STACEE Observations of Mrk 421 During the 2001 Flare
Abstract
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.
- Publication:
-
arXiv e-prints
- Pub Date:
- January 2003
- DOI:
- 10.48550/arXiv.astro-ph/0301369
- arXiv:
- arXiv:astro-ph/0301369
- Bibcode:
- 2003astro.ph..1369S
- Keywords:
-
- Astrophysics
- E-Print:
- 6 pages, 6 figures. To appear in proceedings "The Universe Viewed in Gamma-rays", Kashiwa, Japan 2002