7 papers
GRB010921: Localization and Observations by the HETE Satellite
G. Ricker, K. Hurley, D. Lamb +36
On September 21 at 18950.56 SOD (05:15:50.56) UT the FREGATE gamma-ray instrument on the High Energy Transient Explorer (HETE) detected a bright gamma-ray burst (GRB). The burst wa…
Very High Energy Gamma-ray spectral properties of Mrk 501 from CAT Cerenkov telescope observations in 1997
A. Djannati-Atai, F. Piron, A. Barrau +31
The BL Lac object Mrk 501 went into a very high state of activity during 1997, both in VHE gamma-rays and X-rays. We present here results from observations at energies above 250 Ge…
Performances of the CAT imaging telescope and some preliminary results on Mkn 180 and the Crab
A. Barrau, R. Bazer-Bachi, H. Cabot +33
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 f…
Spectrum and Variability of Mrk501 as observed by the CAT Imaging Telescope
A. Barrau, R. Bazer-Bachi, H. Cabot +33
The CAT Imaging Telescope has observed the BL Lac object Markarian 501 between March and August 1997. We report here on the variability over this time including several large flare…
Detection of Vhe Gamma-Rays from MRK 501 with the Cat Imaging Telescope
A. Barrau, R. Bazer-Bachi, H. Cabot +33
The CAT imaging telescope on the site on the former solar plant Themis has been observing gamma-rays from Mrk501 above 220 GeV in March and April 1997. This source is shown to be h…
Observation of the Crab Nebula Gamma-Ray Emission Above 220 Gev by the Cat Cherenkov Imaging Telescope
A. Barrau, R. Bazer-Bachi, H. Cabot +33
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.…