Gamma-ray halo around 3C 279: looking through the Sun on the 8th of October

Details Gamma-ray halo around 3C 279: looking through the Sun on the 8th of October Gamma-ray halo around 3C 279: looking through the Sun on the 8th of October

2008-09-29

arxiv.org/abs/0809.4886v2

Mon. Not. Roy. Astron. Soc. 403:L6-L10, 2010

Astronomy and Astrophysics

Astrophysics

6 pages, 4 eps figures, mn2e.cls style; v.2: numerous but minor changes to match the published version

Scientific paper

10.1111/j.1745-3933.2009.00801.x

We discuss how the solar occultations of bright sources of energetic gamma rays can be used to extract non-trivial physical and astrophysical information, including the angular size of the image when it is significantly smaller than the experiment's angular resolution. We analyze the EGRET data and discuss prospects for other instruments. The Fermi Gamma Ray Space Telescope will be able to constrain the size of a possible halo around 3C~279 from observations it makes on the 8th of October each year.

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