J/ApJ/924/69 Energies of X-ray plateaus and flares in GRBs (Yi+, 2022)
Statistical analyses of the energies of X-ray plateaus and flares in gamma-ray
bursts.
Yi S.-X., Du M., Liu T.
<Astrophys. J., 924, 69 (2022)>
=2022ApJ...924...69Y 2022ApJ...924...69Y
ADC_Keywords: GRB; Redshifts; X-ray sources; Energy distributions
Keywords: Gamma-ray bursts ; Black holes ; Neutron stars ; Accretion ;
Magnetars
Abstract:
Distinct X-ray plateau and flare phases have been observed in the
afterglows of gamma-ray bursts (GRBs), and most of them should be
related to central engine activities. In this paper, we collect
174 GRBs with X-ray plateau phases and 106 GRBs with X-ray flares.
There are 51 GRBs that overlap in the two selected samples. We analyze
the distributions of the proportions of the plateau energy Eplateau
and the flare energy Eflare relative to the isotropic prompt
emission energy Eγ,iso. The results indicate that they well
meet the Gaussian distributions and the medians of the logarithmic
ratios are ~-0.96 and -1.39 in the two cases. Moreover, strong
positive correlations between Eplateau (or Eflare) and
Eγ,iso with slopes of ∼0.95 (or ∼0.80) are presented. For the
overlapping sample, the slope is ∼0.80. We argue that most of X-ray
plateaus and flares might have the same physical origin but appear
with different features because of the different circumstances and
radiation mechanisms. We also test the applicabilities of two models,
i.e., black holes surrounded by fractured hyperaccretion disks and
millisecond magnetars, on the origins of X-ray plateaus and flares.
File Summary:
--------------------------------------------------------------------------------
FileName Lrecl Records Explanations
--------------------------------------------------------------------------------
ReadMe 80 . This file
table1.dat 40 174 Data of GRBs with X-ray plateaus
table2.dat 41 106 Data of GRBs with X-ray flares
--------------------------------------------------------------------------------
See also:
J/MNRAS/418/2202 : Analysis of γ-ray bursts (Dainotti+, 2011)
J/ApJ/774/157 : Swift GRBs with X-ray afterglows and z<9.5 (Dainotti+, 2013)
J/ApJ/787/66 : Burst duration measurements for a GRB sample (Zhang+, 2014)
J/ApJS/227/7 : Long & short GRBs with host galaxies data (Li+, 2016)
J/ApJS/224/20 : 10yr of Swift/XRT obs. of GRBs (Yi+, 2016)
J/ApJ/852/53 : Early X-ray flares in GRBs (Ruffini+, 2018)
J/ApJS/248/21 : Swift long gamma-ray bursts (Hao+, 2020)
J/MNRAS/492/1919 : Type I GRBs & the new classification method (Minaev+, 2020)
Byte-by-byte Description of file: table1.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 7 A7 --- GRB GRB identifier
9 A1 --- f_GRB [b] Indicates overlapping data in GRB
11- 17 F7.5 --- z [0.036/8] Spectroscopic redshift
19- 25 F7.3 10+44J E [0.004/295.2] Isotropic energy of prompt
emission; 1e+51erg
27- 32 F6.3 10+44J e_E [0.001/20.4]? Uncertainty in E
34- 40 F7.3 10+43J Eplat [0.001/806.1] Plateau phase energy; 1e+50erg
--------------------------------------------------------------------------------
Byte-by-byte Description of file: table2.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 7 A7 --- GRB GRB identifier
9 A1 --- f_GRB [b] Indicates overlapping data in GRB
11- 16 F6.4 --- z [0.25/8] Spectroscopic redshift
18- 25 F8.3 10+44J E [0.016/2171] Isotropic energy of prompt
emission; 1e+51erg
27- 33 F7.3 10+44J e_E [0.003/139]? Uncertainty in E
35- 41 F7.3 10+43J Eflare [0.026/985] Flare energy; 1e+50erg
--------------------------------------------------------------------------------
History:
From electronic version of the journal
(End) Prepared by [AAS], Emmanuelle Perret [CDS] 14-Aug-2023