Transient Gamma-Ray Spectrometer Observation of the Bright Gamma-Ray Burst GRB 950822

Details Transient Gamma-Ray Spectrometer Observation of the Bright Gamma-Ray Burst GRB 950822 Transient Gamma-Ray Spectrometer Observation of the Bright Gamma-Ray Burst GRB 950822

Dec 1997

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997apj...491..697s&link_type=abstract

Astrophysical Journal v.491, p.697

Astronomy and Astrophysics

Astronomy

3

Gamma Rays: Bursts, Gamma Rays: Observations

Scientific paper

The Transient Gamma-Ray Spectrometer (TGRS) on the Wind satellite is designed to perform spectroscopy of bright gamma-ray bursts in the ~20-8000 keV energy range, having a resolution 5-30 times better than that of earlier generation detectors. GRB 950822 was the brightest burst observed by TGRS in its first year of operation, with a peak flux (1024 ms) of ~78.3 photons cm-2 s-1 and a fluence (50-300 keV) of ~1.4 x 10-4 ergs cm-2; therefore, the GRB data in this paper represent the first high-resolution spectroscopy ever performed on a burst of this brightness. The continuum spectrum of GRB 950822 has the classical gamma-ray burst shape and exhibits typical evolution from hard to soft over the course of the burst. We found no evidence of line features or any other spectral fine structure with significance greater than 3.5 sigma in our data.

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