STACEE Observations of Mrk 421 During the 2001 Flare

Details STACEE Observations of Mrk 421 During the 2001 Flare STACEE Observations of Mrk 421 During the 2001 Flare

2003-01-17

arxiv.org/abs/astro-ph/0301369v1

Astronomy and Astrophysics

Astrophysics

6 pages, 6 figures. To appear in proceedings "The Universe Viewed in Gamma-rays", Kashiwa, Japan 2002

Scientific paper

STACEE is a ground based gamma-ray observatory that uses a heliostat array, built for solar energy research, to detect atmospheric Cherenkov radiation from gamma-ray initiated extensive air showers. During the first half of 2001, a prototype detector, STACEE-48, was used to detect the blazar Markarian 421, which was in an extremely active state. Observations from March to May of 2001 yielded an integral flux of (8.0+/-0.7_{stat}+/-1.5_{sys})x 10^-10 1/cm^2/s at energies above 140+/-20 GeV, and provide some evidence of correlated trends on time scales of a week or more in the GeV and X-ray bands.

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