A search for micro cosmic gamma-ray bursts in BATSE one second continuous data

Physics

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Gamma-Ray Sources, Gamma-Ray Bursts

Scientific paper

Based on a previous successful search for untriggered solar microflares we have conducted a search for untriggered cosmic gamma-ray bursts (GRBs). The large number of untriggered hard x-ray solar flares suggests that there might exist a class of GRBs with temporal and spectral properties similar to that of hard x-ray solar flares, possibly with similar physics as well. We have scanned a subset of BATSE's continuous 1 second data from four channels independently. This search can identify GRBs with characteristic rise times longer than 1 second, while the electronic identification system only triggers on rise times of 64-1024 ms. We can also search for softer events, not necessarily SGRs, by including the lowest energy channel. A search of continuous unbiased data can lower the search sensitivity to a minimum determined by the intrinsic and orbit-modulated background. We present the results of our progress.

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