X-ray and gamma-ray astronomy

Various papers on X-ray and gamma-ray astronomy are presented. Among the topis addressed are: studies of compact objects with Einstein, astronomy with Exosat, highlights from the Kvant mission, hard X-ray and 50-500 MeV observations of SN 1987A, progress in gamma-ray burst astronomy with Ginga, highlights from the COS-B mission, gamma rays and interstellar gas in the Cepheus region, gamma-rays from dark clouds, 15-100 keV variability in Her X-1 observed by HEAO-1, Exosat observations of the iron line in Cen X-3, stellar X-ray astronomy, active neutron stars, magnetic activity in interbinary regions, search for optical counterparts of gamma-ray transients, gamma-ray constraints on the Galactic halo, X-ray and gamma-ray continuum of AGN, clusters of galaxies and the hot intracluster medium, the Granat project, the Astro-D mission, the Advanced X-ray Astrophysics Facility, the high-throughput X-ray Spectroscopy Mission, the X-ray Astronomy Mission SAX, and the X-ray Timing Explorer.