Spectra of a recent bright burst measured by CGRO-COMPTEL: GRB 990123

Details Spectra of a recent bright burst measured by CGRO-COMPTEL: GRB 990123 Spectra of a recent bright burst measured by CGRO-COMPTEL: GRB 990123

Sep 2000

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000aipc..526..170y&link_type=abstract

GAMMA-RAY BURSTS: 5th Huntsville Symposium. AIP Conference Proceedings, Volume 526, pp. 170-174 (2000).

Computer Science

Gamma-Ray Sources, Gamma-Ray Bursts, Cosmic Rays, Distances, Redshifts, Radial Velocities, Spatial Distribution Of Galaxies, Remote Observing Techniques

Scientific paper

CGRO-COMPTEL measures gamma-ray burst positions, time-histories and spectra in the 0.1-30 MeV energy range, in both imaging ``telescope'' and single detector ``burst spectroscopy'' mode. GRB 990123, one of the most recent bright bursts seen by COMPTEL, was caught in the optical while the gamma-ray emission was ongoing. The burst spectral shape can be characterized by a peak in ν-Fν just below 1 MeV and a power-law tail above (photon index~-2.4,) and flattening below. There is also spectral evolution by downward movement of the peak and/or softening of the power laws. We present light-curves, time resolved spectra and an image map for this burst. .

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