Abstract

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.

Publication Date

2000

Journal Title

AIP Conference Proceedings

Publisher

AIP Publishing

Digital Object Identifier (DOI)

10.1063/1.1361528

Document Type

Conference Proceeding

Rights

© 2000 American Institute of Physics

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