Search for Ultra-High Energy Emission from Geminga and Five Unidentified EGRET Sources

Details Search for Ultra-High Energy Emission from Geminga and Five Unidentified EGRET Sources Search for Ultra-High Energy Emission from Geminga and Five Unidentified EGRET Sources

May 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993aas...182.3309b&link_type=abstract

American Astronomical Society, 182nd AAS Meeting, #33.09; Bulletin of the American Astronomical Society, Vol. 25, p.847

Astronomy and Astrophysics

Astronomy

Scientific paper

Data from the CYGNUS extensive air shower array were searched for continuous ultra-high energy (UHE) gamma radiation from five unidentified EGRET sources and from the Geminga pulsar. No evidence for continuous emission from any of these objects was found. Data in the Geminga source bin were also searched for pulsed emission using the recent EGRET ephemeris (237 ms period). No evidence of a periodic signal was found. The 90% confidence level upper limit on the continuous gamma-ray flux above 80 TeV for Geminga is 7.9 times 10(-14) cm(-2) s(-1) .

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