Astronomy and Astrophysics – Astronomy
Scientific paper
Dec 1993
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993adspr..13..735c&link_type=abstract
Advances in Space Research (ISSN 0273-1177), vol. 13, no. 12, p. (12)735-(12)738
Astronomy and Astrophysics
Astronomy
1
Astronomical Models, Gamma Ray Astronomy, Gamma Ray Spectra, Goodness Of Fit, Milky Way Galaxy, Novae, X Ray Sources, Bremsstrahlung, Gamma Ray Telescopes, Heao 2, Iue, Photomasks, Satellite-Borne Instruments, Sky Surveys (Astronomy), Uhuru Satellite
Scientific paper
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-weeks 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.
Ballet Jean
Bouchet Laurent
Churazov Eugene
Claret Antonio
Goldwurm Andréa
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