The Synchrotron Shock Model Confronts a “Line of Death” in the BATSE Gamma-Ray Burst Data
- 10 October 1998
- journal article
- research article
- Published by American Astronomical Society in The Astrophysical Journal
- Vol. 506 (1) , L23-L26
- https://doi.org/10.1086/311644
Abstract
The synchrotron shock model (SSM) for gamma-ray burst emission makes a testable prediction: that the observed low-energy power-law photon number spectral index cannot exceed -2/3 (where the photon model is defined with a positive index: dN/dE∝Eα). We have collected time-resolved spectral fit parameters for over 100 bright bursts observed by the Burst And Transient Source Experiment on board the Compton Gamma Ray Observatory. Using this database, we find 23 bursts in which the spectral index limit of the SSM is violated. We discuss elements of the analysis methodology that affect the robustness of this result, as well as some of the escape hatches left for the SSM by theory.Keywords
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This publication has 22 references indexed in Scilit:
- Possible Evidence for Relativistic Shocks in Gamma‐Ray BurstsThe Astrophysical Journal, 1997
- Evolution of the Low-Energy Photon Spectra in Gamma-Ray BurstsThe Astrophysical Journal, 1997
- Physical Model of Gamma-Ray Burst Spectral EvolutionThe Astrophysical Journal, 1997
- The Third BATSE Gamma-Ray Burst CatalogThe Astrophysical Journal Supplement Series, 1996
- Low-frequency spectra of gamma-ray burstsThe Astrophysical Journal, 1994
- Producing the universal spectrum of cosmological gamma-ray bursts with the Klein-Nishina cross sectionThe Astrophysical Journal, 1994
- Two populations and models of gamma-ray burstsThe Astrophysical Journal, 1994
- BATSE observations of gamma-ray burst spectra. I - Spectral diversityThe Astrophysical Journal, 1993
- Batse spectroscopy detector calibrationExperimental Astronomy, 1992
- Are gamma-ray bursts optically thick?The Astrophysical Journal, 1986