STACEE Observations of Mrk 421 During the 2001 Flare

Astrophysics, abstract
astro-ph/0301369

From: Lowell M. Boone <mothra@scipp.ucsc.edu>

Date: Fri, 17 Jan 2003 22:05:05 GMT   (45kb)

Authors:
STACEE Collaboration,
L.M. Boone,
D. Bramel,
E. Chae,
C.E. Covault,
P. Fortin,
D.M. Gingrich,
D.S. Hanna,
J.A. Hinton,
R. Mukherjee,
C. Mueller,
R.A. Ong,
K. Ragan,
R.A. Scalzo,
D.R. Schuette,
C.G. Theoret,
D.A. Williams

Comments: 6 pages, 6 figures. To appear in proceedings “The Universe Viewed in
Gamma-rays”, Kashiwa, Japan 2002

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.

References and citations for this submission:

SLAC-SPIRES HEP (refers to ,
cited by, arXiv reformatted)