GCN Circular 17710
Subject
GRB 150413A: Refined redshift
Event
Date
2015-04-16T20:59:00Z (11 years ago)
From
Antonio de Ugarte Postigo at IAA-CSIC <deugarte@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-Ram�rez (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.