2007MNRAS.380..757N

Query : 2007MNRAS.380..757N

2007MNRAS.380..757N - Mon. Not. R. Astron. Soc., 380, 757-762 (2007/September-2)

An observational limit on the earliest gamma-ray bursts.

NAOZ S. and BROMBERG O.

Abstract (from CDS):

We predict the redshift of the first observable (i.e. in our past light cone) gamma-ray burst (GRB) and calculate the GRB rate redshift distribution of the Population III stars at very early times (z = 20-60). Using the last two year of data from Swift, we place an upper limit on the efficiency (ηGRB) of GRB production per solar mass from the first generation of stars. We find that the first observable GRB is most likely to have formed at redshift 60. The observed rate of extremely high redshift GRBs (XRGs) is a subset of a group of 15 long GRBs per year, with no associated redshift and no optical afterglow counterparts, detected by Swift. Taking this maximal rate, we get that ηGRB<1.1x10–3 GRBs per solar mass in stars. A more realistic evaluation, for example, taking a subgroup of 5 per cent of the total sample of Swift gives an upper limit of ηGRB <3.2x10–4 GRBs per solar mass.

Abstract Copyright: 2007 The Authors. Journal compilation © 2007 RAS

Journal keyword(s): galaxies: high-redshift - cosmology: theory - gamma-rays: bursts

Simbad objects: 1

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Number of rows : 1
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 971214 gB 11 56 26.4 +65 12 01           ~ 445 1

Query : 2007MNRAS.380..757N

Basic data :
GRB 971214 -- Gamma-ray Burst
Other object types: otypes_help 		gB (GRB,Trigger,...)
ICRS coord. (ep=J2000) : 		11 56 26.4 +65 12 01 [ ] D 2012ApJ...746..156C
FK4 coord. (ep=B1950 eq=1950) : 		11 53 49.6 +65 28 43 [ ]
Gal coord. (ep=J2000) : 		132.0358 +50.9448 [ ]
Radial velocity / Redshift / cz : 		V(km/s) 270571 [~] / z(~) 3.4180 [~] / cz 1024691 [~]
   D 2005ApJ...634.1155X
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Identifiers (4) :
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GRB 971214 Trigger 6533 XRF 971214 [STK2001] 10796c

References (445 between 1850 and 2026) (Total 445)
Simbad bibliographic survey began in 1850 for stars (at least bright stars) and in 1983 for all other objects (outside the solar system).
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