Mathematics – Logic
Scientific paper
May 2008
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008aipc.1000..109h&link_type=abstract
GAMMA-RAY BURSTS 2007: Proceedings of the Santa Fe Conference. AIP Conference Proceedings, Volume 1000, pp. 109-112 (2008).
Mathematics
Logic
3
Gamma-Ray Sources, Gamma-Ray Bursts, Luminosity And Mass Functions, Interpolation, Curve Fitting
Scientific paper
Gamma-ray burst (GRB) spectral lags are pulse rather than burst characteristics. Most GRB pulses have well-defined properties: short-lag pulses have shorter durations and are brighter than long-lag pulses. These properties are present in the observer's frame, implying that pulse characteristics are intrinsic and are more pronounced than cosmological effects. We show how the GRB lag measured by the cross-correlation function is primarily that of the brightest, shortest-lag pulse, and is insensitive to the presence of longer-lag pulses. The hypothesis that long-lag pulses are related to external shocks is thus placed in doubt because (1) short-lag pulses often precede long-lag ones temporally, and (2) the range of pulse lags seems to span the range of GRB lags.
Bonnell Jerry T.
Fragile Chris P.
Giblin Timothy W.
Hakkila Jon
Norris Jay P.
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