Astronomy and Astrophysics – Astrophysics
Scientific paper
2002-12-20
for the proceedings of the 34th COSPAR Scientific Assembly of the Second World Space Congress Houston, TX, USA, 10-19 October
Astronomy and Astrophysics
Astrophysics
6 pages, 4 figures
Scientific paper
Using the EGRET data and an improved point source analysis, including an energy dependent point spread function and an unbinned maximum likelihood technique, we have been able to place considerably lower limits on the gamma ray flux from the galactic center region. We also test this method on known sources, the Crab and Vela pulsars. In both cases, we find that our method improves the angular precision of EGRET data over the 3EG catalog. This new limit on gamma rays from the galactic center can be used to test models of annihilating supersymmetric dark matter and galactic halo profiles. We find that the present EGRET data can limit many supersymmetric models if the density of the galactic dark matter halo is cuspy or spiked toward the galactic center. We also discuss the ability of GLAST to test these models.
Dingus Brenda
Hooper Dan
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