Spectral evolution of gamma-ray bursts detected by the SIGNE experiment. 1: Correlation between intensity and spectral hardness

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view Abstract Citations (55) References (20) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS Spectral Evolution of Gamma-Ray Bursts Detected by the SIGNE Experiment. I. Correlation between Intensity and Spectral Hardness Kargatis, Vincent E. ; Liang, Edison P. ; Hurley, Kevin C. ; Barat, C. ; Eveno, E. ; Niel, M. Abstract We study the continuum spectral evolution of 16 gamma-ray bursts detected by the Franco-Soviet SIGNE experiment in 1981-1982 by fitting time resolved (0.5 s) spectra in count space with simple thermal bremsstrahlung and synchrotron models. We find that there is no single characteristic of spectral evolution: we see hard-to-soft, soft-to-hard, luminosity-hardness tracking, and chaotic evolution. We perform correlation studies between instantaneous burst intensity and spectral temperature for seven bursts. While we basically confirm the existence of a correlation between these variables as originally claimed by Golenetskii et al. (1983) we find higher values and a broader range of correlation indices. Publication: The Astrophysical Journal Pub Date: February 1994 DOI: 10.1086/173724 Bibcode: 1994ApJ...422..260K Keywords: Emission Spectra; Evolution (Development); Gamma Ray Astronomy; Gamma Ray Bursts; Luminosity; Bremsstrahlung; Spectrum Analysis; Synchrotron Radiation; Astrophysics; GAMMA RAYS: BURSTS; GAMMA RAYS: OBSERVATIONS full text sources ADS | data products SIMBAD (16)