Discovery of a VHE gamma-ray source coincident with the supernova remnant CTB 37A

van Eldik C, Aharonian F, Akhperjanian AG, De Almeida UB, Bazer-Bachi AR, Behera B, Beilicke M, Benbow W, Bernloehr K, Boisson C, Borrel V, Braun I, Brion E, Brucker J, Buehler R, Bulik T, Buesching I, Boutelier T, Carrigan S, Chadwick PM, Chaves R, Chounet LM, Clapson AC, Coignet G, Cornils R, Costamante L, Dalton M, Degrange B, Dickinson HJ, Djannati-Atai A, Domainko W, Drury IO, Dubois F, Dubus G, Dyks J, Egberts K, Emmanoulopoulos D, Espigat P, Farnier C, Feinstein F, Fiasson A, Foerster A, Fontaine G, Funk S, Fuessling M, Gabici S, Gallant YA, Giebels B, Glicenstein JF, Glueck B, Goret P, Hadjichristidis C, Hauser D, Hauser M, Heinzelmann G, Henri G, Hermann G, Hinton JA, Hoffmann A, Hofmann W, Holleran M, Hoppe S, Horns D, Jacholkowska A, De Jager OC, Jung I, Katarzynski K, Kaufmann S, Kendziorra E, Kerschhaggl M, Khangulyan D, Khelifi B, Keogh D, Komin N, Kosack K, Lamanna G, Latham IJ, Lemoine-Goumard M, Lenain JP, Lohse T, Martin JM, Martineau-Huynh O, Marcowith A, Masterson C, Maurin D, Mccomb TJL, Moderski R, Moulin E, Nakajima H, Naumann-Godo M, De Naurois M, Nedbal D, Nekrassov D, Nolan SJ, Ohm S, Olive JP, Wilhelmi EDO, Orford KJ, Osborne JL, Ostrowski M, Panter M, Pedaletti G, Pelletier G, Petrucci PO, Pita S, Puehlhofer G, Punch M, Quirrenbach A, Raubenheimer BC, Raue M, Rayner SM, Reimer O, Renaud M, Rieger F, Ripken J, Rob L, Rosier-Lees S, Rowell G, Rudak B, Ruppel J, Sahakian V, Santangelo A, Schlickeiser R, Schoeck FM, Schroeder R, Schwanke U, Schwarzburg S, Schwemmer S, Shalchi A, Skilton JL, Sol H, Spangler D, Stawarz L, Steenkamp R, Stegmann C, Superina G, Tam PH, Tavernet JP, Terrier R, Tibolla O, Van Eldik C, Vasileiadis G, Venter C, Vialle JP, Vincent P, Vivier M, Voelk HJ, Volpe F, Wagner SJ, Ward M, Zdziarski AA, Zech A (2008)

Publication Language: English

Publication Status: Published

Publication Type: Journal article, Original article

Publication year: 2008

Journal

Publisher: EDP Sciences

Book Volume: 490

Pages Range: 685-693

Journal Issue: 2

DOI: 10.1051/0004-6361:200809722

Abstract

Aims. The supernova remnant (SNR) complex CTB 37 is an interesting candidate for observations with very high energy (VHE) γ-ray telescopes such as HESS. In this region, three SNRs are seen. One of them is potentially associated with several molecular clouds, a circumstance that can be used to probe the acceleration of hadronic cosmic rays. Methods. This region was observed with the HESS Cherenkov telescopes and the data were analyzed with standard HESS procedures. Recent X-ray observations with Chandra and XMM-Newton were used to search for X-ray counterparts. Results. The discovery of a new VHE γ-ray source HESS J1714-385 coincident with the remnant CTB 37A is reported. The energy spectrum is well described by a power-law with a photon index of Γ = 2.30 ± 0.13 and a differential flux at 1 TeV of Φ = (8.7 ± 1.0 ± 1.8) × 10 cm s TeV. The integrated flux above 1 TeV is equivalent to 3% of the flux of the Crab nebula above the same energy. This VHE γ-ray source is a counterpart candidate for the unidentified EGRET source 3EG J1714-3857. The observed VHE emission is consistent with the molecular gas distribution around CTB 37A; a close match is expected in a hadronic scenario for γ-ray production. The X-ray observations reveal the presence of thermal X-rays from the NE part of the SNR. In the NW part of the remnant, an extended non-thermal X-ray source, CXOU J171419.8-383023, is discovered as well. Possible connections of the X-ray emission to the newly found VHE source are discussed. © ESO 2008.

Authors with CRIS profile

Involved external institutions

Centre CEA de Saclay (Essonne) France (FR) Durham University United Kingdom (GB) Centre d’étude spatiale des rayonnements (CESR) France (FR) Universität Hamburg (UHH) Germany (DE) Max-Planck-Institut für Kernphysik (MPIK) / Max Planck Institute for Nuclear Physics Germany (DE) University of Paris 7 - Denis Diderot / Université Paris VII Denis Diderot France (FR) Noordwes-Universiteit / North-West University South Africa (ZA) Université Joseph Fourier (UJF Grenoble 1) France (FR) École Polytechnique - Université Paris-Saclay France (FR) National Center for Scientific Research / Centre national de la recherche scientifique (CNRS) France (FR) Dublin Institute for Advanced Studies (DIAS) Ireland (IE) Nicolaus Copernicus Astronomical Centre of the Polish Academy of Sciences Poland (PL) University of Montpellier / Université Montpellier France (FR) Stanford University United States (USA) (US) Humboldt-Universität zu Berlin Germany (DE) Ruprecht-Karls-Universität Heidelberg Germany (DE) University of Leeds United Kingdom (GB) Eberhard Karls Universität Tübingen Germany (DE) Nicolaus Copernicus University (NCU) / Uniwersytet Mikołaja Kopernika w Toruniu (UMK) Poland (PL) Université Bordeaux 1, Sciences et Technologies France (FR) Osaka University Japan (JP) Univerzita Karlova v Praze / Charles University in Prague Czech Republic (CZ) University of Adelaide Australia (AU) Ruhr-Universität Bochum (RUB) Germany (DE) Yerevan Physics Institute (YerPhI) / Երևանի Ֆիզիկայի Ինստիտուտ Armenia (AM) Jagiellonian University / Uniwersytet Jagielloński (UJ) Poland (PL) University of Namibia (UNAM) Namibia (NA)

How to cite

APA:

van Eldik, C., Aharonian, F., Akhperjanian, A.G., De Almeida, U.B., Bazer-Bachi, A.R., Behera, B.,... Zech, A. (2008). Discovery of a VHE gamma-ray source coincident with the supernova remnant CTB 37A. Astronomy & Astrophysics, 490(2), 685-693. https://dx.doi.org/10.1051/0004-6361:200809722

MLA:

van Eldik, Christopher, et al. "Discovery of a VHE gamma-ray source coincident with the supernova remnant CTB 37A." Astronomy & Astrophysics 490.2 (2008): 685-693.

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