Timescale Analysis of Spectral Lags

On the Spectral Lags of the Short Gamma-Ray Bursts⋆

We present a detail analysis on the spectral lags of the short gamma-ray bursts (GRBs) and compare them with that of the long GRBs by using the CGRO/BATSE GRB Catalog. Our sample includes 308 short GRBs and 1008 long GRBs. The light curves of these GRBs are in 64 ms time bin and they have at least one long and intense pulse, which satisfies δT ≥ 0.512 seconds at c = 1σ and cmax ≥ 6σ, where δT i...

Spectral lags caused by the Doppler effect of fireballs

Spectral Lags of Gamma-Ray Bursts From Ginga and BATSE.

The analysis of spectral lag between energy bands, which combines temporal and spectral analyses, can add strict constraints to gamma-ray burst (GRB) models. In previous studies, the lag analysis focused on the lags between channel 1 (25-57 keV) and channel 3 (115-320 keV) from the Burst and Transient Source Experiment (BATSE). In this Letter, we analyzed the cross-correlation average lags (inc...

Spectral lags caused by the curvature effect of fireballs

Understanding Spectral Variability and Time Lags in Accreting Black Holes

I review the temporal/spectral data of accreting black hole sources paying most attention to the properties of the temporal variability such as photon energy dependent autoand cross-correlation functions, average shot profiles and hardness ratios, and the Fourier frequency dependent time/phase lags. These statistics characterize spectral changes at short time scales that are otherwise impossibl...