Resolving Point Sources with the Next Generation High Energy Gamma-Ray Telescope

Details Resolving Point Sources with the Next Generation High Energy Gamma-Ray Telescope Resolving Point Sources with the Next Generation High Energy Gamma-Ray Telescope

Dec 1997

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997aas...191.5208c&link_type=abstract

American Astronomical Society, 191st AAS Meeting, #52.08; Bulletin of the American Astronomical Society, Vol. 29, p.1300

Astronomy and Astrophysics

Astronomy

Scientific paper

The next generation high energy (MeV-GeV) gamma-ray telescope will be sensitive enough to detect point sources at least an order of magnitude fainter than EGRET can detect. We used EGRET measurements of the extragalactic background and the high-latitude source counts to extrapolate the source counts to low fluxes, and found that as many as 50,000 sources with |b|>10arcdeg may have fluxes above the threshold of the next generation telescope. In order to resolve these sources, the new instrument must have adequate angular resolution. We will demonstrate the relationship between instrument sensitivity and the resulting angular resolution requirements, and discuss ways of achieving those requirements.

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