J/PAZh/35/10 Gamma-ray bursts with known redshifts (Badjin+, 2009)
Investigation of gamma-ray bursts with known redshifts:
Statistical analysis of parameters.
Badjin D.A., Beskin G.M., Greco G.
<Pis'ma Astron. Zh. 35, 10 (2009)>
=2009PAZh...35...10B 2009PAZh...35...10B
=2009AstL...35....7B 2009AstL...35....7B
ADC_Keywords: Gamma rays
Keywords: gamma-ray bursts - afterglows
Abstract:
Observational parameters of the optical and gamma-ray emissions from
58 gamma-ray bursts (GRBs) with discovered afterglows and known
redshifts are analyzed. The distributions of these parameters and pair
correlations between them are studied. Approximately half of the
objects exhibit a relatively slow decrease in the optical flux at
initial afterglow phases (with a power-law index in the decay law
α<1). Correlations have been found between the luminosities,
energies, and durations of the optical and gamma-ray emissions, which
can be explained by the presence of universal features in the light
curves. A correlation of the peak luminosity for afterglows with the
redshift and an anticorrelation of their durations with the redshift
have been found for the first time. Against the background of a weak z
dependence of the total afterglow energy, this effect can be explained
by cosmological evolution of the GRB environment, which determines the
rate of optical energy release.
File Summary:
--------------------------------------------------------------------------------
FileName Lrecl Records Explanations
--------------------------------------------------------------------------------
ReadMe 80 . This file
table1.dat 92 58 Parameters of the "observed" sample
table2.dat 87 58 Parameter of the "intrinsic" sample
--------------------------------------------------------------------------------
See also:
IX/20 : The Fourth BATSE Burst Revised Catalog (Paciesas+ 1999)
IX/36 : GRANAT/PHEBUS catalog of cosmic GRB (Terekhov+, 1994-2002)
J/A+AS/129/1 : GRANAT/WATCH catalogue of gamma-ray bursts (Sazonov+ 1998)
J/ApJS/126/19 : BATSE gamma-ray burst spectral catalog. I. (Preece+, 2000)
J/ApJS/134/385 : Supplement to the BATSE GRB catalogs (Kommers+, 2001)
J/ApJ/616/1072 : The GUSBAD catalog of gamma-ray bursts (Schmidt+, 2004)
J/A+A/438/1175 : First INTEGRAL SPI-ACS Gamma-Ray Burst Catalogue (Rau+, 2005)
Byte-by-byte Description of file: table1.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 7 A7 --- GRB GRB name
8- 11 I4 --- Npt Number of points
13- 18 F6.4 --- z Redshift
20- 25 F6.2 [mW/m2] logFopt Peak optical flux from R band
27- 30 F4.2 [mW/m2] e_logFopt rms uncertainty on logFopt
32- 37 F6.2 [mJ/m2] logSopt Optical fluence [erg/cm2]
39- 42 F4.2 [mJ/m2] e_logSopt rms uncertainty on logSopt
44- 48 F5.2 [d] logt90opt Afterglow duration in the proper
frame T90opt
50- 55 F6.3 [d] logtpk Afterglow duration in the proper frame Tpk
57- 61 F5.2 [mW/m2] logFg ?=- Peak gamma-ray flux
63- 66 F4.2 [mW/m2] e_logFg ? rms uncertainty on logFg
68- 72 F5.2 [mJ/m2] logSg ?=- Gamma-ray fluence [erg/cm2]
74- 77 F4.2 [mJ/m2] e_logSg ? rms uncertainty on logSg
79- 82 F4.2 [s] logtg ? Afterglow duration in the proper frame Tg
84- 87 F4.2 --- alpha1 Power-law index of the flux decay
with time (F∝t^-α)
89- 92 F4.2 --- e_alpha1 rms uncertainty on alpha
--------------------------------------------------------------------------------
Byte-by-byte Description of file: table2.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 7 A7 --- GRB GRB name
9- 14 F6.4 --- z Redshift
16- 20 F5.2 [10-7W] logLopt Isotropic equivalent of the peak optical
luminosity
22- 25 F4.2 [10-7W] e_logLopt rms uncertainty on logLopt
27- 31 F5.2 [10-7J] logEopt Isotropic equivalent of the total optical
energy
33- 36 F4.2 [10-7J] e_logEopt rms uncertainty on logEopt
38- 42 F5.2 [d] logT90opt Afterglow duration ( =t90opt/(1+z))
44- 49 F6.3 [d] logTpk Afterglow duration ( =tpk/(1+z))
51- 55 F5.2 [10-7W] logLiso ?=- Isotropic equivalent of the peak
gamma-ray luminosity in the energy
range 15-150keV
57- 60 F4.2 [10-7W] e_logLiso ? rms uncertainty on logLiso
62- 66 F5.2 [10-7J] logEiso ?=- Isotropic equivalent of the total
gamma-ray energy (the energy range
15-150keV in the proper burst frame)
68- 71 F4.2 [10-7J] e_logEiso ? rms uncertainty on logEiso
73- 77 F5.2 [s] logTg ? Afterglow duration ( =tg/(1+z))
79- 82 F4.2 --- alpha2 Power-law index of the flux decay
with time (F∝t^-α)
84- 87 F4.2 --- e_alpha2 rms uncertainty on alpha
--------------------------------------------------------------------------------
History:
From electronic version of the journal
(End) Patricia Vannier [CDS] 12-Jan-2009