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 215

Subject
GRB990123, optical observation
Date
1999-01-25T01:50:49Z (25 years ago)
From
Peter Garnavich at CfA <peterg@cfa.harvard.edu>
P. Garnavich, S. Jha, K. Stanek and M. Garcia (Center for Astrophysics)
report "an R-band image of the GRB990123 field was obtained with the
Fred L. Whipple Observatory 1.2m telescope and CCD camera on Jan 24.547 UT.
The Optical Tranisent (plus host galaxy) are easily visible and comparison
with star-3 of GCN Circular 204 (R=18.5) gives an R magnitude of 20.4
for the OT+galaxy.  This is consistent with the continuing t**(-1.5)
decline shown by Bloom et al. (GCN 208)."


This message is quotable in publications.


[GCN OP NOTE:  This circular was actually received at 17:59:03 UT, but was
delayed in distribution due to the submitter not having prior vetting.]
Looking for U.S. government information and services? Visit USA.gov