2002A&A...393..409G


C.D.S. - SIMBAD4 rel 1.7 - 2021.06.17CEST20:17:48

2002A&A...393..409G - Astronomy and Astrophysics, volume 393, 409-423 (2002/10-2)

Time resolved spectral analysis of bright gamma ray bursts.

GHIRLANDA G., CELOTTI A. and GHISELLINI G.

Abstract (from CDS):

We present the time integrated and time resolved spectral analysis of a sample of bright bursts selected with Fpeak≥20phot/cm2/s from the BATSE archive. We fitted four different spectral models to the pulse time integrated and time resolved spectra. We compare the low energy slope of the fitted spectra with the prediction of the synchrotron theory [predicting photon spectra softer than N(E)∝E–2/3], and test, through direct spectral fitting, the synchrotron shock model. We point out that differences in the parameters distribution can be ascribed to the different spectral shape of the models employed and that in most cases the spectrum can be described by a smoothly curved function. The synchrotron shock model does not give satisfactory fits to the time averaged and time resolved spectra. Finally, we derive that the synchrotron low energy limit is violated in a considerable number of spectra both during the rise and decay phase around the peak.

Abstract Copyright:

Journal keyword(s): gamma rays: bursts - methods: data analysis - radiation mechanisms: non-thermal

Simbad objects: 40

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Number of rows : 40

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2021
#notes
1 4B 950211 gB 00 38.0 +52 39           ~ 16 0
2 4B 960529 gB 00 57.6 +48 53           ~ 18 0
3 3B 940217 gB 01 56.3 +04 33           ~ 198 0
4 GRB 950403B gB 02 25.6 +10 43           ~ 18 0
5 GRB 960924 gB 02 29.1 +02 42           ~ 26 0
6 GRB 961001 gB 02 31 +59.4           ~ 18 0
7 GRB 950325B gB 03 31.2 +50 30           ~ 13 0
8 GRB 970201 gB 03 48 -19.0           ~ 13 0
9 3B 930506 gB 04 17.8 -05 58           ~ 30 0
10 GRB 970704 gB 04 20 -15.1           ~ 12 0
11 GRB 950325A gB 04 24.9 -11 34           ~ 17 0
12 1B 910503 gB 05 49.8 +38 44           ~ 127 0
13 GRB 990712A gB 08 24 +07.0           ~ 11 0
14 GRB 990104 gB 08 38 +04.7           ~ 18 0
15 2B 920311 gB 08 39.0 -36 34           ~ 34 0
16 3B 940206 gB 10 04.5 -62 37           ~ 26 0
17 4B 960807 gB 10 30.1 +32 08           ~ 19 0
18 4B 950425 gB 10 52.6 -35 15           ~ 24 0
19 GRB 980706 gB 11 00 33 +57 23.1           ~ 20 0
20 GRB 990506 gB 11 54 41 -26 45.0           ~ 159 1
21 GRB 961212 gB 12 02 +34.0           ~ 12 0
22 2B 930131 gB 12 08.2 -08 14           ~ 121 0
23 4B 950403 gB 12 18.6 +56 33           ~ 15 0
24 2B 920720 gB 13 32.1 +36 52           ~ 39 0
25 2B 920517 gB 13 36.4 -16 28           ~ 30 0
26 4B 970420 gB 14 11 58 -15 54.6           ~ 14 0
27 4B 960114 gB 14 24.8 -29 44           ~ 22 0
28 4B 960804 gB 14 34.7 +68 12           ~ 15 0
29 NAME VLA 1623-243 Y*O 16 26 26.42 -24 24 30.0           ~ 387 0
30 [SSG2006] MMS002 smm 16 26 26.50 -24 24 30.9           ~ 241 0
31 2B 921022 gB 16 55.1 -12 25           ~ 32 0
32 3B 930922 gB 18 04.8 +55 53           ~ 21 0
33 3B 930706 gB 18 34.2 -18 58           ~ 31 0
34 GRB 970930 gB 19 15 -82.7           ~ 11 0
35 2B 920406 gB 19 19.6 -57 41           ~ 42 1
36 2B 920525 gB 19 58.5 -42 03           ~ 50 0
37 2B 921207 gB 20 25.3 -42 56           ~ 45 0
38 3B 931031 gB 21 40.4 +62 44           ~ 23 0
39 GRB 961202 gB 22 22 +18.2           ~ 11 0
40 GRB 980125 gB 23 31 +36.0           ~ 18 0

    Equat.    Gal    SGal    Ecl

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