GCN Circular 16194
Subject
GRB 140430A: VLT/X-shooter redshift
Date
2014-05-01T00:54:33Z (10 years ago)
From
Daniele Malesani at Dark Cosmology Centre, Niels Bohr Inst <malesani@dark-cosmology.dk>
T. Kruehler (ESO Santiago), D. Malesani (DARK/NBI), A. de Ugarte Postigo
(IAA/CSIC and DARK/NBI), A. Melandri (INAF/OABr), J. P. U. Fynbo
(DARK/NBI), report on behalf of a larger collaboration:
We observed the optical afterglow of GRB 140430A (Siegel et al., GCN
16190) with the ESO VLT equipped with X-shooter. Observations started at
23:09 UT on 2014 April 30 (2.5 hr after the GRB), still in twilight, and
two 10-minute spectra were secured. The covered wavelength range is
3000-25000 AA.
We detect a clear continuum, and several absorption features, which we
interpret as due, among others, to Si II, C IV, Al II, Fe II, and Mg II
at a common redshift z = 1.60. In the infrared arm, we also detect the
[O III] 5008 nebular line in emission at the same redshift.
We acknowledge excellent support from the ESO staff at Paranal, in
particular Andrea Mehner, Rodrigo Romero, and Stephane Brillant.