The imaging COMPTEL telescope has accumulated 0.1–30 MeV spectra, time-histories, and positions of more than forty γ-ray bursts within its ∼3 sr field of view in the eight years since its launch. CGRO-COMPTEL measures in both imaging “telescope” and single detector “burst spectroscopy” mode. In an ongoing collaboration with BACODINE/GCN, bursts are imaged automatically, with localizations relayed to a global network of multiwavelength observers in near real time (∼10 minutes). We have updated our burst search procedure in two ways: 1) using more sensitive search algorithms; and 2) using data from more detectors. The first are double change-point algorithms. With these we can find regions of significant excess flux with no assumptions on the wide range of burst time-scales (e.g., rise-times or decay-times) or intensities, and only one adjustable parameter (the time-averaged count-rate of the detectors). This makes it simpler to combine information on burst time-histories from the larger effective area (but cruder time bins) burst spectroscopy detectors, and hence better pinpoint the best times for imaging each burst. We report the eight bursts detected during 1998–1999.
Space Science Center, Physics
AIP Conference Proceedings
Digital Object Identifier (DOI)
MeV measurements of γ-ray bursts by CGRO-COMPTEL: Revised catalog Connors, A. and Young, C. A. and Bennett, K. and Collmar, W. and Hermsen, W. and Kippen, R. M. and Kuiper, L. and McConnell, M. and Miller, R. and Ryan, J. M. and Schönfelder, V. and Williams, O. R. and Winkler, C., AIP Conference Proceedings, 526, 28-32 (2000), DOI:http://dx.doi.org/10.1063/1.1361501
© 2000 American Institute of Physics