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Mrk 421 and 501 above 60 GeV: the Influence of CELESTE's Energy Scale on the Study of Flares and Spectra

E. Brion·the CELESTE collaboration
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Abstract

The CELESTE atmospheric Cherenkov detector ran until June 2004. It has detected several gamma-ray flares of Mrk 421 since 1999. The new data analysis provides better background rejection. We compare our light curves with X-ray data. We significantly improved our understanding of the atmosphere, and of the optical throughput of the detector. This will allow a spectral measurement for Mrk 421 with smaller uncertainties and a more sensitive search for a signal from Mrk 501.

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E. Brion, the CELESTE collaboration. 2004-10-07. Mrk 421 and 501 above 60 GeV: the Influence of CELESTE's Energy Scale on the Study of Flares and Spectra. https://arxiv.org/abs/astro-ph/0410205

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