[vsnet-grb-info 15016] GRB 140512A: Redshift from NOT

[GCN Circulars]

TITLE:   GCN CIRCULAR
NUMBER:  16310
SUBJECT: GRB 140512A: Redshift from NOT
DATE:    14/05/19 21:17:34 GMT
FROM:    Antonio de Ugarte Postigo at IAA-CSIC  <deugarte at iaa.es>

A. de Ugarte Postigo (IAA-CSIC, DARK/NBI), J. Gorosabel (IAA-CSIC,UPV-EHU),
D. Xu (DARK/NBI), D. Malesani (DARK/NBI), G. Leloudas (DARK/NBI),P.
Jakobsson (U. Iceland), T. Kruehler (ESO), A.A. Djupvik (NOT), E. Gafton
(OKC, Stockholm Univ.) and T. Libbrecht (Stockholm Univ.) report on behalf
of a larger collaboration:


Following the photometric observations of the counterpart of GRB 140512A
(Pagani et al. GCN 16249) from the 2.5 m NOT (+ALFOSC) reported by de
Ugarte Postigo et al. (GCN 16253) we obtained spectroscopic data.
Observations consisted in 2x1800s exposures using Grism #4, which covers
the range from 3800 to 9100. The mean observing epoch was May 13, 3:18:50
UT (7.78 hrs after the burst).


The spectrum presents absorption features consistent with FeII and MgII at
a common redshift of z=0.725, which we consider the most probable redshift
for this event.