Spectrum and Variability of Mrk501 as observed by the CAT Imaging Telescope

A. Barrau (1) , R. Bazer-Bachi , H. Cabot , L.M. Chounet (2) , G. Debiais , B. Degrange (2) , J.P. Dezalay , A. Djannati-Ati (1) , D. Dumora (3) , P. Espigat (4) , Benoît Fabre , P. Fleury (2) , G. Fontaine (2) , R. George , C. Ghesquiere (4) , P. Goret , C. Gouiffes , I.A. Grenier , L. Iaccouci (2) , S. Le Bohec (4) , I. Malet , C. Meynadier , P. Munz (4) , T.A. Palfrey , E. Pare (2) , Y. Pons (1) , M. Punch (4) , J. Quebert (3) , K. Ragan (3) , C. Renault (1) , M. Rivoal (1) , L. Rob , P. Schovanek , D.A. Smith (3) , J.P. Tavernet (1) , J. Vrana (2)

1 LPNHE - Laboratoire de Physique Nucléaire et de Hautes Énergies
2 LLR - Laboratoire Leprince-Ringuet
3 CENBG - Centre d'Etudes Nucléaires de Bordeaux Gradignan
4 PCC (UMR 7553) - Physique Corpusculaire et Cosmologie

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 flares. We present also preliminary spectra for all these data, for the low emission state, and for the largest flare.

Domaines: Astrophysique [astro-ph]; Cosmologie et astrophysique extra-galactique [astro-ph.CO]

A. Barrau, R. Bazer-Bachi, H. Cabot, L.M. Chounet, G. Debiais, et al.. Spectrum and Variability of Mrk501 as observed by the CAT Imaging Telescope. Kruger Workshop, Aug 1997, Kruger, South Africa. ⟨in2p3-00013336⟩