The Spectral Lag Distribution of Swift Gamma-Ray Bursts

Journal Article · Mon May 25 04:00:00 EDT 2009 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.3155932· OSTI ID:21308678

Foley, S; McBreen, B; Hanlon, L ^[1]; McBreen, S ^[1]; McGlynn, S ^[2]

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1. UCD School of Physics, UCD, Belfield, Dublin 4 (Ireland)
2. Department of Physics, Royal Institute of Technology (KTH), SE-10691 Stockholm (Sweden)

Swift has detected 350 GRBs from its launch in November 2004 up to August 2008. Approximately one third of these bursts have a measured redshift. We present the spectral lag distributions of long and short-duration Swift GRBs. The spectral lags are determined using a cross-correlation analysis between lightcurves in the 15-25 and 50-100 keV BAT energy channels. The proposed relationship between spectral lag and isotropic peak luminosity is investigated for the GRBs with known redshift. The sensitivity of BAT does not allow the lags of very faint bursts to be measured and so a correlation between faint, long-lag Swift GRBs and the supergalactic plane cannot be confirmed using this sample.

• OSTI ID: 21308678
• Journal Information: AIP Conference Proceedings, Journal Name: AIP Conference Proceedings Journal Issue: 1 Vol. 1133; ISSN APCPCS; ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
79 ASTRONOMY AND ASTROPHYSICS
CORRELATIONS
COSMIC GAMMA BURSTS
COSMIC GAMMA SOURCES
COSMIC PHOTONS
DISTRIBUTION
GAMMA DETECTION
GAMMA RADIATION
KEV RANGE
LUMINOSITY
PHOTOMETRY
RED SHIFT
SENSITIVITY
TELESCOPE COUNTERS