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- W92973287 abstract "The Galactic Center has been observed with the CANGAROO-II atmospheric Cherenkov telescope in 2001 and 2002. We have analyzed the data with a likelihood method to discriminate gamma-ray events from background cosmicray events using image parameters. The details of the analysis method and the preliminary results are presented. 1. Introduction Observations of the Galactic Center are being actively pursued at radio, sub-millimeter, infrared, X-ray and gamma-ray wavelengths. They indicate that the central region contains (amongst other components) a super massive black hole, diffuse hot gas and a supernova remnant. The review of Melia and Falcke provides an excellent summary of the latest results [11]. Emission of high energy gamma-rays from the Galactic Center region still remains to be fully exploited, when compared with observations in the lower energy region. EGRET detected a GeV gamma-ray source at the Galactic Center [9]. However, it is not yet clear that whether it is a point source or a diffuse source. Various theories have suggested for the origin of the high energy emission: the accretion disk around the massive black hole [8], the radio arc [13] or supernova remnants [10]. If the high energy radiation continues up to the sub TeV gamma-rays region or has a cut-off in the spectrum in the TeV gamma-ray region, observations with the Imaging Air Cherenkov Telescopes (IACTs) will provide important information to help determine the radiation mechanism." @default.
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- W92973287 date "2003-07-01" @default.
- W92973287 modified "2023-09-27" @default.
- W92973287 title "Very High Energy Gamma-ray Observations of the Galactic Center with the CANGAROO-II telescope" @default.
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