2023ApJ...951....4G

Query : 2023ApJ...951....4G

2023ApJ...951....4G - Astrophys. J., 951, 4 (2023/July-1)

Identification of Extended Emission Gamma-Ray Burst Candidates Using Machine Learning.

GARCIA-CIFUENTES K., BECERRA R.L., DE COLLE F., CABRERA J.I. and DEL BURGO C.

Abstract (from CDS):

Gamma-ray bursts (GRBs) have been classified traditionally based on their duration. The increasing number of extended emission (EE) GRBs, lasting typically more than 2s but with properties similar to those of short GRBs, challenges the traditional classification criteria. In this work, we use the t-distributed stochastic neighbor embedding (t-SNE), a machine-learning technique, to classify GRBs. We present the results for GRBs observed until 2022 July by the Swift/BAT (Burst Alert Telescope) instrument in all its energy bands. We show the effects of varying the learning rate and perplexity parameters as well as the benefit of preprocessing the data by a nonparametric noise-reduction technique. Consistently with previous works, we show that the t-SNE method separates GRBs into two subgroups. We also show that EE GRBs reported by various authors under different criteria tend to cluster in a few regions of our t-SNE maps and identify seven new EE GRB candidates by using the gamma-ray data provided by the automatic pipeline of Swift/BAT and the proximity with previously identified EE GRBs.

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

Journal keyword(s): Gamma-ray bursts - High energy astrophysics

Status at CDS : Large table(s) will be appraised for possible ingestion in VizieR.

Simbad objects: 99

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Number of rows : 99
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 GRB 060912A gB 00 21 08.11 +20 58 18.9           ~ 116 1
2 GRB 140930B gB 00 25 23.40 +24 17 41.7           ~ 52 0
3 Fermi bn100522157 gB 00 27 56.79 +09 24 06.6           ~ 57 0
4 Fermi bn150120123 G 00 41 16.5630 +33 59 42.598           ~ 70 0
5 Fermi bn100117879 G 00 45 04.6610 -01 35 42.020           ~ 155 0
6 GRB 110207A gB 00 50 09.50 -10 47 23.8           ~ 37 0
7 Fermi bn111117510 gB 00 50 46.220 +23 00 39.22           ~ 141 0
8 GRB 050911A gB 00 54 38.290 -38 50 58.50           ~ 66 0
9 GRB 100625A gB 01 03 10.98 -39 05 18.3           ~ 124 0
10 Fermi bn170127634 gB 01 19 54.47 -30 21 28.6           ~ 36 0
11 Fermi bn100814160 gB 01 29 53.61 -17 59 43.6           ~ 219 0
12 GRB 180805B gB 01 43 07.59 -17 29 36.4           ~ 32 0
13 PSO J027.8085-18.5940 G 01 51 14.05011120 -18 35 38.4976680           ~ 192 0
14 Fermi bn081024245 gB 01 51 33.80 +61 21 08.2           ~ 75 0
15 GRB 100906A gB 01 54 44.19 +55 37 49.8           ~ 233 0
16 GRB 060306 gB 02 44 22.830 -02 08 55.00           ~ 119 0
17 GRB 120305A gB 03 10 08.73 +28 29 30.9           ~ 56 0
18 GRB 041224 gB 03 44.8 -06 39           ~ 28 0
19 GRB 070714B G 03 51 22.2720 +28 17 50.943           ~ 248 0
20 GRB 071227A G 03 52 31.0260 -55 59 00.890           ~ 201 0
21 GRB 080913 gB 04 22 57.90 -25 07 38.6           ~ 213 0
22 GRB 060313 G 04 26 28.4020 -10 50 39.901 20.55 21.03 19.66     ~ 156 0
23 GRB 101219A gB 04 58 20.45 -02 32 23.1           ~ 152 0
24 GRB 041226 gB 05 18.2 +73 21           ~ 14 0
25 Fermi bn140209313 gB 05 25 19.00 +32 29 56.1           ~ 47 0
26 GRB 041223 gB 06 40 47.39 -37 04 22.6           ~ 45 0
27 GRB 061006 G 07 24 07.8080 -79 11 55.188           ~ 214 0
28 GRB 091109B gB 07 30 59.90 -54 05 30.6           ~ 57 0
29 Fermi bn160408268 gB 08 10 29.93 +71 07 41.7           ~ 45 0
30 GRB 051227 gB 08 20 58.107 +31 55 32.01           ~ 127 0
31 GRB 090916 gB 08 26 19.60 +25 56 27.3           ~ 29 0
32 GRB 051016B gB 08 48 27.810 +13 39 20.00 20.45         ~ 153 0
33 Fermi bn100704149 gB 08 54 33.92 -24 12 09.7           ~ 103 0
34 NAME GRB 060121 HOST Galaxy G 09 09 52.0260 +45 39 45.538       26.6   ~ 127 0
35 SDSS J093805.33+153719.0 G 09 38 05.33384 +15 37 19.0406           ~ 146 0
36 GRB 061021 gB 09 40 36.120 -21 57 05.40 18.21 19.20 16.82     ~ 160 0
37 GRB 120521A gB 09 54 53.91 -49 25 02.4           ~ 41 0
38 GRB 160525B G 09 57 32.2460 +51 12 24.600           ~ 30 0
39 Fermi bn111228657 gB 10 00 16.04 +18 17 52.2           ~ 201 0
40 GRB 160410A gB 10 02 44.37 +03 28 42.7           ~ 75 0
41 GRB 090715A gB 10 08 24.50 +10 00 22.4           ~ 25 0
42 GRB 150424A gB 10 09 13.35 -26 37 51.2           ~ 94 0
43 GRB 070223 gB 10 13 48.390 +43 08 00.71 21.47         ~ 67 0
44 UCAC4 217-047923 * 10 19 02.5992684123 -46 40 11.294771086   13.795 12.458 12.114   ~ 54 0
45 GRB 090515 gB 10 56 41.0 +14 27 22           ~ 122 0
46 GRB 041217 gB 10 59.2 -17 57           ~ 26 0
47 GRB 121014A gB 11 06 34.70 -29 06 18.3           ~ 20 0
48 GRB 121226A G 11 14 34.1210 -30 24 22.840           ~ 44 0
49 Fermi bn180618030 G 11 19 45.8010 +73 50 15.030           ~ 38 0
50 GRB 080603B gB 11 46 07.46 +68 03 38.5           ~ 153 0
51 GRB 090530 gB 11 57 36.00 +26 35 23.0           ~ 89 0
52 GRB 181123B G 12 17 27.9100 +14 35 52.270           ~ 47 0
53 GRB 090426 G 12 36 18.0470 +32 59 09.460           ~ 237 0
54 GRB 100724A gB 12 58 10.38 -11 06 09.3           ~ 198 0
55 GRB 200716C gB 13 04 02.47 +29 38 38.7           ~ 44 0
56 GRB 110402A gB 13 09 36.54 +61 15 10.3           ~ 67 0
57 SDSS J140910.47+275320.8 G 14 09 10.47535 +27 53 20.8393           ~ 279 0
58 GRB 060801 G 14 12 01.2620 +16 58 55.970           ~ 172 0
59 GRB 150831A gB 14 44 05.84 -25 38 06.3           ~ 38 0
60 GRB 060814 gB 14 45 21.480 +20 35 11.80           ~ 241 0
61 GRB 150423A gB 14 46 18.96 +12 17 00.6           ~ 79 0
62 GRB 111005A gB 14 53 15.60 -19 43 19.1           ~ 78 0
63 GRB 120804A G 15 35 47.5100 -28 46 56.110           ~ 99 0
64 Fermi bn170728961 G 15 51 55.5290 +70 07 22.038           ~ 54 0
65 Fermi bn150301045 gB 16 17 13.13 -48 42 47.2           ~ 31 0
66 GRB 100702A gB 16 22 47.26 -56 31 53.8           ~ 53 0
67 UGCS J162444.39-273226.8 G 16 24 44.38275 -27 32 26.8381     19.70     ~ 469 1
68 GRB 171103A gB 16 38 02.40 -10 12 22.9           ~ 16 0
69 GRB 090531B gB 16 48 15.0 -36 01 27           ~ 58 0
70 GRB 140516A gB 16 51 57.40 +39 57 46.3           ~ 38 0
71 GRB 160927A gB 17 04 58.19 +17 19 55.3           ~ 34 0
72 GRB 161004A gB 17 32 36.57 -00 57 03.2           ~ 24 0
73 GRB 080919 gB 17 40 53.00 -42 22 29.5           ~ 49 0
74 Fermi bn140506880 gB 18 27 06.04 -55 38 08.7           ~ 113 0
75 Fermi bn160821937 gB 18 39 54.550 +62 23 30.35           ~ 190 0
76 GRB 080503 gB 19 06 28.74 +68 47 35.8           ~ 172 0
77 Fermi bn080905499 G 19 10 42.0450 -18 52 54.510           ~ 200 0
78 GRB 041220 gB 19 25 09 +60 37.4           ~ 19 0
79 Fermi bn131004904 gB 19 44 27.20 -02 57 31.0           ~ 113 0
80 Fermi bn080905705 gB 20 06 57.93 -62 33 46.8           ~ 119 0
81 GRB 080702A gB 20 52 12.21 +72 18 46.7           ~ 47 0
82 GRB 060614 G 21 23 32.140 -53 01 36.10           ~ 714 0
83 GRB 051221 G 21 54 48.626 +16 53 27.16 19.49         ~ 377 0
84 Fermi bn151229285 gB 21 57 28.78 -20 43 55.2           ~ 38 0
85 GRB 060607 gB 21 58 50.400 -22 29 46.70 18.49 16.67 15.09     ~ 318 0
86 GRB 051210 gB 22 00 40.930 -57 36 47.10           ~ 138 0
87 Fermi bn160624477 gB 22 00 46.21 +29 38 37.8           ~ 69 0
88 GRB 061201 gB 22 08 32.060 -74 34 47.90           ~ 205 0
89 Fermi bn090510016 G 22 14 12.6230 -26 34 58.550           ~ 548 0
90 GRB 190718A gB 22 26 18.18 -41 12 16.7           ~ 13 0
91 GRB 041228 gB 22 26.6 +05 03           ~ 23 0
92 GRB 080123 gB 22 35 46.100 -64 54 03.24           ~ 98 0
93 Fermi bn200219317 G 22 50 33.1080 -59 07 11.579           ~ 42 0
94 GRB 041219C gB 22 55 52 -76 48.1           ~ 10 0
95 Fermi bn090927422 gB 22 55 53.41 -70 58 49.3           ~ 112 0
96 GRB 070506 gB 23 08 52.390 +10 43 20.30     19.04     ~ 86 0
97 Fermi bn100816026 gB 23 26 57.56 +26 34 42.6           ~ 170 0
98 Fermi bn100212588 gB 23 45 40.39 +49 29 39.6           ~ 56 0
99 GRB 050117A gB 23 53 47.24 +65 56 00.2           ~ 65 0

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