Performances of the CAT imaging telescope and some preliminary results on Mkn 180 and the Crab
Barrau, A. · Bazer-Bachi, R. · Cabot, H. · Chounet, L. M. · Debiais, G. · Degrange, B. · Dezalay, J. P. · Djannati-Atai, A. · Dumora, D. · Espigat, P. · Fabre, B. · Fleury, P. · Fontaine, G. · George, R. · Ghesquiere, C. · Goret, P. · Gouiffes, C. · Grenier, I. A. · Iacoucci, L. · Bohec, S. Le · Malet, I. · Meynadier, C. · Munz, P. · Palfrey, T. A. · Pare, E. · Pons, Y. · Punch, M. · Quebert, J. · Ragan, K. · Renault, C. · Rivoal, M. · Rob, L. · Schovanek, P. · Smith, D. · Tavernet, J. P. · Vrana, J.
Original · EN
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.
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