TITLE: GCN CIRCULAR NUMBER: 15174 SUBJECT: GRB 130831A: JCMT SCUBA-2 sub-mm observation DATE: 13/09/04 02:01:33 GMT FROM: Ian Smith at Rice U I.A. Smith (Rice U.), R.P.J. Tilanus (Leiden Observatory), N.R. Tanvir (U. of Leicester), D.A. Frail (NRAO) report: We observed the location of GRB 130831A (Hagen et al., GCN Circ. 15139) using the SCUBA-2 sub-millimeter continuum camera on the James Clerk Maxwell Telescope. The observation started at 14:13 UT on 2013-08-31, corresponding to 69 minutes after the burst trigger. Exposures totaling 2.0 hours were made in good weather conditions. No source was detected, with a preliminary RMS of 1.4 mJy/beam at 850 microns and 13.7 mJy/beam at 450 microns. We thank Callie McNew for the prompt support of these observations.