Multiwavelength Observations of Short Time-scale Variability in Ngc 4151 . Iii . X-ray and Gamma-ray Observations

A series of ROSAT, ASCA and Compton Gamma-Ray Observatory (CGRO) observations of the Seyfert galaxy NGC 4151 were carried out during the period 1993 November 30 to December 13 as part of an intensive campaign to study the multiwavelength spectral characteristics of its short time-scale variability. In the softest X-ray bands monitored by ROSAT (0.1–0.4 keV… CONTINUE READING