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Discovery of a point-like very-high-energy gamma-ray source in Monoceros

F.A. Aharonian A.G. Akhperjanian A.R. Bazer-Bachi 1 B. Behera M. Beilicke W. Benbow D. Berge K. Bernlohr C. Boisson 2 O. Bolz V. Borrel 1 I. Braun E. Brion 3 A.M. Brown R. Buhler I. Busching T. Boutelier 4 S. Carrigan P.M. Chadwick L.-M. Chounet 5 G. Coignet 6 R. Cornils L. Costamante B. Degrange H.J. Dickinson A. Djannati-Atai 7 W. Domainko L.O'C. Drury G. Dubus 5 K. Egberts D. Emmanoulopoulos P. Espigat 8 C. Farnier 9 F. Feinstein A. Fiasson 9 A. Forster G. Fontaine 5 Seb. Funk S. Funk M. Fussling Y.A. Gallant 9 B. Giebels 5 J.F. Glicenstein 3 B. Gluck P. Goret 3 C. Hadjichristidis D. Hauser M. Hauser G. Heinzelmann G. Henri G. Hermann J.A. Hinton A. Hoffmann W. Hofmann M. Holleran S. Hoppe D. Horns A. Jacholkowska 9 O.C. de Jager E. Kendziorra M. Kerschhaggl B. Khelifi 5 Nu. Komin 9 K. Kosack G. Lamanna 6 I.J. Latham R. Le Gallou A. Lemière 8 M. Lemoine-Goumard 5 T. Lohse J.M. Martin 2 O. Martineau-Huynh 10 A. Marcowith 1, 9 C. Masterson G. Maurin 8 T.J.L. Mccomb Emmanuel Moulin 3, 9 M. de Naurois D. Nedbal S.J. Nolan A. Noutsos J.-P. Olive 1 K.J. Orford J.L. Osborne M. Panter G. Pedaletti G. Pelletier 4 P.-O. Petrucci 4 S. Pita 8 G. Puhlhofer M. Punch 8 S. Ranchon 6 B.C. Raubenheimer M. Raue S.M. Rayner O. Reimer J. Ripken L. Rob L. Rolland 3 S. Rosier-Lees 6 G. Rowell J. Ruppel V. Sahakian A. Santangelo L. Sauge 4 S. Schlenker R. Schlickeiser R. Schroder U. Schwanke S. Schwarzburg S. Schwemmer A. Shalchi H. Sol 2 D. Spangler R. Steenkamp C. Stegmann G. Superina 5 P.H. Tam J.-P. Tavernet 10 R. Terrier 8 M. Tluczykont 5 C. van Eldik G. Vasileiadis 9 C. Venter J.P. Vialle 6 P. Vincent 10 H.J. Volk S.J. Wagner M. Ward Y. Moriguchi Y. Fukui
Abstract : The complex Monoceros Loop SNR/Rosette Nebula region contains several potential sources of very-high-energy (VHE) gamma-ray emission and two as yet unidentified high-energy EGRET sources. Sensitive VHE observations are required to probe acceleration processes in this region. The H.E.S.S. telescope array has been used to search for very high-energy gamma-ray sources in this region. CO data from the NANTEN telescope were used to map the molecular clouds in the region, which could act as target material for gamma-ray production via hadronic interactions. We announce the discovery of a new gamma-ray source, HESS J0632+058, located close to the rim of the Monoceros SNR. This source is unresolved by H.E.S.S. and has no clear counterpart at other wavelengths but is possibly associated with the weak X-ray source 1RXS J063258.3+054857, the Be-star MWC 148 and/or the lower energy gamma-ray source 3EG J0634+0521. No evidence for an associated molecular cloud was found in the CO data.
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Submitted on : Wednesday, May 16, 2007 - 11:57:39 AM
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F.A. Aharonian, A.G. Akhperjanian, A.R. Bazer-Bachi, B. Behera, M. Beilicke, et al.. Discovery of a point-like very-high-energy gamma-ray source in Monoceros. Astronomy and Astrophysics - A&A, EDP Sciences, 2007, 469, pp.L1-L4. ⟨10.1051/0004-6361:20077299⟩. ⟨in2p3-00147240⟩



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