STACEE Observations of Markarian 421 during an Extended Gamma-Ray Outburst | Zendy

L. M. Boone | Zendy; J. A. Hinton | Zendy; D. Bramel | Zendy; Eunmi Chae | Zendy; C. E. Covault | Zendy; P. Fortin | Zendy; D. M. Gingrich | Zendy; D. Hanna | Zendy; R. Mukherjee | Zendy; Carmen Mueller | Zendy; R. A. Ong | Zendy; K. Ragan | Zendy; R. Scalzo | Zendy; Daniel R. Schuette | Zendy; C. G. Théoret | Zendy; D. A. Williams | Zendy

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STACEE Observations of Markarian 421 during an Extended Gamma-Ray Outburst

Author(s) -

L. M. Boone,

J. A. Hinton,

D. Bramel,

Eunmi Chae,

C. E. Covault,

P. Fortin,

D. M. Gingrich,

D. Hanna,

R. Mukherjee,

Carmen Mueller,

R. A. Ong,

K. Ragan,

R. Scalzo,

Daniel R. Schuette,

C. G. Théoret,

D. A. Williams

Publication year - 2002

Publication title -

the astrophysical journal

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 2.376

H-Index - 489

eISSN - 1538-4357

pISSN - 0004-637X

DOI - 10.1086/344815

Subject(s) - physics , astrophysics , galaxy , gamma ray , flux (metallurgy) , light curve , astronomy , metallurgy , materials science

The active galaxy Markarian 421 underwent a substantial outburst in early2001. Between January and May of that year, the STACEE detector was used toobserve the source in gamma-rays between the energies of 50 and 500 GeV. Theseobservations represent the lowest energy gamma-ray detection of this outburstby a ground-based experiment. Here we present results from these observations,which indicate an average integral gamma-ray flux of (8.0 +/- 0.7 +/-1.5)x10^-10 1/cm^2/s. above 140 GeV. We also present a light curve forMarkarian 421 as observed by STACEE from March to May, and compare ourtemporal, as well as spectral, measurements to those of other experiments.

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