2003A&A...409L...5V

Query : 2003A&A...409L...5V

2003A&A...409L...5V - Astronomy and Astrophysics, volume 409L5-8 (2003/10-2)

New search strategy for high z intervening absorbers: GRB021004, a pilot study.

VREESWIJK P.M., MOLLER P. and FYNBO J.P.U.

Abstract (from CDS):

We present near-infrared narrow- and broad-band imaging of the field of GRB021004, performed with ISAAC on the UT1 of the ESO Very Large Telescope. The narrow-band filters were chosen to match prominent emission lines at the redshift of the absorption-line systems found against the early-time afterglow of GRB021004: [OIII] at z=1.38 and Hα at z=1.60, respectively. For the z=1.38 system we find an emission-line source at an impact parameter of 16'', which is somewhat larger than the typical impact parameters of a sample of MgII absorbers at redshifts around unity. Assuming that this tentative redshift-identification is correct, the star formation rate of the galaxy is 13±2M☉/yr. Our study reaches star-formation rate limits (5σ) of 5.7M☉/yr at z=1.38, and 7.7M☉/yr at z=1.60. These limits correspond to a depth of roughly 0.13L*. Any galaxy counterpart of the absorbers nearer to the line of sight either has to be fainter than this limit or not be an emission-line source.

Abstract Copyright: ∼

Journal keyword(s): gamma rays: bursts - galaxies: distances and redshifts - quasars: absorption lines

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 021004 gB 00 26 54.68 +18 55 41.6           ~ 560 0

Query : 2003A&A...409L...5V

Basic data :
GRB 021004 -- Gamma-ray Burst
Other object types: otypes_help 		gB (GRB,XRF)
ICRS coord. (ep=J2000) : 		00 26 54.68 +18 55 41.6 [ ] D 2002GCN..1583....1H
FK4 coord. (ep=B1950 eq=1950) : 		00 24 18.38 +18 39 05.7 [ ]
Gal coord. (ep=J2000) : 		114.91694 -43.56150 [ ]
Radial velocity / Redshift / cz : 		V(km/s) 250143 [~] / z(spectroscopic) 2.3281 [~] / cz 697947 [~]
   (Opt) C 2019ApJ...884...66G
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Identifiers (3) :
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GRB 021004 HETE Trigger 2380 XRF 021004

References (560 between 1850 and 2026) (Total 560)
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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