BATSE gamma-ray burst line search. I. Search for narrow lines in spectroscopy detector data

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Analysis of data from the Spectroscopy Detectors (SDs) of the Burst and Transient Source Experiment (BATSE) on the Compton Gamma Ray Observatory (GRO) has found no convincing line features in the spectra of gamma-ray bursts (GRBs) in almost 3 years of operation, in contrast to expectations based on results from other experiments. In this Letter we discuss the visual search for narrow lines in the SD data. The search has examined 192 bursts, of which ∼18 were intense enough that lines similar to those seen by instruments on the Ginga satellite would have been visible between ∼20 and ∼100 keV. A simplified calculation shows that the BATSE and Ginga results are consistent at the 13% level.

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Astrophysical Journal

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