Double-Peaked Gamma-Ray Bursts: Conjoined Twins or Accidental Neighbors?
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Taylor, Corinne Maly
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Abstract
A gamma-ray burst (GRB) emits its prompt emission in the form of pulses. These pulses are characterized by hard-to-soft monotonic emission overlaid by a triple-peaked, time-varying component that causes the GRB pulse light curve to appear “bumpy” rather than smooth. If a single pulse can have multiple peaks, then there is difficulty in unambiguously identifying the number of pulses found in complex emission episodes containing multiple prominent peaks. Double-peaked GRB pulses contain two distinct peaks; using data collected by the Burst And Transient Source Experiment (BATSE), we explore the hypothesis that some or all of these double-peaked pulses might simply be isolated pulses having pronounced residual components.
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gamma-rays, astrophysics, statistics, double pulses, models, fitting