J/ApJS/126/19       BATSE gamma-ray burst spectral catalog. I. (Preece+, 2000)

The BATSE gamma-ray burst spectral catalog. I. High time resolution spectroscopy of bright bursts using high energy resolution data. Preece R.D., Briggs M.S., Mallozzi R.S., Pendleton G.N., Paciesas W.S., Band D.L. <Astrophys. J. Suppl. Ser. 126, 19 (2000)> =2000ApJS..126...19P 2000ApJS..126...19P
ADC_Keywords: Gamma rays Mission_Name: CGRO Keywords: catalogs - gamma rays: bursts Abstract: This is the first in a series of gamma-ray burst spectroscopy catalogs from the Burst and Transient Source Experiment (BATSE) on the Compton Gamma Ray Observatory, each covering a different aspect of burst phenomenology. In this paper, we present time sequences of spectral fit parameters for 156 bursts selected for either their high peak flux or fluence. All bursts have at least eight spectra in excess of 45σ above background and span burst durations from 1.66 to 278s. Individual spectral accumulations are typically 128ms long at the peak of the brightest events but can be as short as 16ms, depending on the type of data selected. We have used mostly high energy resolution data from the Large Area Detectors, covering an energy range of typically 28-1800keV. The spectral model chosen is from a small empirically determined set of functions, such as the well-known "GRB" function, that best fits the time-averaged burst spectra. Thus, there are generally three spectral shape parameters available for each of the 5500 total spectra: a low-energy power-law index, a characteristic break energy, and possibly a high-energy power-law index. We present the distributions of the observed sets of these parameters and comment on their implications. File Summary: -------------------------------------------------------------------------------- FileName Lrecl Records Explanations -------------------------------------------------------------------------------- ReadMe 80 . This file table1.dat 64 156 General characteristics of catalog bursts -------------------------------------------------------------------------------- See also: IX/20 : The Fourth BATSE Burst Catalog (Paciesas+ 1999) J/ApJS/134/385 : Suppl. to the BATSE gamma-ray burst catalogs (Kommers+, 2001) J/ApJS/120/399 : ULYSSES supplement to GRB 3B catalog (Hurley+, 1999) Byte-by-byte Description of file: table1.dat -------------------------------------------------------------------------------- Bytes Format Units Label Explanations -------------------------------------------------------------------------------- 1- 10 A10 --- Burst Burst name (1) 11 A1 --- n_Burst [e] e: Overwriting event 13- 16 I4 --- TrigNo Trigger number 18- 22 A5 --- Data Data type (2) 24- 26 I3 --- Detect Detector number (3) 28- 31 A4 --- Model Model used (4) 33- 35 I3 --- NSpect Number of spectra 37- 43 F7.3 s Start Time interval chosen for fitting (Start) 45- 51 F7.3 s Stop Time interval chosen for fitting (Stop) 53- 57 F5.1 cm-2/s Speak Peak flux (in photons/cm2/s) (5) 59- 64 E6.1 10-7J/cm2 Fluence Total fluence (5) -------------------------------------------------------------------------------- Note (1): Burst names are from Meegan et al., 1996ApJS..106...65M 1996ApJS..106...65M (3B Catalog) and Paciesas et al., 1999, Cat. J/ApJS/122/465 (4B) and continue with a "5B" prefix for bursts that occurred after the end of the 4B Catalog. Note (2): Data type: HERB/SHERB: high energy resolution MER/CONT : medium energy resolution Note (3): Entries with multiple detectors indicate that summed data were used for the analysis. Note (4): Model are described in Sect. 3.3 of the text. GRB: empirical model (Sect. 3.3.1) COMP: Comptonized spectrum model (Sect. 3.3.2) BPL: broken power-law model (Sect. 3.3.3) SBPL: smoothly broken power law model (Sect. 3.3.4) Note (5): Fluences are determined for the given spectral form and are integrated over the indicated time interval; peak fluxes have varying timescales. Thus, these differ from the 3B and 4B Catalog values. -------------------------------------------------------------------------------- History: From ApJS electronic version Some corrections of the "Burst name" multiplicity letter were made on 26-Aug-2002
(End) James Marcout, Patricia Bauer [CDS] 06-Mar-2000
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