[vsnet-grb-info 16429] GRB 150413A: Refined redshift
GCN Circulars
gcncirc at capella2.gsfc.nasa.gov
Fri Apr 17 05:59:08 JST 2015
TITLE: GCN CIRCULAR
NUMBER: 17710
SUBJECT: GRB 150413A: Refined redshift
DATE: 15/04/16 20:59:00 GMT
FROM: Antonio de Ugarte Postigo at IAA-CSIC <deugarte at iaa.es>
A. de Ugarte Postigo (IAA-CSIC, DARK/NBI) and L. Tomasella (INAF-OAPd)
report:
We have reanalysed the spectra of the afterglow of GRB 150413A (Markwardt
et al. GCN 17688, Ivanov et al. GCN 17689) obtained by the Asiago Transient
Classification Program (Tomasella et al. 2014, AN, 335, 841) with the Asiago
1.82 m Copernico Telescope +AFOSC (Tomasella et al. ATel 7391). In addition
to the Ly-alpha feature already reported, we identify absorption features of SiII,
SiII*, CII, SiIV, CIV, FeII and AlII at a common redshift of 3.139+/-0.003, slightly
lower than previously reported by Sanchez-Ramírez (GCN 17697) and by
Tomasella et al. (ATel 7391). In addition we report a tentative detection of a MgII
intervening absorber at z=0.950+/-0.003.
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