Astronomy and Astrophysics – Astrophysics
Scientific paper
1997-10-23
Astronomy and Astrophysics
Astrophysics
6 pages, 3 figures, Latex
Scientific paper
The CAT imaging telesope, which uses the Atmospheric Cherenkov Technique to observe TeV gamma-ray sources, has been operating since September 1996. Located in southern France, it features a fine grained camera consisting of 546 PMT with a pixel size of 0.12 degrees. Strong gamma-ray signals from Mkn 501 above 200 GeV were detected during observations made in April 1997. The high signal/noise ratio for these data enables direct characterization of the gamma-ray images as recorded in the camera. These results are used to validate the Monte-Carlo simulations of the response of the telescope to gamma-ray showers and to improve its performances. Observational results on Mkn 180 and the Crab nebula spectrum are presented.
Barrau Aurelien
Bazer-Bachi R.
Bohec S. Le
Cabot H.
Chounet L.-M.
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