Investigating the Lag-Luminosity Relation in the Swift Era with the Burst Alert Telescope (BAT)

Journal Article · Thu May 22 04:00:00 EDT 2008 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.2943428· OSTI ID:21137182

Stamatikos, Michael; Barthelmy, Scott D; Gehrels, Neil ^[1]; Ukwatta, Tilan N ^[2]; Sakamoto, Takanori ^[1]; Norris, Jay P ^[3]; Dhuga, Kalvir S ^[2]

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1. NASA Goddard Space Flight Center, Code 661, Greenbelt, MD 20771 (United States)
2. George Washington University, Washington, DC 20052 (United States)
3. Space Science Division, NASA/Ames Research Center, Moffett Field, CA 94035-1000 (United States)

We report on an investigation that confronts the lag-luminosity relation (LLR), i.e. a surrogate redshift parameterization based upon an empirically determined anti-correlation between the observed isotropic luminosity and the temporal lag between the arrivals of photon pulses in low (25-50 keV) and high (100-300 keV) energy bands, with observations of gamma-ray bursts (GRBs) with Swift's Burst Alert Telescope (BAT). Our initial methodology is based upon a cross-correlation function (CCF) analysis of 64 ms BAT light curves (temporal spectra), for a small subset of GRBs with observed spectroscopic redshift (z{sub obs}). Our preliminary results span 4 temporal decades and indicate an agreement with LLR, within the margins of error (excluding GRBs 980425 and 060218)

• OSTI ID: 21137182
• Journal Information: AIP Conference Proceedings, Journal Name: AIP Conference Proceedings Journal Issue: 1 Vol. 1000; ISSN 0094-243X; ISSN APCPCS
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
CORRELATION FUNCTIONS
CORRELATIONS
COSMIC GAMMA BURSTS
COSMIC GAMMA SOURCES
COSMIC PHOTONS
GAMMA ASTRONOMY
GAMMA SPECTRA
KEV RANGE
LUMINOSITY
PULSES
RED SHIFT
TELESCOPE COUNTERS