J/ApJ/925/15 Radio afterglow emission of GRBs (Levine+, 2022)
Examining two-dimensional luminosity-time correlations for gamma-ray burst radio
afterglows with VLA and ALMA.
Levine D., Dainotti M., Zvonarek K.J., Fraija N., Warren D.C., Chandra P.,
Lloyd-Ronning N.
<Astrophys. J., 925, 15 (2022)>
=2022ApJ...925...15L 2022ApJ...925...15L
ADC_Keywords: GRB; Redshifts; References; Radio sources
Keywords: Gamma-ray bursts
Abstract:
Gamma-ray burst (GRB) afterglow emission can be observed from sub-TeV
to radio wavelengths, though only 6.6% of observed GRBs present radio
afterglows. We examine GRB radio light curves (LCs) to look for the
presence of radio plateaus resembling the plateaus observed at X-ray
and optical wavelengths. We analyze 404 GRBs from the literature with
observed radio afterglow and fit 82 GRBs with at least five data
points with a broken power-law model, requiring four parameters. From
these, we find 18 GRBs that present a break feature resembling a
plateau. We conduct the first multiwavelength study of the Dainotti
correlation between the luminosity La and the rest-frame time of break
Ta* for those 18 GRBs, concluding that the correlation exists and
resembles the corresponding correlation at X-ray and optical
wavelengths after correction for evolutionary effects. We compare Ta*
for the radio sample with Ta* values in X-ray and optical data,
finding significantly later break times in the radio. We propose that
this late break time and the compatibility in slope suggest either a
long-lasting plateau or the passage of a spectral break in the radio
band. We also correct the distribution of the isotropic energy Eiso
versus the rest-frame burst duration T*90 for evolutionary effects and
conclude that there is no significant difference between the T*90
distributions for the radio LCs with a break and for those without.
Description:
We take our sample from all published radio afterglows in the
literature, mainly observed by the VLA. The largest portion of our
data comes from Chandra & Frail (2012, J/ApJ/746/156), consisting of
304 radio afterglows observed from 1997 to 2011. We extend our search
to 2020, gathering an additional 100 GRBs from the literature for a
total sample of 404 GRBs. We also note that of this sample, four GRBs
have been observed by NAOJ-affiliated telescopes --two by the Atacama
Large Millimeter/submillimeter Array (ALMA), one by the Nobeyama 45m
Radio Telescope, and one by the East Asian VLBI Network.
To attempt a fit to the radio light curves (LCs), we require at least
five observations at the same frequency, leaving us with a final
sample of 82 GRBs.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 119 82 82 GRBs used for fitting
refs.dat 67 33 References
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See also:
J/MNRAS/418/2202 : Analysis of γ-ray bursts (Dainotti+, 2011)
J/ApJ/746/156 : Radio afterglow observations of GRBs (Chandra+, 2012)
J/ApJ/774/157 : Swift GRBs with X-ray afterglows and z<9.5 (Dainotti+, 2013)
J/ApJ/781/37 : Multi-band photometry of GRB 130427A (Perley+, 2014)
J/ApJ/814/1 : GRB 120326A, 100418A & 100901A obs. (Laskar+, 2015)
J/ApJ/806/52 : 8 Fermi GRB afterglows follow-up (Singer+, 2015)
J/ApJ/833/88 : GRB 160509A VLA monitoring campain results (Laskar+, 2016)
J/ApJ/850/161 : Konus-Wind cat. of GRBs with z. I. (Tsvetkova+, 2017)
J/ApJ/858/65 : A VLA study of high-z GRBs. I. GRB140311A (Laskar+, 2018)
J/MNRAS/473/1512 : AMI 15.7GHz GRB catalogue (Anderson+, 2018)
J/ApJ/884/121 : Radio to UV observations of GRB 181201A (Laskar+, 2019)
J/MNRAS/492/1919 : Type I GRBs & the new classification method (Minaev+, 2020)
J/ApJ/893/77 : A comprehensive statistical study of GRBs (Wang+, 2020)
J/A+A/671/A116 : GRB 210731A flux measurements (de Wet+, 2023)
http://www.mpe.mpg.de/~jcg/grbgen.html : Online collection of GRBs
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 3 A3 --- --- [GRB]
4- 10 A7 --- GRB GRB name (YYMMDDA)
12- 17 F6.4 --- z [0.0085/8] Spectroscopic redshift (1)
19- 25 F7.2 s T90 [1/1500] Rest-frame burst duration (1)
27- 31 F5.2 [mW/m2] logFa [13.6/17.4]? Log of flux at the end of the
plateau emission; in erg/s/cm2 units
33- 36 F4.2 [mW/m2] e_logFa [0.01/0.4]? Uncertainty in logFa
38- 41 F4.2 [s] logTa [5.5/7.2]? Log of observed frame time at the
end of the plateau emission
43- 46 F4.2 [s] e_logTa [0.01/0.3]? Uncertainty in logTa
48- 51 F4.2 --- alpha1 [0/0.5]? Best fit power-law slope for t<Ta
53- 56 F4.2 --- e_alpha1 [0.03/0.4]? Uncertainty in alpha1
58- 61 F4.2 --- alpha2 [0.4/7.3]? Best fit power-law slope for t>Ta
63- 67 F5.2 --- e_alpha2 [0.03/11.2]? Uncertainty in alpha2
69- 73 F5.2 [10-7W] logLa [38/44]? Log of luminosity at Ta computed
from best-fit BPL; in erg/s units
75- 78 F4.2 [10-7W] e_logLa [0.01/0.4]? Uncertainty in logLa
80- 84 F5.3 --- beta [0.18/2.1]? GRB radio spectral index
86- 89 F4.2 --- e_beta [0.02/0.4]? Uncertainty in beta
91- 95 F5.2 [10-7J] logEiso [46.6/54.7]? Isotropic energy taken from the
literature, in erg units
97- 100 F4.2 [10-7J] e_logEiso [0/0.7]? Uncertainty in logEiso
102- 112 A11 --- LCref Reference(s) for GRB radio light curves
(see refs.dat file)
114- 119 A6 --- r_logEiso Reference(s) for logEiso (see refs.dat file)
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Note (1): Redshift and T90 taken from Greiner (2021;
http://www.mpe.mpg.de/~jcg/grbgen.html) and GCNs when not given in the
literature.
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Byte-by-byte Description of file: refs.dat
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Bytes Format Units Label Explanations
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1- 2 I2 --- Ref Reference code
4- 25 A22 --- Auth First author's name(s)
27- 45 A19 --- BibCode Bibcode of the reference
47- 67 A21 --- Cat VizieR catalog's reference
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History:
From electronic version of the journal
(End) Prepared by [AAS], Emmanuelle Perret [CDS] 28-Aug-2023