Blazar observations above 60 GeV: the Influence of CELESTE's Energy Scale on the Study of Flares and Spectra
arXiv:astro-ph/0501438 · doi:10.1016/j.asr.2005.02.047
Abstract
The CELESTE atmospheric Cherenkov detector ran until June 2004. It has observed the blazars Mrk 421, 1ES 1426+428 and Mrk 501. We significantly improved our understanding of the atmosphere using a LIDAR, and of the optical throughput of the detector using stellar photometry. The new data analysis provides better background rejection. We present our light curve for Mrk 421 for the 2002-2004 season and a comparison with X-ray data and the 2004 observation of 1ES 1426+428. The new analysis will allow a more sensitive search for a signal from Mrk 501.
7 pages, 7 figures, proc. of the 35th COSPAR Scientific Assembly held in Paris, France, July 2004