[vsnet-grb-info 15947] GRB 141225A: Redshift from OSIRIS at the 10.4m GTC
GCN Circulars
gcncirc at capella2.gsfc.nasa.gov
Fri Dec 26 12:08:45 JST 2014
TITLE: GCN CIRCULAR
NUMBER: 17234
SUBJECT: GRB 141225A: Redshift from OSIRIS at the 10.4m GTC
DATE: 14/12/26 03:08:38 GMT
FROM: Javier Gorosabel at IAA-CSIC <jgu at iaa.es>
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. García (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.
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