2001A&A...376...10S


C.D.S. - SIMBAD4 rel 1.7 - 2020.10.24CEST17:47:42

2001A&A...376...10S - Astronomy and Astrophysics, volume 376, 10-16 (2001/9-2)

Luminosity function of GRBs.

SETHI S. and BHARGAVI S.G.

Abstract (from CDS):

We attempt to constrain the luminosity function of Gamma Ray Bursts (GRBs) from the observed number count-flux relation and the afterglow redshift data. We assume three classes of luminosity functions for our analysis: (a) Log-normal distribution, (b) Schechter distribution, and (c) Scale-free distribution. We assume several models of the evolution of the GRB population for each luminosity function. Our analysis shows that: (a) log-normal is the only luminosity function that is compatible with both the observations. This result is independent of the GRB evolution model, (b) for log-normal function, the average photon luminosity L0 and the width of the luminosity function σ that are compatible with both the observations fall in the range: 1055s–1≲L0≲1056s–1 and 2≲σ≲3, (c) the agreement of observations with other luminosity functions requires the GRB population to evolve more strongly than the evolution of the star-formation rate of the universe.

Abstract Copyright:

Journal keyword(s): gamma rays: bursts - cosmology: observations

Simbad objects: 18

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Number of rows : 18

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2020
#notes
1 GRB 970228 gB 05 01 46.7 +11 46 53           ~ 626 1
2 GRB 991216 gB 05 09 31.2983 +11 17 07.262           ~ 408 1
3 GRB 000131 gB 06 13 31.08 -51 56 41.7     24.7     ~ 161 1
4 GRB 970508 gB 06 53 49.2 +79 16 19           ~ 842 1
5 GRB 980326 gB 08 36 34.3 -18 51 24           ~ 258 0
6 GRB 980613 gB 10 17 57.8 +71 27 26           ~ 198 1
7 GRB 990506 gB 11 54 41 -26 45.0           ~ 158 1
8 GRB 971214 gB 11 56 26.4 +65 12 01           ~ 434 1
9 GRB 000418 gB 12 25 21 +20 05.0           ~ 201 0
10 GRB 990510 gB 13 38 07.64 -80 29 48.8           ~ 466 1
11 GRB 990123 gB 15 25 29 +44 45.0     8.95     ~ 964 1
12 GRB 000301C gB 16 20 18.5 +29 26 35           ~ 341 2
13 GRB 991208 gB 16 33 53.51 +46 27 21.5           ~ 243 1
14 GRB 000926 gB 17 04 15 +51 46.0           ~ 342 2
15 GRB 970828 gB 18 08 31.6 +59 18 51           ~ 336 1
16 SN 1998bw SN* 19 35 03.17 -52 50 46.1   14.09       SNIc 1658 2
17 GRB 990712 gB 22 31 53.061 -73 24 28.58           ~ 251 1
18 GRB 980703 gB 23 59 06.7 +08 35 07           ~ 422 1

    Equat.    Gal    SGal    Ecl

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2020.10.24-17:47:42

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