BATSE4B ivo://nasa.heasarc/batse4b NASA/GSFC HEASARC Meegan et al. 2026-06-12 NASA/GSFC HEASARC help desk heasarc-vo at athena.gsfc.nasa.gov GRB This database table comprises the 4th BATSE Gamma-Ray Burst Catalog, hereafter referred to as 4B. It specifies the locations and times for 1637 triggered gamma-ray bursts observed from 19 April, 1991 until 29 August, 1996. It therefore includes the data from the 3B catalog. The only revisions from the 3B catalog are improved locations for the trigger #s 741, 2311, and 3155. Bursts since the end of the 1B catalog (March 1992) occurred when the Compton Gamma-Ray Observatory (CGRO) tape recorders were experiencing numerous errors. Consequently, there are gaps in the data of many bursts that preclude valid measurement of peak flux, peak rate, fluence, or duration. Peak rates on the 1 second timescale from each detector are almost always available. These data (called MAXBC rates) can be used to determine burst location. Previous difficulties with this data type have been largely removed, and we now believe that the systematic errors for MAXBC-located bursts are the same as for bursts located with other data types. It is still true however, that the MAXBC-located bursts usually have larger statistical errors than would be the case if another data type were available. The parameter called comments_position in this database contains comments on MAXBC-located bursts. A number of CGRO and BATSE flight software changes have significantly reduced the problem of data gaps since March of 1993. This database table was created by the HEASARC in March 1999, based on data supplied by the CGRO Science Support Center. This is a service provided by NASA HEASARC . 1998hgrb.symp....3M https://heasarc.gsfc.nasa.gov/W3Browse/all/batse4b.html Catalog Research served-by HEASARC TAP https://heasarc.gsfc.nasa.gov/xamin/vo/cone?showoffsets&table=batse4b& GET text/xml 180 99999 true 161.51 -87.81 5 https://heasarc.gsfc.nasa.gov/xamin/vo/tap https://heasarc.gsfc.nasa.gov/cgi-bin/W3Browse/getvotable.pl?name=batse4b GET text/xml https://heasarc.gsfc.nasa.gov/cgi-bin/W3Browse/w3query.pl?tablehead=name=heasarc_batse4b&Action=More+Options&Action=Parameter+Search&ConeAdd=1 CGRO 5 Gamma-ray public batse4b CGRO/BATSE 4B Catalog trigger_num BATSE Trigger Number meta.id short nullable name BATSE Catalog Burst Name meta.id;meta.main char nullable ra Right Ascension degree pos.eq.ra;meta.main double nullable dec Declination degree pos.eq.dec;meta.main double nullable "time" Burst Trigger Time (MJD UT) mjd time.epoch double nullable flux_64 Peak Flux on 64-ms Timescale photon/cm^2/s phot.flux.density;em.gamma.soft float nullable flux_64_error Error in 64-ms Peak Flux stat.error;phot.flux.density;em.gamma.soft float nullable flux_256 Peak Flux on 256-ms Timescale photon/cm^2/s phot.flux.density;em.gamma.soft float nullable lii Galactic Longitude degree pos.galactic.lon double nullable t50_error Uncertainty in T50 Duration s stat.error;time.interval float nullable comments_duration Comments on Burst Duration meta.note;time.interval char nullable earth_angle Angle of Geocenter (angle between burst and nadir as measured from satellite) degree instr.offset float nullable t50_start T50 Start Time, Relative to Trigger s time.start;obs float nullable fluence_3 Fluence for Channel 3 erg/cm^2 phot.fluence;em.gamma.soft double nullable t90_error Uncertainty in T90 Duration s stat.error;time.interval float nullable overwrite Overwrite Flag (Y if this burst overwrote an earlier, weaker trigger) instr.setup char nullable comments_position Comments on Burst Coordinates meta.note;pos char nullable comments_general General Comments meta.note char nullable comments_quality Comments on Data Quality meta.code.qual char nullable fluence_1 Fluence for Channel 1 erg/cm^2 phot.fluence;em.X-ray.hard double nullable max_cts_1024 Maximum Counts on 1024-ms Timescale stat.snr;em.gamma.soft float nullable day_trigger Trigger Truncated Julian Date TJD time.epoch int nullable flux_1024 Peak Flux on 1024-ms Timescale photon/cm^2/s phot.flux.density;em.gamma.soft float nullable threshold_1024 Trigger Threshold on 1024-ms Timescale instr.sensitivity float nullable flux_1024_error Error in 1024-ms Peak Flux photon/cm^2/s stat.error;phot.flux.density;em.gamma.soft float nullable threshold_256 Trigger Threshold on 256-ms Timescale instr.sensitivity float nullable flux_64_time Time of the 64-ms Peak Flux, Relative to Trigger s time.epoch;phot.flux.density;em.gamma.soft float nullable bii Galactic Latitude degree pos.galactic.lat double nullable max_cts_64 Maximum Counts on 64-ms Timescale stat.snr;em.gamma.soft float nullable comments_otherobs Comments on Other Instruments meta.note;instr char nullable fluence_4 Fluence for Channel 4 erg/cm^2 phot.fluence;em.gamma.soft double nullable overwritten Overwritten Flag (Y if this burst overwritten by later, more intense trigger) instr.setup char nullable threshold_64 Trigger Threshold on 64-ms Timescale instr.sensitivity float nullable fluence_2_error Error for Channel-2 Fluence erg/cm^2 stat.error;phot.fluence;em.X-ray.hard double nullable seconds_trigger Trigger Seconds (UT) Since Beginning of Day s time.epoch double nullable flux_256_error Error in 256-ms Peak Flux photon/cm^2/s stat.error;phot.flux.density;em.gamma.soft float nullable fluence_1_error Error for Channel-1 Fluence erg/cm^2 stat.error;phot.fluence;em.X-ray.hard double nullable t90_start T90 Start Time, Relative to Trigger s time.start;obs float nullable fluence_4_error Error for Channel-4 Fluence erg/cm^2 stat.error;phot.fluence;em.gamma.soft double nullable flux_256_time Time of the 256-ms Peak Flux, Relative to Trigger s time.epoch;phot.flux.density;em.gamma.soft float nullable t90 90% Burst Duration (seconds) s time.interval float nullable max_cts_256 Maximum Counts on 256-ms Timescale stat.snr;em.gamma.soft float nullable t50 50% Burst Duration (seconds) s time.interval float nullable error_radius Radius of Positional Error Box degree stat.error;pos float nullable flux_1024_time Time of the 1024-ms Peak Flux, Relative to Trigger s time.epoch;phot.flux.density;em.gamma.soft float nullable fluence_2 Fluence for Channel 2 erg/cm^2 phot.fluence;em.X-ray.hard double nullable fluence_3_error Error for Channel-3 Fluence erg/cm^2 stat.error;phot.fluence;em.gamma.soft double nullable "__x_ra_dec" System unit vector column double nullable "__y_ra_dec" System unit vector column double nullable "__z_ra_dec" System unit vector column double nullable "__row" System index column char nullable