The correlations among variability,optical peak time and spectral time lag of long gamma-ray bursts

作者：廖斌,邹远川,王扉扉,刘屿,雷卫华

摘要：Statistical relations are useful tools to comprehend the intrinsic physics processes of gamma-ray bursts(GRBs).In this work we collect spectral lag(),variability(V)and optical peak time(tp,o).We find that there is a correlation between variabilities and spectral lags,reading as V=−0.0075(±0.0007)×log10+0.0351(±0.0024).Theremay also exist a relativelyweak positive tendency between GRBs optical band peak times and their spectral time lags.Its Pearson coefficient is 0.398,which indicates a weak linear correlation.If we contain some“negative spectral lag”samples,then the latter relation would be worse due to two outlying points.The−V relation is consistent with previous studies,and the positive trend betweenand tp,o indicates the spectral lag of GRB might be caused by the curvature effect,but this conclusion is not significant.

发文机构：School of Physics School of Mathematics and Physics

关键词：gamma-rayburstgeneralmethodsSTATISTICAL

分类号： O57[理学—粒子物理与原子核物理]