GCN Circular 3491
Autumn Homewood, Dieter H. Hartmann, Kiran Garimella (Clemson Univ.), Gary Henson (ETSU), Jeremy McLaughlin (Radford Univ.), Adam Brimeyer (Iowa State Univ.) report: We observed a 6x6 arcminute field centered on the optical afterglow of GRB 050525a (GCN 3466), identified by ROTSE-IIIc (GCN 3465) with the SARA 0.9 m Telescope at KPNO. Observations were carried out under good seeing conditions with the AP7 CCD. We obtained 35 300-second exposures each in the R-band, in 2 seperate groups. Observations of the first group (27 images) started at UT 2005/05/25 04:40:15, and ended 07:08:07. Observations of the second group (8 images) began at UT 10:51:29, and ended at 11:33:59. At the beginning of the first observation run we detect the afterglow at R = 18.9 +/- 0.2 mag, relative to USNO B2.0 R1. The SARA home page can be found at http://www.astro.fit.edu/sara/sara.html This message may be cited.