| ID:
282099.0,
MPI für Kernphysik / High-Energy Astrophysics |
Very high energy observations of the starburst galaxy NGC 253 with
H.E.S.S. |
| Authors: | Lemoine-Goumard, M.; Hinton, J. A.; Völk, Heinrich J. |
| Language: | English |
| Corporate body: | J. Hinton for the H.E.S.S. Collaboration |
| Research Context: | Gamma Ray Astronomy |
| Publisher: | Tata Institute of Fundamental Research |
| Place of Publication: | Navy Nagar, Colaba, Mumbai, MH-400005 |
| Date of Publication (YYYY-MM-DD): | 2005-12 |
| Title of Proceedings: | Proceedings of the 29th International Cosmic Ray Conference |
| Start Page: | 283 |
| End Page: | 286 |
| Volume (in Series): | 10,4 |
| Name of Conference/Meeting: | 29th International Cosmic Ray Conference |
| Place of Conference/Meeting: | Pune, India |
(Start) Date of Conference/Meeting
(YYYY-MM-DD): | 2005-08-03 |
End Date of Conference/Meeting
(YYYY-MM-DD): | 2005-08-10 |
| Review Status: | not specified |
| Audience: | Experts Only |
| Abstract / Description: | We present the result of 28 hours of observations of the nearby starburst galaxy NGC 253 with the H.E.S.S.Cherenkov telescopes in 2003. Gamma-ray emission above 400 GeV from NGC 253 was reported by the CANGAROO collaboration in 2002. We find no evidence for very high energy for very high energy gamma-ray emission from this object and we derive upper limits on the ux above 300 GeV of 1.9-12 photons cm-2 s-1 for a point-like source and 6.3 x 10 -12 photons cm
-2 s-1 for a source of size 0.5° as reported by CANGAROO, both at a condence level of 99%. These upper limits are inconsistent with the spectrum reported by CANGAROO. The expected very high energy gamma-ray emission from this object is discussed in the framework of a galactic wind prolongation model. |
| Free Keywords: | Hess |
| External Publication Status: | published |
| Document Type: | Conference-Paper |
| Affiliations: | MPI für Kernphysik/Group H. J. Völk/High Energy Astrophysics (F. Aharonian)
MPI für Kernphysik/Group W. Hofmann/Experimental High-Energy Astrophysics (M. Panter, G. Hermann)
|
| External Affiliations: | Laboratoire Leprince-Ringuet, IN2P3/CNRS, Ecole Polytechnique, F-91128 Palaiseau, France
|
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