X - Ray Flares and Their Connection With Prompt Emission in GRBs

TL;DR

This paper investigates the connection between X-ray flares and prompt emission in GRBs by analyzing light curve variability and spectral lags, revealing correlations that suggest a common origin.

Contribution

It introduces a wavelet-based method to analyze GRB light curves, uncovering correlations between X-ray flares and prompt emission features.

Findings

Tight correlations between temporal features of X-ray flares and prompt emission.

Evidence for a common origin of X-ray flares and prompt emission.

Insights into variability time scales and spectral lags in GRBs.

Abstract

We use a wavelet technique to investigate the time variations in the light curves from a sample of GRBs detected by Fermi and Swift. We focus primarily on the behavior of the flaring region of Swift-XRT light curves in order to explore connections between variability time scales and pulse parameters (such as rise and decay times, widths, strengths, and separation distributions) and spectral lags. Tight correlations between some of these temporal features suggest a common origin for the production of X-ray flares and the prompt emission.