GRANAT is the Russian x-ray sattelite launched to the high apogee orbit (200,000 km) and operated almost for 10 years (1989 -1999) , carrying out four major instruments: French SIGMA coded-mask hard x-ray telescope (30-1000 keV), Soviet ART-P coded-mask telescope, all-sky monitor WATCH (6-150 keV), and a gamma-burst detector PHEBUS.

Over the 4 years of pointed observations, GRANAT has observed many galactic and extra-galactic x-ray sources with the emphasis of deep imaging and spectroscopy of the Galactic center region, broad-band observations of black-hole candidates and X-ray Novae.

Since September 1994, GRANAT was in the survey mode. SIGMA carried out the sensitive all-sky survey in the 40-200 keV energy band.

Explore pages devoted to individual GRANAT instruments (including main scientific results):