2023ApJ...959...91P

Query : 2023ApJ...959...91P

2023ApJ...959...91P - Astrophys. J., 959, 91 (2023/December-3)

Exploring Physically Motivated Models to Fit Gamma-Ray Burst Spectra.

POOLAKKIL S., PREECE R. and VERES P.

Abstract (from CDS):

We explore fitting gamma-ray burst (GRB) spectra with three physically motivated models, and thus revisit the viability of synchrotron radiation as the primary source of GRB prompt emission. We pick a sample of 100 bright GRBs observed by the Fermi Gamma-ray Burst Monitor (GBM), based on their energy flux values. In addition to the standard empirical spectral models used in previous GBM spectroscopy catalogs, we also consider three physically motivated models; (a) a thermal synchrotron model, (b) a Band model with a high-energy cutoff, and (c) a smoothly broken power-law (SBPL) model with a multiplicative broken power law (MBPL). We then adopt the Bayesian information criterion to compare the fits obtained and choose the best model. We find that 42% of the GRBs from the fluence spectra and 23% of GRBs from the peak-flux spectra have one of the three physically motivated models as their preferred one. From the peak-flux spectral fits, we find that the low-energy index distributions from the empirical model fits for long GRBs peak around the synchrotron value of -2/3, while the two low-energy indices from the SBPL+MBPL fits of long GRBs peak close to the -2/3 and -3/2 values expected for a synchrotron spectrum from marginally fast-cooling electrons.

Abstract Copyright: © 2023. The Author(s). Published by the American Astronomical Society.

Journal keyword(s): Gamma-ray bursts

Simbad objects: 101

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Number of rows : 101
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 Fermi bn120624309 gB 00 19 +07.2           ~ 22 0
2 Fermi bn180113011 gB 00 27 +24.0           ~ 10 0
3 Fermi bn120817168 gB 00 33 -26.4           ~ 25 0
4 Fermi bn131231198 gB 00 42 44.0 -01 29 40           ~ 103 0
5 Fermi bn090227772 gB 00 47 +32.2           ~ 53 0
6 Fermi bn150201574 gB 00 47 19.84 -37 37 07.8           ~ 30 0
7 GRB 140901A gB 01 03 -32.8           ~ 10 0
8 GRB 150510A gB 01 05 +04.8           ~ 23 0
9 Fermi bn110921912 gB 01 12 -27.8           ~ 17 0
10 GRB 101014A gB 01 47.8 -51 04           ~ 31 0
11 GRB 120129A gB 02 02 +59.3           ~ 20 0
12 GRB 160802A gB 02 21 +72.7           ~ 32 0
13 GRB 140416A gB 02 22 +43.9           ~ 17 0
14 Fermi bn170305256 gB 02 35 +12.1           ~ 15 0
15 Fermi bn160422499 gB 02 45 -58.2           ~ 6 0
16 Fermi bn100701490 gB 02 52 -02.2           ~ 20 0
17 Fermi bn120811014 gB 02 55 -31.7           ~ 15 0
18 GRB 110825A gB 02 59.6 +15 24           ~ 33 0
19 GRB 081209 gB 03 01 +63.5           ~ 28 0
20 PSO J047.1631+13.1580 G 03 08 39.14930640 +13 09 29.0253240           ~ 144 0
21 Fermi bn180218635 gB 03 09 +46.7           ~ 8 0
22 GRB 180305A gB 03 18 48.0 +32 06 00           ~ 22 0
23 GRB 170219A gB 03 39 +50.1           ~ 14 0
24 GRB 131028A gB 03 48 +72.2           ~ 14 0
25 GRB 160720A gB 03 52 36.7 +73 53 35           ~ 12 0
26 Fermi bn150819440 gB 03 58 +39.7           ~ 12 0
27 Fermi bn151231443 gB 04 22 -61.5           ~ 7 0
28 GRB 171010A gB 04 26 19.41 -10 27 47.9           SNIc-BL 109 0
29 GRB 130502B gB 04 27 02.90 +71 03 38.5           ~ 31 0
30 GRB 090617 gB 05 15.6 +15 39           ~ 26 0
31 Fermi bn140209313 gB 05 25 19.00 +32 29 56.1           ~ 47 0
32 GRB 131229A gB 05 40 55.61 -04 23 46.6           ~ 35 0
33 GRB 090820 gB 05 51 +27.1           ~ 44 0
34 Fermi bn100829876 gB 06 02 +30.3           ~ 20 0
35 Fermi bn120711115 gB 06 18 42.839 -70 59 56.78           ~ 125 0
36 GRB 150213A gB 06 21 -04.8           ~ 15 0
37 Fermi bn180703949 gB 06 28 -29.9           ~ 18 0
38 Fermi bn131014215 gB 06 41 12.80 -19 05 49.6           ~ 50 0
39 GRB 100223A gB 06 58 +03.7           ~ 23 0
40 Fermi bn161218222 gB 07 01 -19.7           ~ 4 0
41 GRB 091012 gB 07 18 +87.3           ~ 18 0
42 Fermi bn120426090 gB 07 26 -65.6           ~ 17 0
43 GRB 150210A gB 07 28.6 +13 16           ~ 21 0
44 GRB 100719D gB 07 33 +05.4           ~ 20 0
45 Fermi bn130305486 gB 07 46 59.45 +52 02 00.2           ~ 35 0
46 GRB 150627A gB 07 49 52.95 -51 29 22.5           ~ 24 0
47 GRB 110529A gB 07 53.3 +67 55           ~ 27 0
48 GRB 081215A gB 08 22 +54.0           ~ 57 0
49 Fermi bn081216531 gB 08 37 +07.6           ~ 35 0
50 GRB 101123A gB 08 45.0 +06 31           ~ 27 0
51 GRB 160530B gB 08 54 +43.5           ~ 14 0
52 GRB 171119A gB 09 02 -47.0           ~ 10 0
53 Fermi bn140329295 gB 09 43 -32.2           ~ 17 0
54 Fermi bn170808936 gB 09 43 +02.2           ~ 15 0
55 GRB 110705A gB 10 24 +40.1           ~ 22 0
56 Fermi bn150118927 gB 10 40 -27.6           ~ 9 0
57 GRB 160821A gB 11 25 01 +42 20.7           ~ 71 0
58 Fermi bn180113418 gB 11 38 -64.7           ~ 12 0
59 GRB 121127A gB 11 46 -52.4           ~ 15 0
60 GRB 111222A gB 11 56 52.92 +69 04 14.8           ~ 33 0
61 Fermi bn150811849 gB 12 25 23.5 -14 06 18           ~ 6 0
62 GRB 170115B gB 12 36 -46.9           ~ 25 0
63 GRB 090424 gB 12 38 07.40 +16 49 45.9           ~ 269 0
64 Fermi bn170527480 gB 13 01 +00.9           ~ 16 0
65 Fermi bn140102887 gB 14 07 40.65 +01 19 59.8           ~ 53 0
66 Fermi bn150902733 gB 14 19 54.18 -69 21 09.9           ~ 30 0
67 Fermi bn131126163 gB 14 22 +53.5           ~ 15 0
68 GRB 130606B gB 14 34 07.04 -22 06 08.2           ~ 47 0
69 GRB 160910A gB 14 45 46.04 +39 04 01.3           ~ 45 0
70 GRB 110301A gB 15 17.4 +29 24           ~ 53 0
71 Fermi bn150118409 gB 16 01 -35.8           ~ 18 0
72 Fermi bn081009140 gB 16 42 +18.4           ~ 40 0
73 GRB 091003A gB 16 46 04.680 +36 37 31.08           ~ 135 0
74 Fermi bn180402406 gB 16 47 43.90 -14 58 12.1           ~ 31 0
75 GRB 140508A gB 17 01 51.95 +46 46 49.5           ~ 76 0
76 Fermi bn141011282 gB 17 11 45.0 -09 40 52           ~ 13 0
77 Fermi bn090902462 gB 17 39 45.26 +27 19 28.1           ~ 440 0
78 GRB 130804A gB 18 40 -76.2           ~ 14 0
79 Fermi bn130515056 gB 18 53 45.65 -54 16 45.0           ~ 55 0
80 GRB 100826A gB 18 56 -23.2           ~ 79 0
81 GRB 110625A gB 19 06 55.85 +06 45 19.2           ~ 69 0
82 GRB 221009A gB 19 13 03.85 +19 46 22.7           ~ 433 0
83 GRB 090618 gB 19 36 01.80 +78 21 07.1           ~ 358 0
84 Fermi bn150922234 gB 19 38 -05.5           ~ 7 0
85 GRB 160625B gB 20 34 23.67 +06 55 11.1           ~ 235 0
86 GRB 150403A gB 20 46 01.17 -62 42 40.1           ~ 116 0
87 Fermi bn160509374 gB 20 47 00.90 +76 06 30.1           ~ 141 0
88 Fermi bn130628860 gB 20 51 +06.1           ~ 7 0
89 Fermi bn140206275 gB 21 01 -08.5           ~ 28 0
90 Fermi bn130701761 gB 21 44 -30.9           ~ 5 0
91 Fermi bn150330828 gB 21 57 +50.0           ~ 22 0
92 GRB 180204A gB 22 00 31.98 +30 50 16.4           ~ 25 0
93 Fermi bn090510016 G 22 14 12.6230 -26 34 58.550           ~ 548 0
94 Fermi bn170708046 gB 22 23 +19.8           ~ 11 0
95 GRB 170127C gB 22 37 -63.9           ~ 39 0
96 GRB 100811A gB 23 04 +15.9           ~ 16 0
97 Fermi bn170409112 gB 23 10 -07.1           ~ 18 0
98 GRB 170816A gB 23 23 +12.9           ~ 10 0
99 Fermi bn090926181 gB 23 33 36.18 -66 19 25.9           ~ 339 0
100 GRB 130518A gB 23 42 39.79 +47 27 55.2           ~ 86 0
101 Fermi bn161218356 gB 23 54 -16.9           ~ 21 0

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