Lemiere A, Lemoine-Goumard M, Lenain JP, Leser E, Lohse T, Lorentz M, Liu R, Lopez-Coto R, Lypova I, Marandon V, Marcowith A, Mariaud C, Marx R, Maurin G, Maxted N, Mayer M, Meintjes PJ, Meyer M, Mitchell AMW, Moderski R, Mohamed M, Mohrmann L, Mora K, Moulin E, Murach T, De Naurois M, Niederwanger F, Niemiec J, Oakes L, O'Brien P, Odaka H, Ottl S, Ohm S, Ostrowski M, Oya I, Padovani M, Panter M, Parsons RD, Pekeur NW, Pelletier G, Perennes C, Petrucci PO, Peyaud B, Piel Q, Pita S, Poon H, Prokhorov D, Prokoph H, Puhlhofer G, Punch M, Quirrenbach A, Raab S, Reimer A, Reimer O, Renaud M, De Los Reyes R, Rieger F, Romoli C, Rosier-Lees S, Rowel G, Rudak B, Rulten CB, Sahakian V, Salek D, Sanchez DA, Santangelo A, Sasaki M, Schlickeiser R, Schussler F, Schulz A, Schwanke U, Schwemmer S, Settimo M, Seyffert AS, Shafi N, Shilon I, Simoni R, Sol H, Spanier F, Spengler G, Spies F, Stawarz L, Steenkamp R, Stegmann C, Stinzing F, Stycz K, Sushch I, Tavernet JP, Tavernier T, Taylor AM, Terrier R, Tibaldo L, Tiziani D, Tluczykont M, Trichard C, Tuffs R, Uchiyama Y, Van Der Walt DJ, van Eldik C, Van Rensburg C, Van Soelen B, Vasileiadis G, Veh J, Venter C, Viana A, Vincent P, Vink J, Voisin F, Volk HJ, Vuillaume T, Wadiasingh Z, Wagner SJ, Wagner P, Wagner RM, White R, Wierzcholska A, Willmann P, Wörnlein A, Wouters D, Yang R, Zabalza V, Zaborov D, Zacharias M, Zanin R, Zdziarski AA, Zech A, Zefi F, Ziegler A, Zywucka N (2018)

Publication Status: Published

Publication Type: Journal article, Original article

Publication year: 2018

Journal

Publisher: OXFORD UNIV PRESS

Book Volume: 476

Pages Range: 4187-4198

Journal Issue: 3

DOI: 10.1093/mnras/sty439

Abstract

PKS 0625-354 (z = 0.055) was observed with the four High Energy Stereoscopic System (H.E.S.S.) telescopes in 2012 during 5.5 h. The source was detected above an energy threshold of 200 GeV at a significance level of 6.1 sigma. No significant variability is found in these observations. The source is well described with a power-law spectrum with photon index Gamma = 2.84 +/- 0.50(stat) +/- 0.10(syst) and normalization (at E-0 = 1.0 TeV) N-0(E-0)=(0.58 +/- 0.22(stat) +/- 0.12(syst)) x 10(-12) TeV-1 cm(-2) s(-1). Multiwavelength data collected with Fermi-LAT, Swift-XRT, Swift-UVOT, ATOM and WISE are also analysed. Significant variability is observed only in the Fermi-LAT gamma-ray and Swift-XRT X-ray energy bands. Having a good multiwavelength coverage from radio to very high energy, we performed a broad-band modelling from two types of emission scenarios. The results from a one zone lepto-hadronic and a multizone leptonic models are compared and discussed. On the grounds of energetics, our analysis favours a leptonic multizone model. Models associated to the X-ray variability constraint support previous results, suggesting a BL Lac nature of PKS 0625-354 with, however, a large-scale jet structure typical of a radio galaxy.

Authors with CRIS profile

Additional Organisation(s)

Involved external institutions

Noordwes-Universiteit / North-West University South Africa (ZA) Max-Planck-Institut für Kernphysik (MPIK) / Max Planck Institute for Nuclear Physics Germany (DE) National Academy of Sciences of the Republic of Armenia (NAS RA) / Հայաստանի Հանրապետության գիտությունների ազգային ակադեմիա, ՀՀ ԳԱԱ Armenia (AM) Linnaeus University (LNU) / Linnéuniversitetet Sweden (SE) Humboldt-Universität zu Berlin Germany (DE) University of Paris 7 - Denis Diderot / Université Paris VII Denis Diderot France (FR) University of Savoy Mont Blanc / Université Savoie Mont Blanc France (FR) University of Namibia (UNAM) Namibia (NA) Universität Hamburg (UHH) Germany (DE) Ruhr-Universität Bochum (RUB) Germany (DE) University of Amsterdam Netherlands (NL) Leopold-Franzens-Universität Innsbruck / University of Innsbruck Austria (AT) University of Adelaide Australia (AU) University of Montpellier / Université Montpellier France (FR) Institut national de physique nucléaire et de physique des particules (IN2P3) France (FR) Commissariat à l'énergie atomique France (FR) University of Warsaw / Uniwersytet Warszawski Poland (PL) Eberhard Karls Universität Tübingen Germany (DE) Aix-Marseille University / Aix-Marseille Université France (FR) University of the Witwatersrand (WITS) South Africa (ZA) Ruprecht-Karls-Universität Heidelberg Germany (DE) Stockholm University / Stockholms universitet Sweden (SE) École Polytechnique - Université Paris-Saclay France (FR) Dublin Institute for Advanced Studies (DIAS) Ireland (IE) University of Grenoble Alpes (UGA) / Université de Grenoble France (FR) University of Leicester United Kingdom (GB) Nicolaus Copernicus Astronomical Centre of the Polish Academy of Sciences Poland (PL) Institute of Nuclear Physics Polish Academy of Sciences / Instytut Fizyki Jądrowej im. Henryka Niewodniczańskiego Polskiej Akademii Nauk Poland (PL) Universität Potsdam Germany (DE) Deutsches Elektronen-Synchrotron DESY Germany (DE) Jagiellonian University / Uniwersytet Jagielloński (UJ) Poland (PL) Nicolaus Copernicus University (NCU) / Uniwersytet Mikołaja Kopernika w Toruniu (UMK) Poland (PL) University of the Free State South Africa (ZA) Rikkyo University / 立教大学 Japan (JP)

How to cite

APA:

Abdalla, H., Abramowski, A., Aharonian, F., Benkhali, F.A., Akhperjanian, A.G., Andersson, T.,... Zywucka, N. (2018). HESS discovery of very high energy gamma-ray emission from PKS 0625-354. Monthly Notices of the Royal Astronomical Society, 476(3), 4187-4198. https://doi.org/10.1093/mnras/sty439

MLA:

Abdalla, H., et al. "HESS discovery of very high energy gamma-ray emission from PKS 0625-354." Monthly Notices of the Royal Astronomical Society 476.3 (2018): 4187-4198.

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