Description
This is the fourth catalogue of the BATSE instrument on board of the Compton Gamma-ray Observatory (CGRO), launched on April 5, 1991. It contains the locations and times for 1637 triggered gamma-ray bursts (nominal energy range 50-300keV) observed from 19 April, 1991 until 29 August, 1996. This 4Br version has been revised from the version first circulated on CD-ROM in September 1997 (4B, file "4b.dat") to include improved locations for a subset of bursts that have been reprocessed using additional data. The Interplanetary Network (IPN) localization information for 147 gamma-ray bursts observed by the Burst and Transient Source Experiment between the end of the Third BATSE catalog and the end of the Fourth BATSE catalog, obtained by analyzing the arrival times of these bursts at the Ulysses and Compton Gamma-Ray Observatory (CGRO) spacecraft. are included in the table "ulysses.dat". Bursts found later (1607 triggers until 9 September 2000) are included in the file "grb.dat"; the data related to these events (those having a TrigNo>=5589) should be considered as preliminary. The Exposure table and Trigger Criteria tables are not included here; please consult the statistical results on the BATSE pages (http://gammaray.msfc.nasa.gov/batse/)
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