2005ApJ...619..983C

Query : 2005ApJ...619..983C

2005ApJ...619..983C - Astrophys. J., 619, 983-993 (2005/February-1)

Distribution of spectral lags in gamma-ray bursts.

CHEN L., LOU Y.-Q., WU M., QU J.-L., JIA S.-M. and YANG X.-J.

Abstract (from CDS):

Using the data acquired in the time-to-spill (TTS) mode for long gamma-ray bursts (GRBs) by the Burst and Transient Source Experiment (BATSE) on board the Compton Gamma Ray Observatory (CGRO), we have carefully measured spectral lags in time between the low (25-55 keV) and high (110-320 keV) energy bands of individual pulses contained in 64 multipeak GRBs. We find that a temporal lead by higher energy γ-ray photons (i.e., positive lags) is the norm in this selected sample set of long GRBs. While relatively few in number, some pulses of several long GRBs do show negative lags. This distribution of spectral lags in long GRBs is in contrast to that in short GRBs. This apparent difference poses challenges to and places constraints on the physical mechanism(s) for producing long and short GRBs. The relation between the pulse peak count rates and the spectral lags is also examined. Observationally, there seems to be no clear evidence for a systematic spectral lag-luminosity connection for pulses within a given long GRB.

Abstract Copyright: ∼

Journal keyword(s): Gamma Rays: Bursts - Gamma Rays: Observations - Methods: Data Analysis - Plasmas - Radiation Mechanisms: General - Shock Waves

Simbad objects: 68

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Number of rows : 68
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 980203 gB 00 22 -15.1           ~ 13 0
2 1B 911217 gB 00 27.8 +22 40           ~ 19 0
3 4B 960425B gB 00 39.2 +56 31           ~ 9 0
4 GRB 961228C gB 01 00 -59.4           ~ 10 0
5 GRB 961226 gB 01 49 +77.2           ~ 11 0
6 4B 960722 gB 01 58.6 +31 40           ~ 10 0
7 GRB 990802 gB 02 15 +40.8           ~ 10 0
8 GRB 980105 gB 02 22 +48.0           ~ 15 0
9 GRB 961001 gB 02 31 +59.4           ~ 20 0
10 4B 990531 gB 03 29.4 +36 32           ~ 5 0
11 GRB 970201 gB 03 48 -19.0           ~ 13 0
12 GRB 970411 gB 03 56 +34.3           ~ 15 0
13 GRB 980923 gB 05 07.8 -80 36           ~ 51 0
14 GRB 991216 gB 05 09 31.2983 +11 17 07.262           ~ 430 0
15 GRB 961009B gB 05 18 +80.3           ~ 9 0
16 M 1 SNR 05 34 31.8 +22 01 03           ~ 6516 1
17 V* CM Tau Psr 05 34 31.9474694616 +22 00 52.153698024           ~ 5476 0
18 4B 960808 gB 05 41.0 +37 01           ~ 12 0
19 1B 910503 gB 05 49.8 +38 44           ~ 133 0
20 GRB 000307 gB 05 55 +05.8           ~ 18 0
21 4B 960813 gB 05 59.3 +14 55           ~ 12 0
22 GRB 970816 gB 06 00 +41.0           ~ 15 0
23 GRB 000131 gB 06 13 31.08 -51 56 41.7     24.7     ~ 172 1
24 GRB 960912 gB 06 21 +78.8           ~ 20 0
25 GRB 000429 gB 06 32 -04.1           ~ 19 0
26 1B 910523 gB 07 08.0 +00 22           ~ 25 0
27 1B 911109 gB 07 28.0 -26 31           ~ 31 0
28 GRB 000517 gB 07 31 +76.3           ~ 3 0
29 SN 2003lw SN* 08 02 30.1 -39 51 03       20.23   SNIc: 576 0
30 GRB 000115 gB 08 03 30.0 -17 13 30           ~ 29 0
31 GRB 980401A gB 08 24 +15.4           ~ 16 0
32 GRB 000420B gB 08 26 -15.8           ~ 9 0
33 GRB 990104 gB 08 38 +04.7           ~ 19 0
34 1B 910930 gB 08 47.2 -20 37           ~ 22 0
35 1B 910522 gB 09 10.9 -50 53           ~ 45 1
36 4B 960530 gB 09 33.6 -53 47           ~ 31 0
37 4B 970223 gB 09 38 +34.1           ~ 25 0
38 GRB 961228A gB 10 47 -50.4           ~ 9 0
39 GRB 981203 gB 11 00 +32.0           ~ 14 0
40 1B 911118 gB 11 08.1 -20 51           ~ 61 0
41 GRB 980101 gB 13 01 +32.1           ~ 7 0
42 GRB 990510 gB 13 38 07.64 -80 29 48.8           ~ 499 1
43 4B 960113 gB 15 21.1 +06 12           ~ 17 0
44 GRB 990123 gB 15 25 29 +44 45.0     8.95     ~ 1012 1
45 GRB 970111 gB 15 28 15.0 +19 36 18           ~ 140 0
46 1B 911005 gB 15 43.2 +14 44           ~ 18 0
47 GRB 960831 gB 16 31 +16.7           ~ 11 0
48 GRB 990803 gB 17 21 -01.1           ~ 11 0
49 4B 960815 gB 17 41.3 -58 01           ~ 10 0
50 GRB 961102 gB 17 53 +30.3           ~ 17 0
51 GRB 981031 gB 18 16 -25.8           ~ 9 0
52 1B 911031 gB 18 58.2 +21 20           ~ 45 0
53 GRB 970930 gB 19 15 -82.7           ~ 12 0
54 SN 1998bw SN* 19 35 03.17 -52 50 46.1   14.09       SNIc 1928 2
55 1B 910803 gB 20 38.8 +23 31           ~ 16 0
56 1B 910601 gB 20 40.5 +32 20           ~ 94 0
57 GRB 990713B gB 20 59 -29.6           ~ 4 0
58 GRB 000312A gB 21 12 +34.2           ~ 10 1
59 GRB 991229 gB 22 12.0 +33 38           ~ 8 0
60 1B 911223 gB 22 28.0 -50 25           ~ 16 0
61 GRB 990611C gB 22 45 -46.7           ~ 8 0
62 1B 910814 gB 23 05.4 +30 26           ~ 81 0
63 GRB 981130 gB 23 17 -12.0           ~ 11 0
64 GRB 981226 gB 23 29 37.2 -23 55 54           ~ 108 1
65 GRB 970315 gB 23 48 +62.4           ~ 22 0
66 GRB 990619 gB ~ ~           ~ 4 0
67 GRB 970404B gB ~ ~           ~ 4 0
68 GRB 970810 gB ~ ~           ~ 2 0

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