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Gamma-ray Burst Flares: X-ray Flaring. II | | C. A. Swenson
; P. W. A. Roming
; | | Date: |
9 Oct 2013 | | Abstract: | We present a catalog of 497 flaring periods found in gamma-ray burst (GRB)
light curves taken from the online XRT GRB Catalogue. We analyzed 680
individual light curves using a flare detection method developed and used on
our UV/optical GRB Flare Catalog. The method makes use of the Bayesian
Information Criterion to analyze the residuals of fitted GRB light curves and
statistically determines the optimal fit to the light curve residuals in
attempt to identify any additional features. These features, which we classify
as flares, are identified by iteratively adding additional ’breaks’ to the
light curve. We find evidence of flaring in 310 of the analyzed light curves.
For those light curves with flares, we find an average number of ~1.5 flares
per GRB. As with the UV/optical, flaring in our sample is generally confined to
the first 1000 s of the afterglow, but can be detected to beyond 10^5 s. Only
~50% of the detected flares follow the ’classical’ definition of Delta t/t <<
1, with many of the largest flares exhibiting Delta t/t ~ 1 and some exceeding
this value. | | Source: | arXiv, 1310.2628 | | Services: | Forum | Review | PDF | Favorites | |
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