1997/05/30 by A. Barrau, R. Bazer‐Bachi, R. Bazer-Bachi +82
Medicine · Physics and Astronomy · #Astrophysics (astro-ph) #Astrophysics and Cosmic Phenomena #Dark Matter and Cosmic Phenomena #FOS: Physical sciences #Radiation Therapy and Dosimetry #astro-ph
paper · pdf · doi:10.48550/arxiv.astro-ph/9705248
5 pages, 3 figures, Tex, contribution to 25th ICRC Durban
arxiv created 1997/05/30 · openalex publication_date 1997/05/30 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
The CAT imaging telescope, recently built on the site of the former solar plant Themis (French Pyrenees), observed gamma-rays from the Crab nebula from October 1996 to March 1997. This steady source, often considered as the standard candle of very-high-energy gamma-ray astronomy, is used as a test-beam to probe the performances of the new telescope, particularly its energy threshold (220 GeV at 20 degrees zenith angle) and the stability of its response. Due to the fine-grain camera, an accurate analysis of the longitudinal profiles of shower images is performed, yielding the source position in two dimensions for each individual shower.