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 3366

GRB050505: Optical Afterglow Candidate
2005-05-06T07:25:58Z (19 years ago)
S. Bradley Cenko at Caltech <>
S. Bradley Cenko, Chuck Steidel, Naveen Reddy, and Derek B. Fox report
on behalf of the Caltech-NRAO-Carnegie GRB Collaboration:

We have imaged the field of GRB050505 (GCN 3360) with the Keck Low
Resolution Imaging Spectrometer (LRIS) mounted on the 10-m Keck I
Telescope.  Observations in imaging mode consisted of 2 x 300 s
simultaneous exposures in the g' and I filters.  The mean epoch of our
observations is approximately 5:45 UT 6 May 2005 (~ 6.1 hours after the

In the XRT error circle reported in GCN 3365, we find one bright source,
with coordinates (J2000.0):

	RA: 09:27:03.3
	Dec: +30:16:23.7

We tentatively identify this source as the afterglow of GRB050505.
Looking for U.S. government information and services? Visit