2010A&A...522A..20D


C.D.S. - SIMBAD4 rel 1.7 - 2020.12.03CET13:18:50

2010A&A...522A..20D - Astronomy and Astrophysics, volume 522, A20-20 (2010/11-1)

The afterglow and host galaxy of GRB 090205: evidence of a Ly-α emitter at z = 4.65.

D'AVANZO P., PERRI M., FUGAZZA D., SALVATERRA R., CHINCARINI G., MARGUTTI R., WU X.F., THOENE C.C., FERNANDEZ-SOTO A., UKWATTA T.N., BURROWS D.N., GEHRELS N., MESZAROS P., TOMA K., ZHANG B., COVINO S., CAMPANA S., D'ELIA V., DELLA VALLE M. and PIRANOMONTE S.

Abstract (from CDS):

Gamma-ray bursts (GRBs) have proven to be detectable to distances much larger than any other astrophysical object, providing the most effective way, complementing ordinary surveys of studying the high redshift universe. We present the results of an observational campaign devoted to the study of the high-z GRB090205. We carried out optical/NIR spectroscopy and imaging of GRB090205 with the ESO-VLT starting from hours after the event to several days later to detect the host galaxy. We compared the results obtained from our optical/NIR observations with the available Swift high-energy data of this burst. Our observational campaign led to the detection of the optical afterglow and host galaxy of GRB090205 and to the first measure of its redshift, z=4.65. As in other high-z GRBs, GRB090205 has a short duration in the rest frame with T90,rf=1.6s, which suggests that it might belong to the short GRB class. The X-ray afterglow of GRB090205 has a complex and interesting behavior with a possible rebrightening at 500-1000s from the trigger time and late flaring activity. Photometric observations of the GRB090205 host galaxy imply that it is a starburst galaxy with a stellar population younger than ∼150Myr. Moreover, the metallicity of Z>0.27Z derived from the GRB afterglow spectrum is among the highest derived from GRB afterglow measurement at high-z, suggesting that the burst occurred in a rather enriched environment. Finally, a detailed analysis of the afterglow spectrum shows the existence of a line corresponding to Lyman-α emission at the redshift of the burst. GRB090205 is thus hosted by a typical Lyman-α emitter (LAE) at z=4.65. This makes the host galaxy of GRB090205 the farthest GRB host galaxy, spectroscopically confirmed, detected to date.

Abstract Copyright:

Journal keyword(s): gamma rays: general

Nomenclature: [DPF2010] GRB 090205 Host G N=1.

Simbad objects: 13

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Number of rows : 13

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 021004 gB 00 26 54.68 +18 55 41.6           ~ 516 1
2 GRB 080913 gB 04 22 57.90 -25 07 38.6           ~ 175 0
3 GRB 090423 gB 09 55 33.19 +18 08 57.7           ~ 312 0
4 GRB 030323 gB 11 06 09.4 -21 46 13           ~ 126 1
5 GRB 011211 gB 11 15 16 -21 56.0           ~ 287 1
6 GRB 971214 gB 11 56 26.4 +65 12 01           ~ 434 1
7 GRB 030429 gB 12 13 07.495 -20 54 49.54           ~ 121 1
8 GRB 090426 gB 12 36 19.49 +32 59 05.5           ~ 163 0
9 [DPF2010] GRB 090205 Host G EmG 14 43 38.70 -27 51 10.0           ~ 1 0
10 GRB 090205 gB 14 43 40.00 -27 50 51.4           ~ 72 0
11 CD-38 10980 WD* 16 23 33.8384178546 -39 13 46.160032569 9.916 10.885 11.029 10.936 10.841 DA2 443 0
12 GRB 000926 gB 17 04 15 +51 46.0           ~ 342 2
13 GRB 090502 gB 17 51 -20.3           ~ 12 0

    Equat.    Gal    SGal    Ecl

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2020.12.03-13:18:50

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