Discovery of Gamma-ray Emission from M31 via FERMI-LAT

Details Discovery of Gamma-ray Emission from M31 via FERMI-LAT Discovery of Gamma-ray Emission from M31 via FERMI-LAT

2010-08-15

arxiv.org/abs/1008.2537v1

Astronomy and Astrophysics

Astrophysics

High Energy Astrophysical Phenomena

7 pages, 5 figures

Scientific paper

2 years worth of archival FERMI-LAT data was used to search for the gamma-ray emission from the Andromeda galaxy. The data show no noticeable elliptical image. Subsequent on-off source aperture photometry analysis using a CO image template show a 7 sigma excess in the number of on-source apertures in comparison to the off-source apertures, yielding a flux of (4.95+/-0.71)x10-8 photons cm-2 s-1 for E>100 MeV.

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