TITLE:   GCN CIRCULAR
NUMBER:  3377
SUBJECT: GRB 050505: Keck I-band Magnitude
DATE:    05/05/07 23:02:43 GMT
FROM:    S. Bradley Cenko at Caltech  <cenko@srl.caltech.edu>

S. Bradley Cenko, Chuck Steidel, Naveen Reddy, and Derek B. Fox report on
behalf of the Caltech-NRAO-Carnegie GRB Collaboration:

We have further analyzed the I band images of the afterglow of GRB 050505
reported in GCN 3366.  Using the USNO-B1 star located at RA:
09:27:06.5667, Dec: +30:17:18.750 (I = 18.85) as a reference, we find the
following magnitude for the afterglow:

UT Time      UT Date     Time Since Burst (hr)      Magnitude
------------------------------------------------------------------------
5:45:47      May 6       6.4			    20.66 +/- 0.1