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Astrophysics and Space Science

, Volume 231, Issue 1–2, pp 207–210 | Cite as

GRBs in the 5-10 keV regime as seen by BATSE

  • R. D. Preece
  • M. S. Briggs
  • G. N. Pendleton
  • W. S. Paciesas
  • J. L. Matteson
  • D. L. Band
  • L. A. Ford
Session D GRB Spectra

Abstract

The BATSE Spectroscopy Detectors (SDs) each have a thin beryllium window which allows detection of photons down to 5 keV. Until recently, exploitation of low-energy SD discriminator data has been held up by a lack of knowledge of its energy coverage. A recent series of in-flight changes in the instrument configuration has allowed the SD discriminators to be calibrated fairly accurately. With this in hand, we have surveyed BATSE GRBs for such features as X-ray precursors and after-glows in the roughly 5-10 keV band. For a large percentage of the BATSE bursts, no emission is observed in this energy band. In some cases where low-energy emission has been observed, ratios of flux histories indicate differential spectral evolution. In addition, we have obtained joint spectral fits between the low-energy data and the regular SD data, showing that a single spectral model is sometimes insufficient to fit the entire energy range.

Key words

Gamma rays: bursts Methods: data analysis 

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References

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    Yoshida, A., and Murakami, T.: 1993, ‘A Spectral Study of an “X-Ray Rich” Gamma-Ray Burst’ in Fishman, Brainerd and Hurley, ed(s).,Gamma-Ray Bursts, Second Huntsville Workshop Proceedings, AIP: New York, 333.Google Scholar
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Copyright information

© Kluwer Academic Publishers 1995

Authors and Affiliations

  • R. D. Preece
    • 1
  • M. S. Briggs
    • 1
  • G. N. Pendleton
    • 1
  • W. S. Paciesas
    • 1
  • J. L. Matteson
    • 2
  • D. L. Band
    • 2
  • L. A. Ford
    • 2
  1. 1.Dept. of PhysicsUniversity of Alabama in HuntsvilleUSA
  2. 2.Center for Astrophysics and Space SciencesUniversity of California at San DiegoLa JollaUSA

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