Skip to main content
Testing. You are viewing the public testing version of GCN. For the production version, go to
Introducing Einstein Probe, Astro Flavored Markdown, and Notices Schema v4.0.0. See news and announcements

GCN Circular 14567

GRB 130505A - Gemini-N/GMOS redshift determination
2013-05-05T10:30:19Z (11 years ago)
Nial Tanvir at U.Leicester <>
N. R. Tanvir (U. Leicester), A. J. Levan (U. Warwick), T. Matulonis
and A. B. Smith (Gemini) report on behalf of a larger collaboration:

We observed the afterglow of GRB 130505A (Cannizzo et al. GCN 14563)
with the GMOS-N spectrograph on Gemini-N, beginning approximately 60 min
after the BAT trigger.

In our provisional reduction we detect numerous absorption lines, including
Lyman alpha, SiII/SiII*1260, SiII*1264, OI1302, SiII/OI*1304, SiII*1309,
CII/CII* 1334/1335, SiIV1394/1403, SiII 1527, SiII* 1533, CIV 1548/1551,
FeII 1608, AlII 1671 and AlIII 1855/1863 at a common redshift of z=2.27.

The presence of fine structure lines, in particular, confirms this to be the
redshift of this burst.
Looking for U.S. government information and services? Visit