Skip to main content
Testing. You are viewing the public testing version of GCN. For the production version, go to https://gcn.nasa.gov.
New Announcement Feature, Code of Conduct, Circular Revisions. See news and announcements

GCN Circular 7650

Subject
GRB 080430: Spectroscopy from CAHA
Date
2008-05-01T02:51:20Z (16 years ago)
From
Antonio Deugarte at IAA-CSIC <deugarte@iaa.es>
A. de Ugarte Postigo, L. Christensen (ESO), J. Gorosabel (IAA-CSIC),
C. Th�ne (Dark), D.A. Kann (TLS), A. Mora (UAM), T. Szeifert (ESO),
M. Jelinek, A.J. Castro-Tirado (IAA-CSIC), S. Pedraz (CAHA),
N. Cardiel, D. Montes (UCM). On behalf of a larger collaboration report:

We have obtained spectroscopic observations of GRB 080430 from the 2.2m
Calar
Alto telescope (+CAFOS) starting at 21:11 UT (78 minutes after the
burst). The
observations consisted of 3x1200s integrations in low resolution. The
signal to noise
ratio is low but after a preliminary reduction we may conclude:

1) Continuum is clearly detected down to 3500 Angstroms, implying a
redshift smaller
than 1.9.
2) We detect an absorption feature at ~4900 Angstroms that we suggest to
be the
MgII doublet (2796.3, 2803.5), implying a most probable redshift of ~0.75.

Further analysis is ongoing. Additional spectroscopic observations are
encouraged.

This message may be cited.
Looking for U.S. government information and services? Visit USA.gov