Systematic Spectral Lag Analysis of Swift Known- GRBs
The lag between 50–100 keV and 15–25 keV versus isotropic peak luminosity with X-ray break time versus X-ray luminosity. The blue points are lag-luminosity results. The data reported in Dainotti et al. 2013 are shown in red. The blue lines are best fit values of power-law fitting. The black dotted lines show the region corresponding to variance . The correlation coefficient is −0.96 with sample size of 32.