TITLE: GCN CIRCULAR NUMBER: 10748 SUBJECT: GRB 100513A: SARA-N Upper Limit DATE: 10/05/13 05:26:18 GMT FROM: Adria C. Updike at Clemson U Adria C. Updike, Dieter H. Hartmann (Clemson University) and Tomomi Otani (FIT) report: We observed the field of GRB 100513A (Baumgartner et al., GCN 10746) beginning 1 hour and 55 minutes after the burst with the SARA-North 0.9m telescope located at KPNO. We do not detect the afterglow candidate (Morgan et al., 10747) in 4 minutes of stacked exposures in each of the R and I bands to a limiting magnitude of 19.5 in R and 19 in I (as compared to the USNO B1.0 catalog).