SIMBAD references

2002ApJ...579L...5B - Astrophys. J., 579, L5-L8 (2002/November-1)

STACEE observations of Markarian 421 during an extended gamma-ray outburst.

BOONE L.M., HINTON J.A., BRAMEL D., CHAE E., COVAULT C.E., FORTIN P., GINGRICH D.M., HANNA D.S., MUKHERJEE R., MUELLER C., ONG R.A., RAGAN K., SCALZO R.A., SCHUETTE D.R., THEORET C.G. and WILLIAMS D.A.

Abstract (from CDS):

The active galaxy Markarian 421 underwent a substantial outburst in early 2001. Between January and May of that year, the STACEE detector was used to observe the source in γ-rays between the energies of 50 and 500 GeV. These observations represent the lowest energy γ-ray detection of this outburst by a ground-based experiment. Here we present results from these observations, which indicate an average integral γ-ray flux of (8.0±0.7±1.5)x10–10.cm–2.s–1 above 140 GeV. We also present a light curve for Markarian 421 as observed by STACEE from March to May and compare our temporal, as well as spectral, measurements with those of other experiments.

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Journal keyword(s): Galaxies: BL Lacertae Objects: Individual: Name: Markarian 421 - Galaxies: Active - Gamma Rays: Observations

Simbad objects: 6

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