Other
Scientific paper
May 2005
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005gcnew..20....6b&link_type=abstract
GCNEWS - Galactic Center Newsletter, vol. 20, p. 6-12 (eds. S. Markoff, L. Sjouwerman, J. Lazio, C. Lang, R. Schoedel & R. Herrn
Other
Galactic Center, Sgr A*, Gamma-Rays, High Energy
Scientific paper
High energy (HE; E>1 GeV) and very-high-energy (VHE; E>100 GeV) gamma-ray emission has been detected from the Galactic Center (GC) with the EGRET, Whipple, CANGAROO, and HESS experiments. I give an experimentalist's perspective on these results and briefly describe prospects for future observations of the GC at gamma-ray energies. I propose that the current observations may point to as many as three distinct unidentified sources in the GC region. However, the Whipple and HESS results now appear to be consistent in flux and spectrum, and together provide a confirmed detection of a single flat-spectrum source (extending to above 3 TeV) within one arcminute of the position of Sgr A*. To date, the Whipple and HESS observations, provide no evidence for substantial variability over the 10 year period of observations. Future experiments will help to unravel the nature of the high-energy sources; GLAST should be able to clearly pinpoint the position and spectrum of the EGRET unidentified source 3EG J1746-2851 and verify the offset seen in re-analysis of the EGRET data. In the nearer term, HESS should be able to make much more detailed measurements of the angular extent of the source and detect variability, if it exists. When completed in a little over a year, VERITAS should contribute to measurements of the very-high-energy spectrum of the source given its large effective area and good sensitivity at energies above a TeV. Eventually, HESS, VERITAS and CANGAROO should all contribute to coordinated multiwavelength monitoring of Sgr A* and the other sources in the GC region.
No associations
LandOfFree
Very-High-Energy Gamma-Ray Emission from the Galactic Center does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Very-High-Energy Gamma-Ray Emission from the Galactic Center, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Very-High-Energy Gamma-Ray Emission from the Galactic Center will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-772382