2009A&A...503..437D


C.D.S. - SIMBAD4 rel 1.7 - 2021.03.09CET10:14:01

2009A&A...503..437D - Astronomy and Astrophysics, volume 503, 437-444 (2009/8-4)

UVES/VLT high resolution absorption spectroscopy of the GRB 080330 afterglow: a study of the GRB host galaxy and intervening absorbers.

D'ELIA V., FIORE F., PERNA R., KRONGOLD Y., VERGANI S.D., CAMPANA S., COVINO S., D'AVANZO P., FUGAZZA D., GOLDONI P., GUIDORZI C., MEURS E.J.A., NORCI L., PIRANOMONTE S., TAGLIAFERRI G. and WARD P.

Abstract (from CDS):

We study the gamma-ray burst (GRB) environment and intervening absorbers by analyzing the optical absorption features produced by gas surrounding the GRB or along its line of sight. We analyzed high resolution spectroscopic observations (R=40000, S/N=3-6) of the optical afterglow of GRB 080330, taken with UVES at the VLT∼1.5h after the GRB trigger. The spectrum illustrates the complexity of the ISM of the GRB host galaxy at z=1.51 which has at least four components in the main absorption system. We detect strong FeII, SiII, and NiII excited absorption lines associated with the bluemost component only. In addition to the host galaxy, at least two more absorbers lying along the line of sight to the afterglow have been detected in the redshift range 0.8<z<1.1, each exhibiting MgII absorption. For the bluemost component in the host galaxy, we derive information about its distance from the site of the GRB explosion. We do so by assuming that the excited absorption lines are produced by indirect UV pumping, and compare the data with a time dependent photo-excitation code. The distance of this component is found to be ∼280+40–50pc, which is lower than found for other GRBs (1-6kpc). We identify two additional MgII absorbers, one of them with a rest frame equivalent width larger than 1Å. The distance between the GRB and the absorber measured in this paper confirms that the power of the GRB radiation can influence the conditions of the interstellar medium up to a distance of at least several hundred pc. For the intervening absorbers, we confirm the trend that on average one strong intervening system is found per afterglow, as has been noted in studies exhibiting an excess of strong MgII absorbers along GRB sightlines compared to quasars.

Abstract Copyright:

Journal keyword(s): gamma rays: bursts - cosmology: observations - galaxies: abundances - ISM: general

Nomenclature: [DFP2009] GRB 080330 Host G N=1.

Simbad objects: 9

goto Full paper

goto View the reference in ADS

Number of rows : 9

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           ~ 518 0
2 [DFP2009] GRB 080330 Host G G 11 17 04.50 +30 37 24.0           ~ 1 1
3 GRB 080330 gB 11 17 06.70 +30 36 24.1           ~ 121 0
4 GRB 050730 gB 14 08 17.090 -03 46 18.90   20.32 17.68     ~ 286 0
5 GRB 080319B gB 14 31 41.04 +36 18 09.2           ~ 424 0
6 GRB 060418 gB 15 45 42.600 -03 38 20.00 15.73 16.19 14.98     ~ 326 0
7 GRB 020813A gB 19 46 41.874 -19 36 04.81           ~ 287 0
8 GRB 050922C gB 21 09 33.000 -08 45 30.10 15.15 15.86 14.69     ~ 254 0
9 GRB 051111A gB 23 12 33.170 +18 22 28.80 19.77 20.08 19.50     ~ 188 0

    Equat.    Gal    SGal    Ecl

To bookmark this query, right click on this link: simbad:objects in 2009A&A...503..437D and select 'bookmark this link' or equivalent in the popup menu


2021.03.09-10:14:01

© Université de Strasbourg/CNRS

    • Contact