TITLE: GCN CIRCULAR NUMBER: 19606 SUBJECT: GRB 160625B: VLA Detection DATE: 16/06/27 20:43:24 GMT FROM: Kate Alexander at Harvard K. D. Alexander (Harvard), T. Laskar (NRAO / UC Berkeley), W. Fong (University of Arizona) and E. Berger (Harvard) report on behalf of a larger collaboration: We observed the Fermi/LAT GRB 160625B (Diririsa et al., GCN 19580) at multiple frequencies with the Karl G. Jansky Very Large Array (VLA) beginning 2016 June 27.28 UT (1.34 days after the burst). At a mean frequency of 9.8 GHz, we detect a radio source with a preliminary flux density of ~400 uJy at RA (J2000) = 20:34:23.507 +/- 0.003 Dec (J2000) = +06:55:07.89 +/- 0.03 consistent with the position of the optical afterglow (Troja et al., GCN 19588; Oates et al., GCN 19589) and the Swift/XRT position (Melandri et al., GCN 19585). Follow-up observations are planned. We thank the VLA staff for rapidly executing these observations.