Stacee Observations of Extragalactic Sources

Details Stacee Observations of Extragalactic Sources Stacee Observations of Extragalactic Sources

Apr 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002aps..aprn17112m&link_type=abstract

American Physical Society, April Meeting, Jointly Sponsored with the High Energy Astrophysics Division (HEAD) of the American As

Astronomy and Astrophysics

Astrophysics

Scientific paper

The Solar Tower Atmospheric Cherenkov Effect Experiment (STACEE) is a ground-based gamma-ray telescope employing the atmospheric Cherenkov technique. STACEE uses 64 large heliostats at a solar research facility near Albuquerque NM, USA, to achieve a gamma-ray energy threshold below traditional imaging telescopes. The full STACEE experiment started regular observations in October, 2001. An earlier version of the experiment using 48 heliostats took data between January and June of 2001. Here we report the results from STACEE observations of extragalactic sources in 2001 and 2002. The sources observed include the active galaxies Markarian 421, Markarian 501, 3C 66A, and W Comae. We also summarize our future observing plan in the context of measuring the absorbtion of high energy emission due to radiation fields at the source, or in intergalactic space.

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