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Redshift Dependent Lag-Luminosity Relation in 565 BASTE Gamma Ray Bursts
- Source :
- AIP Conf.Proc.1000:28-31,2008
- Publication Year :
- 2007
-
Abstract
- We compared redshifts $z_Y$ from Yonetoku relation and $z_{lag}$ from the lag-luminosity relation for 565 BASTE GRBs and were surprised to find that the correlation is very low. Assuming that the luminosity is a function of both $z_Y$ and the intrinsic spectral lag $\tau_{lag}$, we found a new redshift dependent lag-luminosity relation as $L=7.5\times 10^{50}{\rm erg/s}(1+z)^{2.53}\tau_{lag}^{-0.282}$ with the correlation coefficient of 0.77 and the chance probability of $7.9\times 10^{-75}$. To check the validity of this method, we examined the other luminosity indicator, Amati relation, using $z_Y$ and the observed fluence and found the correlation coefficient of 0.92 and the chance probability of $5.2\times 10^{-106}$. Although the spectral lag is computed from two channels of BATSE, our new lag-luminosity relation suggests that a possible lag-luminosity relation in the \swift era should also depend on redshift.
- Subjects :
- Astrophysics
Subjects
Details
- Database :
- arXiv
- Journal :
- AIP Conf.Proc.1000:28-31,2008
- Publication Type :
- Report
- Accession number :
- edsarx.0710.5864
- Document Type :
- Working Paper
- Full Text :
- https://doi.org/10.1063/1.2943466