Computer Science
Scientific paper
Oct 2008
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008ycat..34890849c&link_type=abstract
VizieR On-line Data Catalog: J/A+A/489/849. Originally published in: 2008A&A...489..849C
Computer Science
Scientific paper
We present a catalog of point gamma-ray sources detected by the EGRET detector on the Compton Gamma Ray Observatory. We used the entire gamma-ray dataset of reprocessed photons at energies above 100MeV and new Galactic interstellar emission models based on CO, HI, dark gas, and interstellar radiation field data. Two different assumptions are used to describe the cosmic-ray distribution in the Galaxy to analyse the systematic uncertainties in source detection and characterization.
We applied a 2-dimensional maximum-likelihood detection method similar to that used to analyze the 3rd EGRET catalogue.
The revised catalogue lists 188 sources, 14 of which are marked as confused, in contrast to the 271 entries of the 3rd EGRET (3EG) catalogue. We do not detect 107 sources discovered previously because additional structure is present in the interstellar background.
(5 data files).
Casandjian Jean-Marc
Grenier Isabelle A.
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