J/MNRAS/492/1919 Type I GRBs and the new classification method (Minaev+, 2020)
The Ep,i-Eiso correlation: type I gamma-ray bursts and the new
classification method.
Minaev P.Y., Pozanenko A.S.
<Mon. Not. R. Astron. Soc., 492, 1919-1936 (2020)>
=2020MNRAS.492.1919M 2020MNRAS.492.1919M (SIMBAD/NED BibCode)
ADC_Keywords: GRB ; Redshifts ; Gamma rays
Keywords: methods: data analysis - methods: statistical - catalogues -
gamma-ray bursts - neutron star mergers - transients: supernovae
Abstract:
We present the most extensive sample of 45 type I (short) and 275 type
II (long) gamma-ray bursts (GRBs) with known redshift to investigate
the correlation between the rest-frame peak energy, Ep,i and the
total isotropic equivalent energy, Eiso of the prompt emission
(Amati relation). The Ep,i-Eiso correlation for type I bursts is
found to be well distinguished from the one constructed for type II
bursts and has a similar power-law index value,
Ep,i∝Eiso0.4, which possibly indicates the same emission
mechanism of both GRB types. We show that the initial pulse complex
(IPC) of type I bursts with an extended emission and regular type I
bursts follow the same correlation. We obtain similar results for type
II bursts associated with Ic supernovae and for regular type II
bursts. Three possible outliers from the Ep,i-Eiso correlation for
type II subsample are detected. Significant evolution of the
Ep,i-Eiso correlation with redshift for type II bursts is not
found. We suggest the new classification method, based on the
Ep,i-Eiso correlation and introduce two parameters,
EH=Ep,i,2Eiso,51-0.4 and EHD=Ep,i,2
Eiso,51-0.4T90,i-0.5, where Ep,i,2 is the value of Ep,i
parameter in units of 100keV, Eiso,51 is the value of Eiso
parameter in units of 1051erg, and T90,i is the rest-frame
duration in units of seconds. EHD is found to be the most reliable
parameter for the blind type I/type II classification, which can be
used to classify GRBs with no redshift.
Description:
To construct the sample of GRBs with a measured redshift (both
spectroscopic and photometric) and Ep parameters we used different
sources: GRB catalogues of Konus/Wind (Svinkin et al.
2016ApJS..224...10S 2016ApJS..224...10S, Cat. J/ApJS/224/10; Tsvetkova et al.
2017ApJ...850..161T 2017ApJ...850..161T, Cat. J/ApJ/850/161), BeppoSAX (Frontera et al.
2009ApJS..180..192F 2009ApJS..180..192F, Cat. J/ApJS/180/192), and GBM/Fermi (Narayana
Bhat et al. 2016ApJS..223...28N 2016ApJS..223...28N) experiments ; Papers concerning
Ep,i-Eiso correlation investigation (e.g. Amati
2006MNRAS.372..233A 2006MNRAS.372..233A; Qin & Chen 2013MNRAS.430..163Q 2013MNRAS.430..163Q; Zhang et al.
2018PASP..130e4202Z 2018PASP..130e4202Z; Zou et al. 2018ApJ...852L...1Z 2018ApJ...852L...1Z); Papers
concerning analysis of individual GRBs (e.g. Minaev & Pozanenko
2017AstL...43....1M 2017AstL...43....1M; Pozanenko et al. 2018ApJ...852L..30P 2018ApJ...852L..30P; Pandey et
al. 2019MNRAS.485.5294P 2019MNRAS.485.5294P); GCN circulars archive
(https://gcn.gsfc.nasa.gov/gcn3_archive.html); Online catalogue of
well-localized GRBs by J. Greiner. (http://www.mpe.mpg.de/
jcg/grbgen.html); The catalogue of GRB associated supernova (Cano et
al. 2017AdAst2017E...5C 2017AdAst2017E...5C); The paper related to the extended emission
investigation of type I GRBs (Norris et al. 2010ApJ...717..411N 2010ApJ...717..411N).
We also derive Eiso and Ep,i values for 45 GRBs using spectral
parameters and redshift, available in the literature.
The complete sample of GRBs including 45 type I and 275 type II bursts
registered up to 2019, January is presented in Table A1.
File Summary:
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FileName Lrecl Records Explanations
--------------------------------------------------------------------------------
ReadMe 80 . This file
tablea1.dat 152 320 The sample of gamma-ray bursts
refs.dat 87 130 References for Table A1
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See also:
J/ApJS/224/10 : The second Konus-Wind short GRB catalog (Svinkin+, 2016)
J/ApJ/850/161 : Konus-Wind cat. of GRBs with redshifts. I. (Tsvetkova+, 2017)
J/ApJS/180/192 : BeppoSAX/GRBM γ-ray Burst Catalog (Frontera+, 2009)
Byte-by-byte Description of file: tablea1.dat
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Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 7 A7 --- GRB GRB name (YYMMDDA)
9 A1 --- f_GRB [*] Flag on GRB (1)
11- 17 F7.2 s T90i Rest-frame duration of the burst (2)
19- 25 F7.5 --- z Redshift
27- 30 F4.2 --- E_z ? Upper error on z
32- 35 F4.2 --- e_z ? Lower error on z
37- 38 A2 --- f_z [PH ] Flag on z indicating the redshift is
photometric
40- 50 F11.6 10+44J Eiso Total isotropic equivalent energy
52- 61 F10.6 10+44J E_Eiso Upper error on Eiso
63- 72 F10.6 10+44J e_Eiso Lower error on Eiso
74- 80 F7.2 keV Epi Rest-frame peak energy
82- 89 F8.2 keV E_Epi Upper error on Epi
91- 97 F7.2 keV e_Epi Lower error on Epi
99-105 A7 --- Type Classification of the burst (3)
107-116 A10 --- Exp Experiment used for the calculation on
T90,i, Ep,i and Eiso values
118-132 A15 --- Ref References
134-138 F5.2 --- EH Energy-hardness parameter (EH) (4)
140-141 A2 --- EHtype GRB type corresponding to the EH parameter
143-149 F7.3 --- EHD Energy-Hardness-Duration parameter (EHD) (5)
151-152 A2 --- EHDtype GRB type corresponding to the EHD parameter
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Note (1): Flag as follows:
* = Eiso and Ep,i values por this source are calculated in the paper
Note (2): For the 'I+EE' GRBs the duration of the initial pulse complex (IPC) is
given
Note (3): Type as follows:
I = Regular type I GRB (34/320)
I+EE = Type I GRB with an extended emission (11/320)
II = Regular type II GRB (235/320)
II+SNph = Type II GRB with spectroscopically confirmed Ic supernova (19/320)
II+SNsp = Type II GRB with photometrically confirmed Ic supernova (21/320)
Note (4): EH=(Ep,i/100keV)/[(Eiso/1051erg)0.4]
Note (5): EHD=EH/[(T90,i/1s)0.5]
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Byte-by-byte Description of file: refs.dat
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Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 3 I3 --- Ref [1/131] Reference number
5- 23 A19 --- BibCode BibCode
25- 67 A43 --- Aut Author's name
69- 87 A19 --- Com Comments
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History:
From electronic version of the journal
(End) Ana Fiallos [CDS] 16-Mar-2023