The History of GRB Outflows: Ejection Lorentz Factor and Radiation Location of X-Ray Flares

Hui-Jun Mu, Da-Bin Lin, Shao-Qiang Xi +6

We present time-resolved spectral analysis of the steep decay segments of 29 bright X-ray flares of gamma-ray bursts (GRBs) observed with the Swift/X-ray telescope, and model their…