2006A&A...447..145V


C.D.S. - SIMBAD4 rel 1.7 - 2020.02.24CET09:39:44

2006A&A...447..145V - Astronomy and Astrophysics, volume 447, 145-156 (2006/2-3)

Low-resolution VLT spectroscopy of GRBs 991216, 011211 and 021211.

VREESWIJK P.M., SMETTE A., FRUCHTER A.S., PALAZZI E., ROL E., WIJERS R.A.M.J., KOUVELIOTOU C., KAPER L., PIAN E., MASETTI N., FRONTERA F., HJORTH J., GOROSABEL J., PIRO L., FYNBO J.P.U., JAKOBSSON P., WATSON D., O'BRIEN P.T. and LEDOUX C.

Abstract (from CDS):

We present low-resolution VLT spectroscopy of the afterglow of the gamma-ray bursts (GRBs) 991216, 011211 and 021211. Our spectrum of is the only optical spectrum for this afterglow. It shows two probable absorption systems at z=0.80 and z=1.02, where the highest redshift most likely reflects the distance to the host galaxy. A third system may be detected at z=0.77. HST imaging of the field, obtained 4 months after the burst, has resulted in the detection of two amorphous regions of emission, one at the projected afterglow position, and the other 0.6" away. The spectrum shows a depression in flux in between 4000Å and 5500Å. This could be the result of a 2175Å-type extinction feature in the host of GRB 991216, but at a rather red wavelength of 2360Å. If this interpretation is correct, it is the first time the extinction feature is seen in a GRB afterglow spectrum. It is centered at a wavelength similar to that of the ultra-violet (UV) bumps inferred from observations of a few UV-strong, hydrogen-poor stars in the Galaxy. All significant absorption lines (except for one) detected in the spectrum of GRB 991216 are identified with lines originating in a single absorption system at z=2.142±0.002, the redshift of the GRB 011211 host galaxy. We also detect the Lyα absorption line in the host, to which we fit a neutral hydrogen column density of logN(HI)=20.4±0.2, which indicates that it is a damped Lyα system. Using a curve-of-growth analysis, we estimate the Si, Fe and Al metallicity at the redshift to be [Si/H]=-0.9+0.6–0.4, [Fe/H]=-1.3±0.3, and [Al/H]=-1.0+0.5–0.3. For GRB 021211, we detect a single emission line in a spectrum obtained tens of days after the burst, which we identify as [OII]l3727 at z=1.006. The corresponding unobscured [OII] star-formation rate is 1.4M/yr.

Abstract Copyright:

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

Simbad objects: 25

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Number of rows : 25

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2020
#notes
1 ACO 30 ClG 00 26 44 -12 11.4           ~ 12 1
2 GRB 021004 gB 00 26 54.68 +18 55 41.6           ~ 511 1
3 NAME SMC G 00 52 38.0 -72 48 01   2.79 2.2     ~ 9230 1
4 GRB 050904 gB 00 54 50.794 +14 05 09.42           ~ 427 1
5 NAME Magellanic Clouds GrG 03 00 -71.0           ~ 5498 1
6 GRB 991216 gB 05 09 31.2983 +11 17 07.262           ~ 403 1
7 [VRH99] GRB 991216 abs 0.80 ALS 05 09 31.30 +11 17 07.3           ~ 3 0
8 [VRH99] GRB 991216 abs 0.77 ALS 05 09 31.30 +11 17 07.3           ~ 3 0
9 [VRH99] GRB 991216 abs 1.02 G 05 09 31.30 +11 17 07.3           ~ 5 1
10 NAME LMC G 05 23 34.6 -69 45 22     0.4     ~ 14544 1
11 HD 49798 HXB 06 48 04.7000758397 -44 18 58.432035331 6.758 8.017 8.287 8.391 8.543 sdO6 277 0
12 Anon J080859+0643 G 08 08 59.0 +06 43 37           ~ 3 1
13 SN 2002lt SN* 08 08 59.858 +06 43 37.52           SN.Ic:(~) 335 1
14 [DBM2003] nearby G G 08 08 59.867 +06 43 32.24           ~ 4 0
15 CD-32 5613 WD* 08 41 32.4293043356 -32 56 32.916852010   12.07 11.85 12.3   DA5.5 258 0
16 GRB 980613 gB 10 17 57.8 +71 27 26           ~ 197 1
17 SN 2003dh SN* 10 44 50.030 +21 31 18.15     16.2     SN.IcPec 1103 2
18 GRB 011211 gB 11 15 16 -21 56.0           ~ 284 1
19 [FJM2003] S1211-6 G 11 15 17.98 -21 56 56.2           ~ 16 1
20 GRB 990510 gB 13 38 07.64 -80 29 48.8           ~ 463 1
21 GRB 990123 gB 15 25 29 +44 45.0     8.95     ~ 959 1
22 GRB 000926 gB 17 04 15 +51 46.0           ~ 340 2
23 SN 1998bw SN* 19 35 03.17 -52 50 46.1   14.09       SNIc 1628 2
24 V* HM Aqr pA* 22 35 27.5256072315 -17 15 26.885199823 9.31 9.08 8.90     A0III 99 0
25 GRB 980703 gB 23 59 06.7 +08 35 07           ~ 417 1

    Equat.    Gal    SGal    Ecl

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2020.02.24-09:39:44

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