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:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 64 156 General characteristics of catalog bursts
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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
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Bytes Format Units Label Explanations
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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)
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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.
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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