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Title: Discovery and follow-up studies of the extended, off-plane, VHE gamma-ray source HESS J1507-622
Authors: Acero, F.
Aharonian, F.
Akhperjanian, A. G.
Anton, G.
de Almeida UB
Bazer-Bachi, A. R.
Becherini, Y.
Behera, B.
Bernloehr, K.
Bochow, A.
Boisson, C.
Marcowith, A.
Raubenheimer, B. C.
Brun, P.
Masbou, J.
Maurin, D.
McComb, T. J. L.
Medina, M. C.
Schlickeiser, R.
Mehault, J.
Moderski, R.
Vivier, M.
Moulin, E.
Nolan, S. J.
Ohm, S.
Gabici, S.
Olive, J. -. F.
Raue, M.
Wilhelmi, E. D. O.
Bolmont, J.
Orford, K. J.
Schoeck, F. M.
Domainko, W.
Ostrowski, M.
Panter, M.
Arribas, M. P.
Pedaletti, G.
Szostek, A.
Pelletier, G.
Petrucci, P. -. O.
Pita, S.
Rayner, S. M.
Reimer, O.
Hoffmann, A.
Renaud, M.
Schwanke, U.
Rieger, F.
Degrange, B.
Ripken, J.
Tam, P. H.
Rob, L.
Rosier-Lees, S.
Brucker, J.
Rowell, G.
Voelk, H. J.
Rudak, B.
Rulten, C. B.
Ruppel, J.
Schwarzburg, S.
Brun, F.
Schwemmer, S.
Tavernet, J-P.
Shalchi, A.
Fuessling, M.
Sikora, M.
Volpe, F.
Skilton, J. L.
Sol, H.
Dickinson, H. J.
Stawarz, L.
Steenkamp, R.
Stegmann, C.
Stinzing, F.
Terrier, R.
Djannati-Atai, A.
Tibolla, O.
Wagner, S. J.
Tluczykont, M.
Hinton, J. A.
van Eldik C
Vasileiadis, G.
Venter, C.
de Naurois M
Venter, L.
Buehler, R.
Vialle, J. P.
Vincent, P.
Ward, M.
Gallant, Y. A.
Zdziarski, A. A.
Zech, A.
Khelifi, B.
Collaboration, H. E. S. S.
Bulik, T.
Buesching, I.
Punch, M.
Boutelier, T.
Drury, L. O.
Chadwick, P. M.
Charbonnier, A.
Chaves, R. C. G.
Gerard, L.
Nicholas, B.
Cheesebrough, A.
Chounet, L. -. M.
Clapson, A. C.
Coignet, G.
Hofmann, W.
Dalton, M.
Daniel, M. K.
Davids, I. D.
Dubois, F.
Dubus, G.
Santangelo, A.
Dyks, J.
Gerbig, D.
Dyrda, M.
Naumann-Godo, M.
Egberts, K.
Holleran, M.
Emmanoulopoulos, D.
Espigat, P.
Farnier, C.
Feinstein, F.
Keogh, D.
Fiasson, A.
Foerster, A.
Fontaine, G.
Giebels, B.
Glicenstein, J. F.
Glueck, B.
Hoppe, S.
Goret, P.
Puehlhofer, G.
Goering, D.
Klochkov, D.
Hauser, D.
Hauser, M.
Nedbal, D.
Heinz, S.
Heinzelmann, G.
Henri, G.
Hermann, G.
Horns, D.
Nekrassov, D.
Jacholkowska, A.
Kluzniak, W.
de Jager OC
Sahakian, V.
Jahn, C.
Jung, I.
Katarzynski, K.
Borrel, V.
Katz, U.
Kaufmann, S.
Kerschhaggl, M.
Khangulyan, D.
Kneiske, T.
Quirrenbach, A.
Komin, N.
Kosack, K.
Superina, G.
Kossakowski, R.
Lamanna, G.
Lenain, J. -. P.
Deil, C.
Lohse, T.
Niemiec, J.
Marandon, V.
Martineau-Huynh, O.
First Published: 30-Nov-2010
Publisher: EDP Sciences for European Southern Observatory (ESO)
Citation: Astronomy & Astrophysics, 2011, 525
Abstract: Context. The detection of gamma-rays in the very-high-energy (VHE) range (100 GeV−100 TeV) offers the possibility of studying the parent population of ultrarelativistic particles found in astrophysical sources, so it is useful for understanding the underlying astrophysical processes in nonthermal sources. Aims. The discovery of the VHE gamma-ray source HESS J1507-622 is reported and possibilities regarding its nature are investigated. Methods. The H.E.S.S. array of imaging atmospheric Cherenkov telescopes (IACTs) has a high sensitivity compared with previous instruments (~1% of the Crab flux in 25 h observation time for a 5σ point-source detection) and has a large field of view (~5° in diameter). HESS J1507-622 was discovered within the ongoing H.E.S.S. survey of the inner Galaxy, and the source was also studied by means of dedicated multiwavelength observations. Results. A Galactic gamma-ray source, HESS J1507-622, located ~3.5° from the Galactic plane was detected with a statistical significance >9σ. Its energy spectrum is well fitted by a power law with spectral index Γ = 2.24 ± 0.16stat ± 0.20sys and a flux above 1 TeV of (1.5 ± 0.4stat ± 0.3sys) × 10-12 cm-2 s-1. Possible interpretations (considering both hadronic and leptonic models) of the VHE gamma-ray emission are discussed in the absence of an obvious counterpart.
DOI Link: 10.1051/0004-6361/201015187
ISSN: 0004-6361
Version: Publisher Version
Status: Peer-reviewed
Type: Journal Article
Rights: Copyright © 2010 ESO. Reproduced with permission from Astronomy & Astrophysics, © ESO.
Appears in Collections:Published Articles, Dept. of Physics and Astronomy

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