BATSE Home Page The BATSE Current Gamma-Ray Burst Catalog

The BATSE Burst Team has a policy of making gamma-ray burst data available to the scientific community as soon as possible. Several of the GRB catalog tables are released to the public as they are generated and before publication as an official catalog. These data should be considered preliminary, and the BATSE Science Team reserves the right to update these tables at any time before publication in the official catalog.

Triggers 105 through 5586, which are gamma-ray bursts up to 29 August, 1996, are published as the BATSE 4B Catalog. This catalog contains 1637 gamma-ray bursts.

In analyzing these data, it is important to note that the trigger criteria, including the energy range, have been changed quite often since the end of the 3B catalog. Information about trigger criteria during the BATSE lifetime is contained in the Trigger Criteria Table.

The BATSE trigger numbers correlate all the tables of the catalog. The trigger number is a running sequence of BATSE triggers that include cosmic bursts, solar flares and other events. The sequence begins with trigger 105. The Basic Information Table contains all of the gamma-ray burst triggers, while the remaining tables contain subsets of these triggers.

Table Name Description
Basic The BATSE trigger number, burst name, time of trigger, derived source direction, angle from geocenter to burst direction, information about burst overwrites for each burst. An explanation of the file format is available.
Last updated September 9, 2000
Number of events 2702
Flux and Fluence Includes BATSE trigger number, peak flux on the 64 ms, 256 ms, and 1.024 s trigger timescales, and fluences in four energy channels for each burst. An explanation of the file format is available.
Last updated July 27, 2000
Number of events 2135

Note: this table contains events after the end of the 4B Catalog only. For the full set of Flux/Fluence, you also need the 4B Catalog Table. The total number of events is shown above.
CMAX/CMIN The table gives the BATSE trigger number, cmax/cmin and cmin values for the 64 ms, 256 ms and 1.024 s trigger timescales for each burst.
Last updated August 1, 2003
Duration The table gives the BATSE trigger number, and the durations required for integration of 50% and 90% of the burst fluence for each burst. An explanation of the file format is available.
Last updated August 17, 2000
Number of events 2041
Comments1 Includes BATSE trigger number and free form comments for each burst.
Exposure1 The sky exposure as a function of declination is given for the 4B Catalog and several subsets.
Trigger Efficiency1 Describes the fraction of time a burst will be triggered on each of the trigger timescales as a function of GRB intensity.
Trigger Criteria1 Trigger threshold and energy range vs. time.

1. These tables are not updated regularly. Please consult the 4B GRB Catalog tables.


BATSE GRB Catalogs

Catalog Name End Trigger Number of Triggers End TJD End Date
1B 1466 263 8687 920306
2B 2230 586 9055 930309
3B 3174 1122 9615 940920
4B 5586 1637 10324 960829

Please return to the BATSE Catalog Page or the BATSE Home Page or the Gamma Ray Astrophysics Home Page.

Modification date: 12 Sep, 2001

Author BATSE GRB Team
Responsible Manager Steve Elrod
Site Curator Valerie Connaughton