A New Correlation Between GRB X-Ray Flares And The Prompt Emission

Abstract

From a sample of GRBs detected by the $Fermi$ and $Swift$ missions, we have extracted the minimum variability time scales for temporal structures in the light curves associated with the prompt emission and X-ray flares. A comparison of this variability time scale with pulse parameters such as rise times,determined via pulse-fitting procedures, and spectral lags, extracted via the cross-correlation function (CCF), indicate a tight correlation between these temporal features for both the X-ray flares and the prompt emission. These correlations suggests a common origin for the production of X-ray flares and the prompt emission in GRBs.

5 pages, 3 figures, Accepted for publication in ApJL

References in corpus (6)

• The Internal-Collision-Induced Magnetic Reconnection and Turbulence (ICMART) Model of Gamma-Ray Bursts
• The First Survey of X-ray Flares from Gamma Ray Bursts Observed by Swift: Temporal Properties and Morphology
• A new model for infrared and submillimetre counts
• Pulse Width Evolution of Late Time X-rays Flares in GRBs: Evidence For Internal Shocks
• The Minimum Variability Time Scale and its Relation to Pulse Profiles of Fermi GRBs
• Luminosity correlations for gamma-ray bursts and implications for their prompt and afterglow emission mechanisms

Cited by in corpus (5)

• Magnetar formation through a convective dynamo in protoneutron stars
• A comprehensive analysis of Fermi Gamma-Ray Burst Data: IV. Spectral lag and Its Relation to Ep Evolution
• Gamma-Ray Bursts: Temporal Scales and the Bulk Lorentz Factor
• Flares in gamma-ray burst X-ray afterglows as prompt emission from slightly misaligned structured jets
• The Hurst Exponent of Fermi GRBs