TITLE: GCN CIRCULAR NUMBER: 5769 SUBJECT: GRB 061028: SARA upper limit DATE: 06/10/28 21:24:49 GMT FROM: Adria C. Updike at Clemson U A. C. Updike and D. H. Hartmann (Clemson University) report on behalf of the Clemson GRB Follow-Up Team: The .9m SARA telescope began imaging the field of GRB 061028 4 hours and 51 minutes after the Swift Trigger 235715 at 01:26:22 UT. Our initial observations were comprised of 180-second exposures in the I band. After stacking in sets of 5, we did not detect any new sources. Our observations continued with 300-second exposures in the I band, 6 hours and 6 minutes after the trigger. Based on a total of 25 minutes of stacked I-band exposures we conclude that the XRT error circle (GCN 5762) does not contain a new or fading source to a limiting magnitude of I ~ 20.1 ± .4 mag (based on calibration of 10 field sources from USNO B1.0 I2 band). The Clemson University GRB Response Site may be found at: http://people.clemson.edu/~kgarime/burst/index.php The SARA Homepage can be found at: http://saraobservatory.org This message may be cited.