GCN Circular 7819
Subject
GRB080604: HET redshift retraction
Date
2008-06-04T20:56:18Z (17 years ago)
From
Antonino Cucchiara at PSU <cucchiara@astro.psu.edu>
A. Cucchiara and D. B. Fox (Penn State) report:
Based on updated calibration files we re-analyzed the GRB080604 spectrum
taken at HET (GCN 7805). The features reported in the previous GCN are no
longer significant at a 3-sigma confidence level.
Furthermore, only an upper limit of z < 2.8 can be derived from our dataset.
Our revised results are consistent with the results from Gemini-North
spectroscopy
(Wiersama et al., GCN 7818). The low signal to noise of our spectrum
does not
permit detection of the absorption features associated with the z=1.416
system
seen in those data.