2012ApJ...750...88Z

Query : 2012ApJ...750...88Z

2012ApJ...750...88Z - Astrophys. J., 750, 88 (2012/May-2)

Revisiting the Long/Soft-Short/Hard classification of gamma-ray bursts in the Fermi era.

ZHANG F.-W., SHAO L., YAN J.-Z. and WEI D.-M.

Abstract (from CDS):

We perform a statistical analysis of the temporal and spectral properties of the latest Fermi gamma-ray bursts (GRBs) to revisit the classification of GRBs. We find that the bimodalities of duration and the energy ratio (E peak/Fluence) and the anti-correlation between spectral hardness (hardness ratio (HR), peak energy, and spectral index) and duration (T90) support the long/soft-short/hard classification scheme for Fermi GRBs. The HR-T90 anti-correlation strongly depends on the spectral shape of GRBs and energy bands, and the bursts with the curved spectra in the typical BATSE energy bands show a tighter anti-correlation than those with the power-law spectra in the typical BAT energy bands. This might explain why the HR-T90correlation is not evident for those GRB samples detected by instruments like Swift with a narrower/softer energy bandpass. We also analyze the intrinsic energy correlation for the GRBs with measured redshifts and well-defined peak energies. The current sample suggests E_p, rest_= 2455x(Eiso/1052)0.59 for short GRBs, significantly different from that for long GRBs. However, both the long and short GRBs comply with the same E_p, rest–Liso_correlation.

Abstract Copyright: ∼

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

Simbad objects: 44

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Number of rows : 44
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 bn100117879 G 00 45 04.6610 -01 35 42.020           ~ 155 0
2 SN 2010ma SN* 00 48 55.35 -34 33 59.5           SNIc 190 1
3 Fermi bn100814160 gB 01 29 53.61 -17 59 43.6           ~ 219 0
4 GRB 081222 gB 01 30 57.76 -34 05 44.0           ~ 199 0
5 GRB 100906A gB 01 54 44.19 +55 37 49.8           ~ 233 0
6 Fermi bn091208410 gB 01 57 38.50 +16 52 50.7           ~ 220 0
7 SN 2009nz SN* 02 26 19.87 -18 57 08.6           ~ 307 1
8 GRB 070714A gB 02 51 43.36 +30 14 35.1           ~ 63 0
9 Fermi bn110213220 gB 02 51 51.37 +49 16 21.2           ~ 175 0
10 Fermi bn100728439 gB 02 56 13.44 +00 16 51.6           ~ 142 0
11 Fermi bn090926914 gB 03 05 14.30 -38 59 50.9           ~ 149 1
12 GRB 071227A G 03 52 31.0260 -55 59 00.890           ~ 201 0
13 GRB 080913 gB 04 22 57.90 -25 07 38.6           ~ 213 0
14 GRB 101219A gB 04 58 20.45 -02 32 23.1           ~ 152 0
15 GRB 970228 gB 05 01 46.7 +11 46 53           ~ 650 1
16 GRB 090328 gB 06 02 39.69 -41 52 55.1           ~ 194 1
17 GRB 061006 G 07 24 07.8080 -79 11 55.188           ~ 214 0
18 GRB 080916C gB 07 59 23.24 -56 38 16.8           ~ 386 0
19 Fermi bn090516353 gB 09 12 59 -11 50.9           ~ 173 0
20 Fermi bn090423330 gB 09 55 33.19 +18 08 57.7           ~ 392 0
21 Fermi bn091020900 gB 11 42 55.20 +50 58 42.0           ~ 188 0
22 GRB 090426 G 12 36 18.0470 +32 59 09.460           ~ 237 0
23 GRB 090424 gB 12 38 07.40 +16 49 45.9           ~ 269 0
24 Fermi bn090323002 gB 12 42 50.28 +17 03 11.9           ~ 244 1
25 Fermi bn100414097 gB 12 48 30.0 +08 41 35           ~ 136 0
26 GRB 090429B gB 14 02 40.10 +32 10 14.6           ~ 166 0
27 Fermi bn100112418 gB 16 08.6 -77 32           ~ 10 0
28 GRB 091003A gB 16 46 04.680 +36 37 31.08           ~ 135 0
29 Fermi bn090902462 gB 17 39 45.26 +27 19 28.1           ~ 440 0
30 GRB 080503 gB 19 06 28.74 +68 47 35.8           ~ 172 0
31 SN 1998bw SN* 19 35 03.17 -52 50 46.1   14.09       SNIc 1928 2
32 GRB 090618 gB 19 36 01.80 +78 21 07.1           ~ 358 0
33 Fermi bn100207665 gB 20 32 -27.7           ~ 11 0
34 GRB 060614 G 21 23 32.140 -53 01 36.10           ~ 714 0
35 GRB 051221 G 21 54 48.626 +16 53 27.16 19.49         ~ 377 0
36 GRB 060505 gB 22 07 03.440 -27 48 51.89           ~ 286 1
37 Fermi bn090510016 G 22 14 12.6230 -26 34 58.550           ~ 548 0
38 Fermi bn080916406 gB 22 25 09.30 -57 01 33.7           ~ 177 0
39 SN 2008hw SN* 22 39 50.39 -40 08 49.1           SNIc 197 1
40 Fermi bn090927422 gB 22 55 53.41 -70 58 49.3           ~ 112 0
41 NVSS J230126-385839 rG 23 01 26.7650 -38 58 40.422   22.22 21.22 21   ~ 325 1
42 Fermi bn100816026 gB 23 26 57.56 +26 34 42.6           ~ 170 0
43 Fermi bn090926181 gB 23 33 36.18 -66 19 25.9           ~ 339 0
44 Fermi bn080810549 gB 23 47 08.00 +00 18 35.1           ~ 240 0

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