Astronomy and Astrophysics – Astrophysics
Scientific paper
Mar 2002
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002aps..css.c1004l&link_type=abstract
American Physical Society, California Section Spring Meeting, March 29-30, 2002 Davis, CA, Meeting ID: CSS02, abstract #C1.004
Astronomy and Astrophysics
Astrophysics
Scientific paper
An abondoned solar power plant has been converted to an instrument for measuring the Cherenkov light component of extensive air showers induced by cosmic particles. The Atmospheric Gamma Ray Observatory (AGRO) has been operating during the Winter months of 2001-02 and a large sample of Cherenkov events has been collected. Our prelimary results indicate an excess of gamma ray showers emanating from the direction of the Crad Nebula, which is a known gamma ray source and the standard candle of gamma ray astrophysics. Further improvements to the detector will consist of lowering of the energy threshold and dramatic increase in data collection efficiency. Present day detectors, with their thresholds in the 100-200 GeV range are unable to measure extinction properties of AGN spectra, thus limiting their ability to constrain the inter-galactic infra-red photon density. I will present a discussion of a technique and algorithms that will make this possible.
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