Redshift-dependent lag-luminosity relation in 565 BATSE gamma-ray bursts

Details Redshift-dependent lag-luminosity relation in 565 BATSE gamma-ray bursts Redshift-dependent lag-luminosity relation in 565 BATSE gamma-ray bursts

May 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008mnras.386l..33t&link_type=abstract

Monthly Notices of the Royal Astronomical Society: Letters, Volume 386, Issue 1, pp. L33-L37.

Astronomy and Astrophysics

Astronomy

14

Gamma-Rays: Bursts, Gamma-Rays: Observation

Scientific paper

We compared redshifts zY measured from the Yonetoku relation and zlag from the lag-luminosity relation for 565 BATSE gamma-ray bursts (GRBs) and were surprised to find that the correlation between these two redshifts is very low. Assuming that the luminosity is a function of both zY and the intrinsic spectral lag τlag, we found a new redshift-dependent lag-luminosity relation L = 7.5 × 1050ergs-1 (1 + z)2.53τ-0.282lag with the correlation coefficient of 0.77 and the chance probability of 7.9 × 10-75. Although the spectral lag is computed from two channels of the Burst and Transient Source Experiment (BATSE), our new lag-luminosity relation suggests that a future lag-luminosity relation defined in the Swift data should also depend on the redshift.

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