【摘 要】
：
Using 64 ms count data of long gamma-ray bursts (T90＞2.6s), we analyze the quantity named relative spectral lag (RSL), τ31/FWHM(1). We investigated in detail al
【机 构】
：
National Astronomical Observatories/Yunnan Observatory,Graduate School of Chinese Academy of Science
论文部分内容阅读
Using 64 ms count data of long gamma-ray bursts (T90＞2.6s), we analyze the quantity named relative spectral lag (RSL), τ31/FWHM(1). We investigated in detail all the correlations between the RSL and other parameters for a sample of nine long bursts, using the general cross-correlation technique that includes the lag between two different energy bands.We conclude that the distribution of RSLs is normal and has a mean value of 0.1; that the RSLs are weakly correlated with the FWHM, the asymmetry, peak flux (Fp), peak energy (Ep) and spectral indexes (αandβ), while they are uncorrelated with τ31, the hardnessratio (HR31) and the peak time (tm). Our important discovery is that redshift (z) and peak luminosity (Lp) are strongly correlated with the RSL, which can be measured easily and directly, making the RSL a good redshift and peak luminosity indicator.
其他文献
The article first studies the fully coupled Forward-Backward Stochastic Differential Equations (FBSDEs) with the continuous local martingale. The article is mai
建立一套基于超高真空俄歇电子能谱的原位加热系统,对GaN薄膜进行热效应研究.随着温度的增加,Ga LMM和GaMVV的动能减小.利用第一性原理计算,获得理论的GaMVV俄歇谱.加热过程
We propose a cryptographic scheme based on spatiotemporal chaos of coupled map lattices (CML) ,which is based on one-time pad. The structure of the cryptosystem
A (2+1)-dimensional Kd V equation is obtained by use of Hirota method, which possesses N-soliton solution,specially its exact two-soliton solution is presented.
介绍了一种基质辅助激光解吸电离的进样方法-气溶胶进样方法.包含基质和分析物的气溶胶粒子在大气压力下直接进入气溶胶飞行时间质谱仪,粒子产生的散射光信号由光电倍增管收
Several organic acids accumulated in Kochia Scoparia shoots and roots were studied by means of reverse-phase high performance liquid chromatography with a C18 c
PVC disulfide (2SPVC) was synthesized by solution crosslink and its molecular structure was confirmed by the particle size of d0.5 = 11.3 μm. With SEM (Scannin
A novel nickel(II) complex Ni(C6H7N)2(SCN)2(H2O)2 (C14H18N4NiO2S2, Mr = 397.15) has been synthesized and structurally characterized by X-ray analysis. The cryst
Carbosilane dendrimers with p-bromophenyl core were synthesized by alternating Grignard and hydrosilylation reaction. And the α-naphthalenyl was connected to t
Two 17-mer dsDNA with different sequence characteristics were designed to investigate the binding characteristics of berberine, an anticancer drug with uncertai