$Discovery of a point-like very-high-energy \mathsf{\gamma}-ray source in Monoceros$

Discovery of a point-like very-high-energy \mathsf{\gamma}-ray source in Monoceros

Aims. 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. Methods. The HESS...

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Veröffentlicht in:	Astronomy and astrophysics (Berlin) 2007-01, Vol.469 (1), p.L1-L4
Hauptverfasser:	Akhperjanian, A G, Bazer-Bachi, AR, Behera, B, Beilicke, M, Benbow, W, Berge, D, Bernloehr, K, Bolz, O, Borrel, V, Braun, I, Brion, E, Brown, A M, Buehler, R, Buesching, I, Boutelier, T, Carrigan, S, Chadwick, P M, Chounet, L-M, Coignet, G, Costamante, L, Degrange, B, Djannati-Ataie, A, Domainko, W, Drury, LOC, Dubus, G, Egberts, K, Emmanoulopoulos, D, Farnier, C, Feinstein, F, Fiasson, A, Foerster, A, Fontaine, G, Funk, Seb, Funk, S, Gallant, YA, Giebels, B, Glicenstein, J F, Glueck, B, Goret, P, Hadjichristidis, C, Hauser, D, Heinzelmann, G, Hermann, G, Hinton, JA, Hoffmann, A, Hofmann, W, Hoppe, S, Jacholkowska, A, Kerschhaggl, M, Khelifi, B, Latham, I J, Le Gallou, R, Lemoine-Goumard, M, Martineau-Huynh, O, Marcowith, A, Masterson, C, Maurin, G, McComb, TJL, De Naurois, M, Noutsos, A, Olive, J-P, Orford, K J, Osborne, J L, Panter, M, Pedaletti, G, Pelletier, G, Petrucci, P-O, Pita, S, Ranchon, S, Raubenheimer, B C, Raue, M, Ripken, J, Rob, L, Rowell, G, Ruppel, J, Sahakian, V, Santangelo, A, Sauge, L, Schlenker, S, Schlickeiser, R, Schroeder, R, Schwanke, U, Schwarzburg, S, Shalchi, A, Sol, H, Steenkamp, R, Superina, G, Tam, PH, Tavernet, J-P, Terrier, R, Tluczykont, M, Van Eldik, C, Vasileiadis, G, Venter, C, Vialle, J P, Vincent, P, Voelk, HJ, Wagner, S J, Ward, M, Moriguchi, Y
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Sprache:	eng
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Zusammenfassung:	Aims. 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. Methods. The HESS 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. Results. We announce the discovery of a new \gamma-ray source, HESS J0632+057, located close to the rim of the Monoceros SNR. This source is unresolved by HESS 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.
ISSN:	0004-6361
DOI:	10.1051/0004-6361:20077299