GCN Circular 15159
B. A. Zauderer, T. Laskar , and E. Berger (Harvard) report on behalf of the CARMA Key Project, "A Millimeter View of the Transient Universe" and a larger collaboration: "We observed the position of the optically bright GRB 130831A (Hagen et al. GCN 15139; Xu et al. GCN 15142) with the Combined Array for Research in Millimeter Astronomy (CARMA) beginning 2013 September 1.30 (dt = 0.76 d). At a mean frequency of 90 GHz, in marginal weather conditions, we obtain a 3-sigma upper limit of 0.78 mJy. We thank the CARMA observers and staff for their support."