2010A&A...513A..42D


C.D.S. - SIMBAD4 rel 1.7 - 2020.07.14CEST21:25:01

2010A&A...513A..42D - Astronomy and Astrophysics, volume 513, A42-42 (2010/4-1)

GRB 090313: X-shooter's first shot at a gamma-ray burst.

DE UGARTE POSTIGO A., GOLDONI P., THOENE C.C., VERGANI S.D., D'ELIA V., PIRANOMONTE S., MALESANI D., COVINO S., FLORES H., FYNBO J.P.U., HJORTH J., WIJERS R.A.M.J., D'ODORICO S., HAMMER F., KAPER L., KJAERGAARD P., RANDICH S., ANDERSEN M.I., ANTONELLI L.A., CHRISTENSEN L., D'AVANZO P., FIORE F., GROOT P.J., MAIORANO E., PALAZZI E., PIAN E., TAGLIAFERRI G., VAN DEN ANCKER M.E. and VERNET J.

Abstract (from CDS):

X-shooter is the first second-generation instrument to become operative at the ESO Very Large Telescope (VLT). It is a broad-band medium-resolution spectrograph designed with gamma-ray burst (GRB) afterglow spectroscopy as one of its main science drivers. During the first commissioning night on sky with the instrument fully assembled, X-shooter observed the afterglow of GRB090313 as a demonstration of the instrument's capabilities. GRB090313 was observed almost two days after the burst onset, when the object had already faded to R∼21.6. Furthermore, the 90% illuminated Moon was just 30 degrees away from the field. In spite of the adverse conditions, we obtained a spectrum that, for the first time in GRB research, simultaneously covers the range from 5700 to 23000Å. The spectrum shows multiple absorption features at a redshift of 3.3736, which we identify as the redshift of the GRB. These features are composed of 3 components with different ionisation levels and velocities. Some of the features have never been observed before in a GRB at such a high redshift. Furthermore, we detect two intervening systems at redshifts of 1.8005 and 1.9597. These results demonstrate the potential of X-shooter in the GRB field, because it was capable of observing a GRB down to a magnitude limit that would include 72% of long GRB afterglows 2h after the burst onset. Coupled with the rapid response mode available at VLT, allowing reaction times of just a few minutes, X-shooter constitutes an significant leap forward on medium resolution spectroscopic studies of GRBs, their host galaxies and intervening systems, probing the early history of the Universe.

Abstract Copyright:

Journal keyword(s): gamma-ray burst: general - instrumentation: spectrographs

CDS comments: Fig. 1: G1 = [B2009] J131335.29+080538.54 and G2 = [B2009] J131336.08+080551.06 in Simbad.

Simbad objects: 6

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Number of rows : 6

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 NAME SMC G 00 52 38.0 -72 48 01   2.79 2.2     ~ 9446 1
2 GRB 090423 gB 09 55 33.19 +18 08 57.7           ~ 309 0
3 SN 2003dh SN* 10 44 50.030 +21 31 18.15     16.2     SNIcpec 1117 2
4 2MASX J13133527+0805390 G 13 13 35.289 +08 05 38.55           ~ 7 0
5 GRB 090313 gB 13 13 36.00 +08 05 10.7           ~ 116 0
6 SDSS J131336.07+080551.0 G 13 13 36.078 +08 05 51.06           ~ 2 0

    Equat.    Gal    SGal    Ecl

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2020.07.14-21:25:01

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