SWIFT伽玛暴的谱延迟距离指示器

A Distance Indicator of Swift Gamma Ray Bursts

早期研究发现,BASTE长暴的相对谱延迟RSL是一个有用的宇宙距离指示器。本文从SWIFT卫星数据中,挑选10个单脉冲长伽玛暴(T90>2.6)作为样本,对样本进行降噪和去除背景,用交叉相关函数分析1,3能道的谱延迟,通过拟合研究各脉冲参数Asymmetry,Fm,Fp,tm,FWHM,τ31和相对谱延迟的关系,发现相对谱延迟和红移具有很好的相关性,这充分表明SWIFT长暴的相对谱延迟仍然是一个很好的红移指示器。

Relative spectral lag （RSL） and redshift have a good correlation for the single long gamma-ray bursts of baste data（ Zhang et al. 2006）. This paper chooses 10 single long r-ray bursts（ T90 〉 2.6 s）of the swift satel- lite data as a sample, denosing and subtracting background for the sample, analyzing the date of 1,3 energy bands using cross-correlation technique , making picture to analysis the correlation between the trel,31 and lightcurve parameters （ Asymmetry, Fm, tm, FWHM, Fp, Ep, t31 ）. our discovery is that redshift （Z） are strongly correlated with the RSL, which proves RSL can be a very good red shift indicator.