Abstract We report the first detection of two soft gamma ray transients GX 354-0 and Nova Persei (GRO J0422+32) by the coded-mask telescope SIGMA. Only preliminary results are presented with regard to Nova Persei while special emphasis is given to the data on GX 354-0 which has been monitored during the 1992 February–April survey of the Galactic Center. GX 354-0 underwent two flares of about two week duration and its average spectrum is well described by a thermal Bremsstrahlung model or a broken power law whereas the Nova Persei spectrum seems to be similar to the one observed for GRS 1124-684 in Musca.
SIGMA observations of two new hard X-ray and soft gamma-ray transients: GX 354-0 and Nova Persei
Advances in Space Research ; 13 , 12 ; 735-738
1993-01-01
4 pages
Article (Journal)
Electronic Resource
English
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