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GCN Circular 17234

GRB 141225A: Redshift from OSIRIS at the 10.4m GTC
2014-12-26T03:08:38Z (9 years ago)
Javier Gorosabel at IAA-CSIC <>
J. Gorosabel (UPV-EHU, IAA-CSIC), A. de Ugarte Postigo (IAA-CSIC,
DARK/NBI), C.C. Thoene (IAA-CSIC),  N. Tanvir (U. Leicester), J.P.U. Fynbo
(DARK/NBI), D. Garc�a-Alvare (GTC), "A. Perez-Romero (GTC)
report on behalf of a larger collaboration:

We observed the afterglow of GRB 141225A (D'Avanzo et al. GCN 17229) with
OSIRIS at the 10.4m GTC. Observations began at 00:25:25 UT (~1.4 hours
post burst). Four 600s spectra were taken with the R1000B grism going from
3750 to 7800 AA. A first analisys based on archival arc lamps reveals
absorption features of FeII and MgII at a preliminary redshift of z=0.915.

[GCN OPS NOTE(27dec14): Pera author's request, D.G was changed to D.G-A
and A.P-R was added.]
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