TITLE: GCN CIRCULAR NUMBER: 15264 SUBJECT: GRB 130925A: sub-mm non-detection with SMA DATE: 13/09/27 10:47:02 GMT FROM: Ashley Zauderer at CfA A. Zauderer, E. Berger (Harvard), and G. Petitpas (SMA) report on behalf of a larger collaboration: "We observed the position of GRB 130925A (Lien et al., GCN 15246) beginning 2013 Sep 26.31 UT (dt = 1.1 d) with the SMA at a mean frequency of 230 GHz. We find no significant radio emission at the position of the enhanced Swift-XRT position (Evans et al., GCN 15250) to a 3-sigma limit of 1.89 mJy. Observations are ongoing. We thank the SMA staff for prompt execution of these observations."