3 papers
astro-ph1999
X-ray Rapid Variability of MKN 421
A. Treves, Y. H. Zhang, F. Tavecchio +7
We present a detailed Cross Correlation analysis of the light curves of the X-ray bright BL Lac object Mkn 421 observed with SAX period 1997-1998. Monte Carlo simulations ar…
astro-ph1998
Fast X-ray Variability of PKS 2155-304: A Cross Correlation Analysis
A. Treves, Y. H. Zhang, A. Celotti +7
PKS 2155-304 is one of the prototypes of BL Lac objects. Its spectral energy distribution is known from the radio to the TeV band and has two peaks, one in the soft X-rays and the…
astro-ph1998
BeppoSAX Observations of PKS 2155-304 during an active Gamma-ray State
L. Maraschi, L. Chiappetti, F. Tavecchio +8
PKS 2155-304 was observed with BeppoSAX in November 1997 for 64 ksec (total elapsed time 33.5 hours) and, for the first time, simultaneously in gamma-rays with EGRET on board the C…