Correlated variability of MKN 421 at X-ray and TeV wavelengths on time scales of hours
/ Authors
L. Maraschi, G. Fossati, F. Tavecchio, L.Chiappetti, A. Celotti, G. Ghisellini, P. Grandi, E. Pian, G. Tagliaferri, A. Treves
and 19 more authors
A.C.Breslin, J.H.Buckley, D.A.Carter-Lewis, M.Catanese, M.F.Cawley, D.J.Fegan, S.Fegan, J.Finley, J.Gaidos, Thall, A.M.Hillas, F.Krennrich, R. Lessard, C.Masterson, P.Moriarty, J.Quinn, J.Rose, F.Samuelson, T.C.Weekes
/ Abstract
Abstract Mkn 421 was observed for about two days with BeppoSAX, prior to and partly overlapping the start of a 1 week continuous exposure with ASCA in April 1998, as part of a world-wide multiwavelength campaign. A pronounced, well-defined flare observed in X-rays was also observed simultaneously at TeV energies by the Whipple Observatory's 10 m gamma-ray telescope. These data provide the first evidence that the X-ray and TeV intensities are well correlated on time scales of hours.
Journal: Astroparticle Physics