2006A&A...447..897J


C.D.S. - SIMBAD4 rel 1.7 - 2020.12.02CET11:27:03

2006A&A...447..897J - Astronomy and Astrophysics, volume 447, 897-903 (2006/3-1)

A mean redshift of 2.8 for Swift gamma-ray bursts.

JAKOBSSON P., LEVAN A., FYNBO J.P.U., PRIDDEY R., HJORTH J., TANVIR N., WATSON D., JENSEN B.L., SOLLERMAN J., NATARAJAN P., GOROSABEL J., CASTRO CERON J.M., PEDERSEN K., PURSIMO T., ARNADOTTIR A.S., CASTRO-TIRADO A.J., DAVIS C.J., DEEG H.J., FIUZA D.A., MYKOLAITIS S. and SOUSA S.G.

Abstract (from CDS):

The exceptionally high luminosities of gamma-ray bursts (GRBs), gradually emerging as extremely useful probes of star formation, make them promising tools for exploration of the high-redshift Universe. Here we present a carefully selected sample of Swift GRBs, intended to estimate in an unbiased way the GRB mean redshift (zmean), constraints on the fraction of high-redshift bursts and an upper limit on the fraction of heavily obscured afterglows. We find that zmean=2.8 and that at least 7% of GRBs originate at z>5. In addition, consistent with pre-Swift observations, at most 20% of afterglows can be heavily obscured. The redshift distribution of the sample is qualitatively consistent with models where the GRB rate is proportional to the star formation rate in the Universe. We also report optical, near-infrared and X-ray observations of the afterglow of GRB050814, which was seen to exhibit very red optical colours. By modelling its spectral energy distribution we find that z=5.3±0.3. The high mean redshift of GRBs and their wide redshift range clearly demonstrates their suitability as efficient probes of galaxies and the intergalactic medium over a significant fraction of the history of the Universe.

Abstract Copyright:

Journal keyword(s): cosmology: observations - dust, extinction - early Universe - galaxies: high-redshift - gamma rays: bursts

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 GRB 050922B gB 00 23 13.400 -05 36 17.80           ~ 65 0
2 GRB 021004 gB 00 26 54.68 +18 55 41.6           ~ 516 1
3 GRB 050824 gB 00 48 56.100 +22 36 32.00 19.66 21.03 20.46     ~ 156 0
4 NAME SMC G 00 52 38.0 -72 48 01   2.79 2.2     ~ 9610 1
5 GRB 050904 gB 00 54 50.794 +14 05 09.42           ~ 433 1
6 GRB 050908 gB 01 21 50.750 -12 57 17.20           ~ 159 1
7 GRB 050406 gB 02 17 52.200 -50 11 15.81     18.83     ~ 117 0
8 GRB 050603 gB 02 39 56.839 -25 10 54.92     18.48     ~ 149 0
9 GRB 050318 gB 03 18 51.000 -46 23 43.61 18.10 18.68 17.58     ~ 159 0
10 GRB 050822 gB 03 24 27.240 -46 01 59.20     20.82     ~ 96 0
11 NAME LMC G 05 23 34.6 -69 45 22     0.4     ~ 15063 1
12 GRB 050915A gB 05 26 44.804 -28 00 59.27           ~ 69 0
13 GRB 980329 gB 07 02 41 +38 50.7           ~ 264 1
14 GRB 050505 gB 09 27 03.300 +30 16 23.70     20.74     ~ 172 1
15 GRB 050502B gB 09 30 10.024 +16 59 48.07           ~ 150 0
16 GRB 020124 gB 09 32 50.8 -11 31 11           ~ 143 2
17 GRB 050319 gB 10 16 47.900 +43 32 53.80   18.02 17.01     ~ 235 1
18 GRB 030323 gB 11 06 09.4 -21 46 13           ~ 126 1
19 GRB 011211 gB 11 15 16 -21 56.0           ~ 287 1
20 GRB 050714B gB 11 18 47.610 -15 32 48.90           ~ 66 0
21 GRB 050412 gB 12 04 25.060 -01 12 03.60           ~ 77 0
22 GRB 030429 gB 12 13 07.495 -20 54 49.54           ~ 121 1
23 GRB 050416 gB 12 33 54.600 +21 03 26.69     19.12     ~ 253 1
24 NAME Hubble Deep Field reg 12 36 49.5 +62 12 58           ~ 1838 1
25 GRB 050726 gB 13 20 11.900 -32 03 51.89     17.58     ~ 61 0
26 GRB 050801 gB 13 36 35.000 -21 55 41.00 15.03 15.82 15.46     ~ 142 0
27 GRB 050730 gB 14 08 17.090 -03 46 18.90   20.32 17.68     ~ 284 1
28 GRB 050802 gB 14 37 05.820 +27 47 12.62 16.85 17.38 16.97     ~ 159 0
29 GRB 000301C gB 16 20 18.5 +29 26 35           ~ 341 2
30 GRB 050401 gB 16 31 28.84 +02 11 14.5           ~ 304 0
31 GRB 000926 gB 17 04 15 +51 46.0           ~ 342 2
32 GRB 050814 gB 17 36 45.390 +46 20 21.60           ~ 136 0
33 FS 141 * 17 48 58.9910389754 +23 17 43.494982485   13.29 12.51     G2 6 0
34 SN 2005nc SN* 18 32 32.560 +26 20 22.34           SNIc: 349 1
35 GRB 050315 gB 20 25 54.100 -42 36 02.19           ~ 194 0
36 GRB 050922C gB 21 09 33.000 -08 45 30.10 15.15 15.86 14.69     ~ 253 0
37 GRB 050820A gB 22 29 38.110 +19 33 37.10 18.33 19.00 18.47     ~ 340 1
38 GRB 050716 gB 22 34 20.730 +38 41 03.60   21.52 20.32     ~ 68 0
39 GRB 050803 gB 23 22 37.910 +05 47 09.00           ~ 105 0
40 GRB 050819 gB 23 55 01.650 +24 51 38.80           ~ 64 0

    Equat.    Gal    SGal    Ecl

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2020.12.02-11:27:03

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