A gamma-ray burst preceded by X-ray activity

Details A gamma-ray burst preceded by X-ray activity A gamma-ray burst preceded by X-ray activity

Apr 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991natur.350..592m&link_type=abstract

Nature (ISSN 0028-0836), vol. 350, April 18, 1991, p. 592-594.

Astronomy and Astrophysics

Astronomy

79

Gamma Ray Bursts, Neutron Stars, Stellar Activity, X Ray Spectra, Bremsstrahlung, Gamma Ray Spectra, Japanese Spacecraft, Spaceborne Astronomy

Scientific paper

In observations of a gamma-ray burst using the Ginga satellite, X-ray emission was detected in the 2-10 keV energy range about 10 s before the onset of the gamma-ray event, as well as a tail of X-ray emission for about 30 s afterwards. The long timescale and near blackbody spectrum of the precursory X-ray emission suggest that the burst mechanism involves a transition from thermal to nonthermal photon production, and that the energy source for the burst comes from within the neutron star rather than from accretion.

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