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Société Française d'Astronomie et d'Astrophysique Scientific Highlights 2004, F. Combes, D. Barret, T. Contini, F. Meynadier and L. Pagani (Ed.) (2004) 423
Mrk 421 and 501 above 60 GeV: the Influence of CELESTE\'s Energy Scale on the Study of Flares and Spectra
E. Brion1
CELESTE Collaboration(s)

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.
1 :  CENBG - Centre d'Etudes Nucléaires de Bordeaux Gradignan
Physique/Astrophysique/Cosmologie et astrophysique extra-galactique
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