Hard x‐rays from supernova 1987A: results of MIR‐KVANT and GRANAT in 1987‐1990 and expectations

Results of the Supernova 1987A hard X‐ray observations in 1987‐1990 with MIR‐KVANT and GRANAT are presented. They allow to estimate degree of 56Co mixing over the envelope and set hard restrictions on abundances of radioactive 57Co, 44Ti and 22Na produced during the outburst. The upper limit at three standard deviation level on the 57Co/56Co ratio inside the envelope is equal to 1.5 of the Earth’s 57Fe/56Fe ratio. Future evolution of the SN1987A hard X‐ray luminosity connected mainly with central source is discussed.