Large-Scale Anisotropy of EGRET Gamma Ray Sources

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dc.creatorAnchordoqui, Luis
dc.creatorMcCauley, Thomas
dc.creatorPaul, Thomas
dc.creatorReimer, Olaf
dc.creatorTorres, Diego F.
dc.date2005-06-24
dc.date.accessioned2026-07-07T02:18:04Z
dc.date.available2026-07-07T02:18:04Z
dc.descriptionIn the course of its operation, the EGRET experiment detected high-energy gamma ray sources at energies above 100 MeV over the whole sky. In this communication, we search for large-scale anisotropy patterns among the catalogued EGRET sources using an expansion in spherical harmonics, accounting for EGRET's highly non-uniform exposure. We find significant excess in the quadrupole and octopole moments. This is consistent with the hypothesis that, in addition to the galactic plane, a second mid-latitude (5^{\circ} < |b| < 30^{\circ}) population, perhaps associated with the Gould belt, contributes to the gamma ray flux above 100 MeV.
dc.descriptionTo be published in Proceedings of ICRC 2005, 29th International Cosmic Ray Conference, Pune, India. http://www.tifr.res.in/icrc2005/
dc.identifierhttps://arxiv.org/abs/astro-ph/0506598
dc.identifierhttp://arxiv.org/abs/astro-ph/0506598
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/9354
dc.subjectAstrophysics
dc.titleLarge-Scale Anisotropy of EGRET Gamma Ray Sources
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