TITLE: GCN CIRCULAR NUMBER: 6144 SUBJECT: GRB 070224: SARA upper limit DATE: 07/02/25 07:49:49 GMT FROM: Adria C. Updike at Clemson U A. C. Updike, H. A. Eid, D. H. Hartmann (Clemson University), T. H. Robertson, T. M. Jordan (Ball State University), and D. A. Kann (TLS) report on behalf of the Clemson GRB Follow-Up Team: The .9m SARA telescope began imaging the field of GRB 070224 approximately 9 hours after the Swift Trigger 261880 at 20:29:12 UT. Our observations were comprised of 180-second exposures in the R band. After stacking 2 hours worth of exposures, we do not detect any new sources down to a limiting magnitude of R ~ 21.4 +/- 0.4 mag (based on calibration to 10 field sources from USNO B1.0 R2 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.