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Title: Statistical Distributions of Optical Flares from Gamma-Ray Bursts

Abstract

We statistically study gamma-ray burst (GRB) optical flares from the Swift /UVOT catalog. We compile 119 optical flares, including 77 flares with redshift measurements. Some tight correlations among the timescales of optical flares are found. For example, the rise time is correlated with the decay time, and the duration time is correlated with the peak time of optical flares. These two tight correlations indicate that longer rise times are associated with longer decay times of optical flares and also suggest that broader optical flares peak at later times, which are consistent with the corresponding correlations of X-ray flares. We also study the frequency distributions of optical flare parameters, including the duration time, rise time, decay time, peak time, and waiting time. Similar power-law distributions for optical and X-ray flares are found. Our statistic results imply that GRB optical flares and X-ray flares may share the similar physical origin, and both of them are possibly related to central engine activities.

Authors:
 [1]; ; ;  [2]
  1. College of Physics and Engineering, Qufu Normal University, Qufu 273165 (China)
  2. School of Astronomy and Space Science, Nanjing University, Nanjing 210093 (China)
Publication Date:
OSTI Identifier:
22663349
Resource Type:
Journal Article
Resource Relation:
Journal Name: Astrophysical Journal; Journal Volume: 844; Journal Issue: 1; Other Information: Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
79 ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; CATALOGS; CORRELATIONS; COSMIC GAMMA BURSTS; DECAY; DISTRIBUTION; GAMMA RADIATION; RED SHIFT; STATISTICS; STELLAR FLARES; X RADIATION

Citation Formats

Yi, Shuang-Xi, Yu, Hai, Wang, F. Y., and Dai, Zi-Gao, E-mail: fayinwang@nju.edu.cn. Statistical Distributions of Optical Flares from Gamma-Ray Bursts. United States: N. p., 2017. Web. doi:10.3847/1538-4357/AA7B7B.
Yi, Shuang-Xi, Yu, Hai, Wang, F. Y., & Dai, Zi-Gao, E-mail: fayinwang@nju.edu.cn. Statistical Distributions of Optical Flares from Gamma-Ray Bursts. United States. doi:10.3847/1538-4357/AA7B7B.
Yi, Shuang-Xi, Yu, Hai, Wang, F. Y., and Dai, Zi-Gao, E-mail: fayinwang@nju.edu.cn. Thu . "Statistical Distributions of Optical Flares from Gamma-Ray Bursts". United States. doi:10.3847/1538-4357/AA7B7B.
@article{osti_22663349,
title = {Statistical Distributions of Optical Flares from Gamma-Ray Bursts},
author = {Yi, Shuang-Xi and Yu, Hai and Wang, F. Y. and Dai, Zi-Gao, E-mail: fayinwang@nju.edu.cn},
abstractNote = {We statistically study gamma-ray burst (GRB) optical flares from the Swift /UVOT catalog. We compile 119 optical flares, including 77 flares with redshift measurements. Some tight correlations among the timescales of optical flares are found. For example, the rise time is correlated with the decay time, and the duration time is correlated with the peak time of optical flares. These two tight correlations indicate that longer rise times are associated with longer decay times of optical flares and also suggest that broader optical flares peak at later times, which are consistent with the corresponding correlations of X-ray flares. We also study the frequency distributions of optical flare parameters, including the duration time, rise time, decay time, peak time, and waiting time. Similar power-law distributions for optical and X-ray flares are found. Our statistic results imply that GRB optical flares and X-ray flares may share the similar physical origin, and both of them are possibly related to central engine activities.},
doi = {10.3847/1538-4357/AA7B7B},
journal = {Astrophysical Journal},
number = 1,
volume = 844,
place = {United States},
year = {Thu Jul 20 00:00:00 EDT 2017},
month = {Thu Jul 20 00:00:00 EDT 2017}
}