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Paper   IPM / Astronomy / 15617
School of Astronomy
  Title:   Revisiting the Statistics of X-ray Flares in Gamma-ray Bursts
1.  Y. Wang
2.  Y. Aimuratov
3.  R. Moradi
4.  M. Peresano
5.  R. Ruffini
6.  S. Shakeri
  Status:   Published
  Journal: THESEUS Workshop 2017
  Year:  2018
  Supported by:            ipm IPM
The statistics of X-ray flares in the afterglow of gamma-ray bursts (GRBs) have been studied extensively without considering the possible different origins of each flare. By satisfying six observational criteria, we find a sample composed of 16 long GRBs observed by Swift satellite may share a same origin. By applying the Markov chain Monte Carlo iteration and the machine learning algorithms (locally weighted regression and Gaussian process regression), impressively, the flares in these GRBs show strong correlations with the energy released in the prompt emission. These correlations were never discovered in previous papers, and they could not be well explained by previous models. These correlations imply that the prompt emission and the X-ray flare are not independent, they may be originated following a same sequence. The new THESUS satellite will provide us a larger sample and more detailed spectra to refine the results we obtained in this article

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