HESS very-high-energy gamma-ray sources without identified counterparts

Aharonian F, Akhperjanian AG, De Almeida UB, Bazer-Bachi AR, Behera B, Beilicke M, Benbow W, Bernloehr K, Boisson C, Bolz O, Borrel V, Braun IV, Brion E, Brown AM, Buehler R, Bulik T, Buesching I, Boutelier T, Carrigan S, Chadwick PM, Chounet LM, Clapson AC, Coignet G, Cornils R, Costamante L, Dalton M, Degrange B, Dickinson HJ, Djannati-Atai A, Domainko W, Drury LO, Dubois F, Dubus G, Dyks J, Egberts K, Emmanoulopoulos D, Espigat P, Farnier C, Feinstein F, Fiasson A, Foerster A, Fontaine G, Funks S, Fuessling M, 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, Kendziorra E, Kerschhaggl M, Khelifi B, Keogh D, Komin N, Kosack K, Lamanna G, Latham IJ, Lemiere A, Lemoine-Goumard M, Lenain JP, Lohse T, Martin JM, Martineau-Huynh O, Marcowith A, Masterson C, Maurin D, Maurin G, Mccomb TJL, Moderski R, Moulin E, De Naurois M, Nedbal 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, Ranchon S, Raubenheimer BC, Raue M, Rayner SM, Renaud M, Ripken J, Rob L, Rolland L, Rosier-Lees S, Rowell G, Rudak B, Ruppel J, Sahakian V, Santangelo A, Schlickeiser R, Schoeck F, Schroeder R, Schwanke U, Schwarzburg S, Schwemmer S, Shalchi A, Sol H, Spanglers D, Stawarz L, Steenkamp R, Stegmann C, Superina G, Tam PH, Tavernet JP, Terrier R, 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 Status: Published

Publication Type: Journal article, Original article

Publication year: 2008

Journal

Publisher: EDP Sciences

Book Volume: 477

Pages Range: 353-363

Journal Issue: 1

DOI: 10.1051/0004-6361:20078516

Abstract

Context. The detection of gamma rays in the very-high-energy (VHE) energy range (100 GeV-100 TeV) provides a direct view of the parent population of ultra-relativistic particles found in astrophysical sources. For this reason, VHE gamma rays are useful for understanding the underlying astrophysical processes in non-thermal sources. Aims. We investigate unidentified VHE gamma-ray sources that have been discovered with HESS in the most sensitive blind survey of the Galactic plane at VHE energies conducted so far. Methods. The HESS array of imaging atmospheric Cherenkov telescopes (IACTs) has a high sensitivity compared with previous instruments (∼0.01 Crab in 25 h observation time for a 5σ point-source detection), and with its large field of view, is well suited for scan-based observations. The on-going HESS survey of the inner Galaxy has revealed a large number of new VHE sources, and for each we attempt to associate the VHE emission with multi-wavelength data in the radio through X-ray wavebands. Results. For each of the eight unidentified VHE sources considered here, we present the energy spectra and. sky maps of the sources and their environment. The VHE morphology is compared with available multi-wavelength data (mainly radio and X-rays). No plausible counterparts are found. © ESO 2007.

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APA:

Aharonian, F., Akhperjanian, A.G., De Almeida, U.B., Bazer-Bachi, A.R., Behera, B., Beilicke, M.,... Zech, A. (2008). HESS very-high-energy gamma-ray sources without identified counterparts. Astronomy & Astrophysics, 477(1), 353-363. https://dx.doi.org/10.1051/0004-6361:20078516

MLA:

Aharonian, F., et al. "HESS very-high-energy gamma-ray sources without identified counterparts." Astronomy & Astrophysics 477.1 (2008): 353-363.

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