2018ApJ...862..155L

Query : 2018ApJ...862..155L

2018ApJ...862..155L - Astrophys. J., 862, 155-155 (2018/August-1)

Characteristics of two-episode emission patterns in Fermi long gamma-ray bursts.

LAN L., LU H.-J., ZHONG S.-Q., ZHANG H.-M., RICE J., CHENG J.-G., DU S.-S., LI L., LIN J., LU R.-J. and LIANG E.-W.

Abstract (from CDS):

Two-episode emission components separated by quiescent gaps in the prompt emission of gamma-ray bursts (GRBs) have been observed in the Swift era, but there is a lack of spectral information due to the narrow energy band of the Swift/Burst Alert Telescope. In this paper, a systematic analysis of the spectral and temporal properties of the prompt emission of 101 Fermi/Gamma-ray Burst Monitor detected long GRBs show the existence of two-episode emission components in the light curves, with quiescent times of up to hundreds of seconds. We focus on investigating the differences of those two emission episodes. We find that the light curves of the two emission components exhibit different behavior, e.g., a soft emission component that either precedes or follows the main prompt emission or that the intensity of the two emission episodes are comparable with each other. No statistically significant correlation in the duration of the two emission episodes can be claimed. We define a new parameter ε as the ratio of the peak flux of the first and second emission episodes and find that a higher ε corresponds to a larger fluence. The preferred spectral model in our analysis is a cutoff power-law model for most GRBs. The distribution of Ep for episodes I and II range from tens of keV to 1000 keV with a lognormal fit and there are no significant differences between them. Moreover, we do not find significant relationships between ε and Ep for the two emission episodes. Those results suggest that these two-episode emission components likely share the same physical origin.

Abstract Copyright: © 2018. The American Astronomical Society. All rights reserved.

Journal keyword(s): gamma-ray burst: general - methods: statistical

VizieR on-line data: <Available at CDS (J/ApJ/862/155): table1.dat>

Simbad objects: 103

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Number of rows : 103
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2024 		#notes
1 Fermi bn150228981 gB 00 30 -61.7           ~ 2 0
2 Fermi bn160325291 gB 01 02 36.28 -72 41 48.5           ~ 36 0
3 Fermi bn150426594 gB 01 10 -30.2           ~ 2 0
4 Fermi bn110921912 gB 01 12 -27.8           ~ 17 0
5 Fermi bn140824606 gB 01 13 +58.6           ~ 3 0
6 Fermi bn150507026 gB 01 16 -03.8           ~ 2 0
7 Fermi bn100322045 gB 01 25 -12.4           ~ 20 0
8 Fermi bn130106995 gB 01 55 +63.4           ~ 4 0
9 Fermi bn091208410 gB 01 57 38.50 +16 52 50.7           ~ 191 0
10 GRB 151107B gB 02 05 +45.6           ~ 13 0
11 Fermi bn140110814 gB 02 08 +65.2           ~ 3 0
12 GRB 160802A gB 02 21 +72.7           ~ 22 0
13 Fermi bn120412920 gB 02 36 +07.1           ~ 10 0
14 Fermi bn091030828 gB 02 47 +21.5           ~ 17 0
15 GRB 110825A gB 02 59.6 +15 24           ~ 31 0
16 Fermi bn130609902 gB 03 35 05.11 -40 10 26.7           ~ 47 0
17 Fermi bn151231443 gB 04 22 -61.5           ~ 5 0
18 Fermi bn110926107 gB 04 38 +10.4           ~ 9 0
19 Fermi bn170115662 gB 05 26 -18.7           ~ 3 0
20 Fermi bn100619015 gB 05 38 28.0 -27 00 02           ~ 52 0
21 GRB 090328 gB 06 02 39.69 -41 52 55.1           ~ 171 1
22 GRB 090717A gB 06 10 -62.5           ~ 30 0
23 Fermi bn120711115 gB 06 18 42.839 -70 59 56.78           ~ 104 0
24 Fermi bn100517072 gB 06 44 -29.0           ~ 14 0
25 Fermi bn170209048 gB 07 23 -52.2           ~ 10 0
26 Fermi bn130815660 gB 07 30 -02.1           ~ 10 0
27 GRB 100719D gB 07 33 +05.4           ~ 19 0
28 GRB 150523A gB 07 41 08.67 -45 25 13.6           ~ 21 0
29 Fermi bn140810782 gB 07 56 +27.5           ~ 16 0
30 Fermi bn170514180 gB 08 08 -25.3           ~ 6 0
31 Fermi bn140827763 gB 08 42 +35.8           ~ 2 0
32 Fermi bn130522510 gB 08 56 +17.6           ~ 3 0
33 Fermi bn150220598 gB 09 02 -01.6           ~ 12 0
34 Fermi bn161220605 gB 09 12 -29.2           ~ 2 0
35 Fermi bn100709602 gB 09 30 +17.4           ~ 14 0
36 Fermi bn111228657 gB 10 00 16.04 +18 17 52.2           ~ 165 0
37 Fermi bn160225809 gB 10 01 -34.7           ~ 5 0
38 GRB 110824A gB 10 08 +01.3           ~ 13 0
39 Fermi bn110709463 gB 10 22 +23.1           ~ 11 0
40 GRB 131108A gB 10 26 00.480 +09 39 44.05           ~ 77 0
41 Fermi bn170510217 gB 10 40 36.94 -39 12 45.0           ~ 19 0
42 Fermi bn130530719 gB 10 44 +25.2           ~ 3 0
43 Fermi bn111024722 gB 10 51 -44.9           ~ 9 0
44 Fermi bn160303201 gB 10 53 57.6 +56 56 24           ~ 3 0
45 Fermi bn110903009 gB 10 57 +42.1           ~ 11 0
46 GRB 110709B gB 10 58 37.2 -23 27 18           ~ 83 0
47 Fermi bn121031949 gB 11 23 04.85 -03 31 01.3           ~ 29 0
48 Fermi bn120530121 gB 11 44 +78.8           ~ 9 0
49 Fermi bn100615083 gB 11 48 49.25 -19 28 52.2           ~ 112 0
50 Fermi bn101231067 gB 12 47 +17.6           ~ 12 0
51 Fermi bn130320560 gB 13 02 -71.3           ~ 8 0
52 GRB 110903A gB 13 08 15.82 +58 58 53.8           ~ 29 0
53 Fermi bn140818229 gB 13 18 15.08 +06 55 22.6           ~ 14 0
54 Fermi bn130121835 gB 14 05 -49.5           ~ 5 0
55 GRB 090529 gB 14 09 52.49 +24 27 33.5           ~ 81 0
56 Fermi bn120618919 gB 14 14 -02.1           ~ 8 0
57 GRB 150729A gB 14 37 +05.8           ~ 3 0
58 Fermi bn150619287 gB 14 39 +08.6           ~ 2 0
59 Fermi bn121029350 gB 15 07 -28.2           ~ 12 0
60 GRB 091120 gB 15 07.2 -21 47           ~ 33 0
61 Fermi bn150118409 gB 16 01 -35.8           ~ 16 0
62 Fermi bn120605453 gB 16 14 +41.5           ~ 12 0
63 Fermi bn081009140 gB 16 42 +18.4           ~ 37 0
64 Fermi bn150323395 gB 17 21 48.83 +38 19 04.6           ~ 17 0
65 Fermi bn100224112 gB 17 58 -17.1           ~ 15 0
66 Fermi bn151027166 gB 18 09 56.87 +61 21 12.3           ~ 111 0
67 Fermi bn170208553 gB 18 58 -00.1           ~ 5 0
68 Fermi bn151227218 gB 19 12 +31.9           ~ 4 0
69 Fermi bn101224578 gB 19 16 -55.2           ~ 11 0
70 Fermi bn140512814 gB 19 17 28.81 -15 05 39.5           ~ 102 0
71 Fermi bn091123298 gB 19 48 -29.2           ~ 16 0
72 Fermi bn151030999 gB 19 50 31.2 +30 51 00           ~ 5 0
73 Fermi bn130219775 gB 20 15 +40.8           ~ 9 0
74 Fermi bn100116897 gB 20 20 +14.4           ~ 38 0
75 Fermi bn121118576 gB 20 29 +63.2           ~ 5 0
76 Fermi bn170317666 gB 20 32 -53.8           ~ 2 0
77 Fermi bn170130510 gB 20 35 +01.4           ~ 3 0
78 Fermi bn121225417 gB 20 42 -34.8           ~ 12 0
79 Fermi bn110717319 gB 20 51 -14.8           ~ 14 0
80 Fermi bn120716712 gB 20 52 12.17 +09 35 53.9           ~ 63 0
81 Fermi bn121113544 gB 20 53 +59.8           ~ 4 0
82 GRB 130821A gB 20 56 38.440 -12 02 36.53           ~ 22 0
83 GRB 101023A gB 21 11 51.26 -65 23 17.7           ~ 67 0
84 Fermi bn140108721 gB 21 40 26.77 +58 44 41.4           ~ 52 0
85 Fermi bn150430015 gB 21 45 55.17 -27 54 06.4           ~ 17 0
86 Fermi bn150330828 gB 21 57 +50.0           ~ 18 0
87 Fermi bn090524346 gB 21 58 -67.4           ~ 20 0
88 Fermi bn130720582 gB 22 32 -09.4           ~ 6 0
89 Fermi bn170423719 gB 22 57 -04.3           ~ 5 0
90 Fermi bn170409112 gB 23 10 -07.1           ~ 16 0
91 Fermi bn150126868 gB 23 22 00.7 -12 22 05           ~ 8 0
92 GRB 150724B gB 23 27 33.88 +03 49 06.4           ~ 16 0
93 GRB 090131 gB 23 29.2 +21 12           ~ 37 0
94 GRB 110729A gB 23 34 +05.0           ~ 14 0
95 Fermi bn131108024 gB 23 34 +33.9           ~ 5 0
96 Fermi bn140304849 gB 23 37 -27.0           ~ 5 0
97 Fermi bn121122870 gB 23 42 +06.3           ~ 3 0
98 Fermi bn170228773 gB 23 44 +15.7           ~ 5 0
99 Fermi bn160215773 gB 23 47 09.6 +01 43 48           ~ 9 0
100 Fermi bn140323433 gB 23 47 50.31 -79 54 16.4           ~ 31 0
101 Fermi bn140406120 gB 23 50 +05.6           ~ 3 0
102 Fermi bn080724401 gB 23 53 +32.9           ~ 15 0
103 Fermi bn110904124 gB 23 59 +35.9           ~ 10 0

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