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  Very high energy observations of the starburst galaxy NGC 253 with H.E.S.S.

Lemoine-Goumard, M., Hinton, J. A., & Völk, H. J. (2005). Very high energy observations of the starburst galaxy NGC 253 with H.E.S.S. In B. S. Acharya, S. Gupta, P. Jagadeesan, A. Jain, S. Karthikeyan, S. Morris, et al. (Eds.), Proceedings of the 29th International Cosmic Ray Conference (pp. 283-286). Navy Nagar, Colaba, Mumbai, MH-400005: Tata Institute of Fundamental Research.

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Item Permalink: https://hdl.handle.net/11858/00-001M-0000-0011-87A5-5 Version Permalink: https://hdl.handle.net/11858/00-001M-0000-0011-87A6-3
Genre: Conference Paper

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 Creators:
Lemoine-Goumard, M.1, Author
Hinton, J. A.2, Author           
Völk, Heinrich J.3, Author           
J. Hinton for the H.E.S.S. Collaboration, Editor  
Affiliations:
1Laboratoire Leprince-Ringuet, IN2P3/CNRS, Ecole Polytechnique, F-91128 Palaiseau, France, ou_persistent22              
2Division Prof. Dr. Werner Hofmann, MPI for Nuclear Physics, Max Planck Society, ou_904550              
3Prof. Heinrich J. Völk, Emeriti, MPI for Nuclear Physics, Max Planck Society, ou_907548              

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 Abstract: 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 con dence 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.

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Language(s): eng - English
 Dates: 2005-12
 Publication Status: Issued
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Type: -
 Identifiers: eDoc: 282099
 Degree: -

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Title: 29th International Cosmic Ray Conference
Place of Event: Pune, India
Start-/End Date: 2005-08-03 - 2005-08-10

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Title: Proceedings of the 29th International Cosmic Ray Conference
Source Genre: Proceedings
 Creator(s):
Acharya, B. Sripathi, Editor
Gupta, Sunil, Editor
Jagadeesan, P., Editor
Jain, Atul, Editor
Karthikeyan, S., Editor
Morris, Samuel, Editor
Tonwar, Suresh, Editor
Affiliations:
-
Publ. Info: Navy Nagar, Colaba, Mumbai, MH-400005 : Tata Institute of Fundamental Research
Pages: - Volume / Issue: - Sequence Number: - Start / End Page: 283 - 286 Identifier: -