SMM hard X-ray observations of the soft gamma-ray repeater 1806-20

Details SMM hard X-ray observations of the soft gamma-ray repeater 1806-20 SMM hard X-ray observations of the soft gamma-ray repeater 1806-20

Nov 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987apj...322l..21k&link_type=abstract

Astrophysical Journal, Part 2 - Letters to the Editor (ISSN 0004-637X), vol. 322, Nov. 1, 1987, p. L21-L25. CNES-supported resea

Astronomy and Astrophysics

Astronomy

59

Astronomical Spectroscopy, Gamma Ray Bursts, Solar Maximum Mission, Spaceborne Astronomy, X Ray Spectroscopy, Spatial Distribution, Spectrum Analysis, Temporal Distribution, Temporal Resolution

Scientific paper

A new type of gamma-ray source has been recently discovered. Six bursts from this source were recorded with the Hard X-Ray Burst Spectrometer on the Solar Maximum Mission during a highly active phase in 1983. High time resolution measurements of one burst show rise and decay times of less than 5 ms, the fastest yet observed from this source. Time profiles of these events are simple, but indicate low-level emission before and after the main peaks. Two transients in the series show no spectral evolution over their durations of fractions of a second. Bursts from soft gamma-ray repeaters (SGRs) appear to form a separate class of events. The characteristic properites of the three known SGRs are briefly reviewed.

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