J/PASP/124/297 GRB spectral lags (Li+, 2012)
Spectral lags obtained by CCF of smoothed light curves.
Li Z., Chen L., Wang D.
<Publ. Astron. Soc. Pac., 124, 297-303 (2012)>
=2012PASP..124..297L 2012PASP..124..297L
ADC_Keywords: Gamma rays
Keywords: gamma-ray bursts - data analysis and techniques
Abstract:
We present a new technique to calculate the spectral lags of γ-ray
bursts (GRBs). Unlike previous processing methods, we first smooth the
light curves of γ-ray bursts in high- and low-energy bands using
the "Loess" filter, then we directly define the spectral lags as
such to maximize the cross-correlation function (CCF) between two
smoothed light curves.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 62 75 Spectral lags of GRBs with measured redshift
table2.dat 62 97 Spectral lags of GRBs with unknown redshift
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See also:
J/ApJS/169/62 : GRB database of spectral lags (Hakkila+, 2007)
Byte-by-byte Description of file:table[12].dat
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Bytes Format Units Label Explanations
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1- 7 A7 --- GRB γ-ray burst trigger name (YYMMDDA)
10 I1 --- Peak [1/4]? Peak number of GRBs
12- 19 F8.4 s Start Start time of individual pulse relative to
the GRB trigger time
21- 28 F8.4 s Stop Stop time of individual pulse relative to the
GRB trigger time
30- 35 F6.3 s lagG Spectral lag between 15-25keV and 50-100keV by
fitting with Gaussian plus linear equation
37- 40 F4.2 s e_lagG rms uncertainty on lagG
42- 46 F5.2 s lagG0.1 Spectral lag calculated by smoothing method
with α=0.1 (1)
48- 51 F4.2 s e_lagG0.1 rms uncertainty on lagG0.1
53- 57 F5.2 s lagG0.05 Spectral lag calculated by smoothing method
with α=0.05 (1)
59- 62 F4.2 s e_lagG0.05 rms uncertainty on lagG0.05
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Note (1): the smoothing factor α of the moving oess filter is between
0 (no smotthing) and 1 (flat curve).
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History:
From electronic version of the journal
(End) Patricia Vannier [CDS] 11-Feb-2013