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J/ApJS/126/19       BATSE gamma-ray burst spectral catalog. I. (Preece+, 2000)
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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
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ADC_Keywords: Gamma rays
Keywords: catalogs - gamma rays: bursts
Mission_Name: BATSE

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
    45{sigma} 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/cm^2^/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 (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
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(End)                         James Marcout, Patricia Bauer [CDS]    06-Mar-2000