A Survey of Unidentified EGRET Sources at Very High Energies

Details A Survey of Unidentified EGRET Sources at Very High Energies A Survey of Unidentified EGRET Sources at Very High Energies

May 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005apj...624..638f&link_type=abstract

The Astrophysical Journal, Volume 624, Issue 2, pp. 638-655.

Astronomy and Astrophysics

Astronomy

30

Galaxies: Jets, Gamma Rays: Observations, Surveys

Scientific paper

The Whipple Observatory 10 m γ-ray telescope has been used to survey the error boxes of EGRET unidentified sources in an attempt to find counterparts at energies of 350 GeV and above. Twenty-one unidentified sources detected by EGRET (more than 10% of the total number) have been included in this survey. In no case is a statistically significant signal found in the EGRET error box, which implies that, at least for this sample, the γ-ray spectra of these sources steepen between 100 MeV and 350 GeV. For each EGRET source location, we list candidate associations and derive upper limits on the integral γ-ray flux above 350 GeV.

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