2009ApJ...693..922S

Query : 2009ApJ...693..922S

2009ApJ...693..922S - Astrophys. J., 693, 922-935 (2009/March-1)

Epeak estimator for gamma-ray bursts observed by the Swift burst alert telescope.

SAKAMOTO T., SATO G., BARBIER L., BARTHELMY S.D., CUMMINGS J.R., FENIMORE E.E., GEHRELS N., HULLINGER D., KRIMM H.A., LAMB D.Q., MARKWARDT C.B., PALMER D.M., PARSONS A.M., STAMATIKOS M., TUELLER J. and UKWATTA T.N.

Abstract (from CDS):

We report a correlation based on a spectral simulation study of the prompt emission spectra of gamma-ray bursts (GRBs) detected by the Swift Burst Alert Telescope (BAT). The correlation is between the Epeakenergy, which is the peak energy in the νFνspectrum, and the photon index (Γ) derived from a simple power-law (PL) model. The Epeak-Γ relation, assuming the typical smoothly broken PL spectrum of GRBs, is log Epeak= 3.258 - 0.829 Γ (1.3 ≤ Γ ≤ 2.3). We take into account not only a range of Epeak energies and fluences, but also distributions for both the low-energy photon index and the high-energy photon index in the smoothly broken PL model. The distribution of burst durations in the BAT GRB sample is also included in the simulation. Our correlation is consistent with the index observed by BAT and Epeak measured by the BAT, and by other GRB instruments. Since about 85% of GRBs observed by the BAT are acceptably fit with the simple PL model because of the relatively narrow energy range of the BAT, this relationship can be used to estimate Epeak when it is located within the BAT energy range.

Abstract Copyright: ∼

Journal keyword(s): gamma rays: bursts

Simbad objects: 53

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Number of rows : 53
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 050326 gB 00 27 49.110 -71 22 16.40   20.55       ~ 61 0
2 GRB 050824 gB 00 48 56.100 +22 36 32.00 19.66 21.03 20.46 23.70   ~ 184 0
3 GRB 060825 gB 01 12 29.520 +55 47 51.59           ~ 49 0
4 GRB 060908 gB 02 07 18.360 +00 20 31.20 16.99 18.34 16.85     ~ 217 0
5 GRB 070220 gB 02 19 06.810 +68 48 16.11           ~ 57 0
6 GRB 050603 gB 02 39 56.839 -25 10 54.92     18.48     ~ 174 0
7 GRB 061007 gB 03 05 19.510 -50 30 02.50 14.28 14.40 12.95     ~ 315 1
8 GRB 060115 gB 03 36 08.400 +17 20 43.00           ~ 179 0
9 GRB 041224 gB 03 44.8 -06 39           ~ 28 0
10 GRB 060211A gB 03 53 32.600 +21 29 19.20           ~ 53 0
11 GRB 070328 gB 04 20 27.680 -34 04 00.60 20.29         ~ 97 0
12 GRB 060313 G 04 26 28.4020 -10 50 39.901 20.55 21.03 19.66     ~ 156 0
13 GRB 050219B gB 05 25 15.990 -57 45 28.70   21.38 20.40     ~ 57 0
14 GRB 050410 gB 05 59 13.460 +79 36 12.00           ~ 53 0
15 GRB 060510 gB 06 23.4 -01 10           ~ 10 0
16 GRB 060813 gB 07 27 35.380 -29 50 49.40           ~ 62 0
17 GRB 070420 gB 08 04 55.170 -45 33 19.99 20.39 20.01 17.16     ~ 83 0
18 GRB 051021B gB 08 24 12.260 -45 32 28.80           ~ 39 0
19 GRB 050416B gB 08 55 34.910 +11 10 30.70           ~ 29 0
20 GRB 050820B gB 09 02 25.370 -72 38 43.69           ~ 36 0
21 GRB 061021 gB 09 40 36.120 -21 57 05.40 18.21 19.20 16.82     ~ 160 0
22 GRB 061121 gB 09 48 54.570 -13 11 42.68 17.19 17.71 17.02     ~ 350 0
23 GRB 041217 gB 10 59.2 -17 57           ~ 26 0
24 GRB 050219A gB 11 05 38.990 -40 41 03.00           ~ 97 0
25 GRB 050215B gB 11 37 48.030 +40 47 43.39           ~ 71 0
26 GRB 050124 gB 12 51 30.560 +13 02 39.50           ~ 62 0
27 GRB 051008 gB 13 31 28.100 +42 08 05.01 17.06   14.11     ~ 90 0
28 GRB 060206 gB 13 31 43.420 +35 03 03.60   19.99 17.09     ~ 330 0
29 GRB 060204B gB 14 07 14.900 +27 40 36.40           ~ 93 0
30 GRB 050915B gB 14 36 25.890 -67 24 33.21           ~ 56 0
31 GRB 050128 gB 14 38 17.750 -34 45 55.61           ~ 68 0
32 GRB 060814 gB 14 45 21.480 +20 35 11.80           ~ 241 0
33 GRB 060428B gB 15 41 25.570 +62 01 28.93 20.64 20.62 19.50     ~ 71 0
34 GRB 060904A gB 15 50 54.560 +44 59 10.51           ~ 77 0
35 GRB 070521 gB 16 10 38.600 +30 15 22.70           ~ 164 0
36 GRB 060322 gB 18 16 56.54 -36 42 32.4           ~ 30 0
37 GRB 060111A gB 18 24 49.132 +37 36 14.47     18.86     ~ 72 0
38 SN 2005nc SN* 18 32 32.560 +26 20 22.34           SNIc: 400 1
39 GRB 050815 gB 19 34 23.147 +09 08 47.47 20.96 20.45 18.10     ~ 40 0
40 GRB 060105 gB 19 50 00.680 +46 20 55.40           ~ 87 0
41 GRB 050925 gB 20 13 47.570 +34 19 51.40           ~ 72 0
42 GRB 070508 gB 20 51 11.810 -78 23 04.88     19.62     ~ 144 0
43 GRB 050922C gB 21 09 33.000 -08 45 30.10 15.15 15.86 14.69     ~ 301 0
44 GRB 050713A gB 21 22 09.530 +77 04 29.50           ~ 125 0
45 GRB 060117 gB 21 51 36.130 -59 58 39.10           ~ 63 0
46 GRB 060927A gB 21 58 11.930 +05 21 50.32           ~ 215 0
47 GRB 051109A gB 22 01 15.320 +40 49 23.70   20.09 20.14     ~ 190 0
48 GRB 061201 gB 22 08 32.060 -74 34 47.90           ~ 205 0
49 GRB 050820A gB 22 29 38.110 +19 33 37.10 18.33 19.00 18.47     ~ 409 0
50 GRB 050716 gB 22 34 20.730 +38 41 03.60   21.52 20.32     ~ 76 0
51 GRB 060707 gB 23 48 19.000 -17 54 17.00     19.79     ~ 170 0
52 GRB 061222A gB 23 53 03.419 +46 31 58.60           ~ 177 0
53 GRB 050117A gB 23 53 47.24 +65 56 00.2           ~ 65 0

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