Discovery of Gamma-Ray Emission from M31 with The Fermi-LAT Discovery of Gamma-Ray Emission from M31 with The Fermi-LAT


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Ogelman H., Asaker N., Anilin S., Dereli H., EMRAHOĞLU N. , Yegingil I., ...More

Conference on Astrophysics of Neutron Stars in Honor of M Ali Alpar (ASTRONS), Cesme, Turkey, 2 - 06 August 2010, vol.1379 identifier identifier

  • Publication Type: Conference Paper / Full Text
  • Volume: 1379
  • Doi Number: 10.1063/1.3629489
  • City: Cesme
  • Country: Turkey

Abstract

Two years worth of archival Fermi-LAT data was used to search for gamma-ray emission from M31 (the Andromeda Galaxy). Images of the data show no noticeable elliptical image. Subsequent on/off-source photometry using a CO image template show a 7 sigma excess in the number of on-source apertures in comparison to the off-source apertures, giving a measured flux of (4.945 +/- 0.71) x 10(-8) photons cm(-2) s(-1) for E > 100 MeV.