TITLE: GCN CIRCULAR NUMBER: 10630 SUBJECT: GRB 100418A: SMA submm detection DATE: 10/04/20 06:40:43 GMT FROM: Antonio Deugarte at IAA-CSIC S. Martin (ESO), G. Petitpas (SMA), A. de Ugarte Postigo (INAF-OAB), M. Gurwell (SMA), A.J. Castro-Tirado, J. Gorosabel (IAA-CSIC), D. Garcia-Apaadoo, C. de Breuck, A. Lundgren (ESO) report: "We have observed the field of GRB 100418A (Marshall et al., GCNC 10612) from SMA in the 345 GHz band starting on April 19th 13:00 UT. In a preliminary analysis of the data we detect a single source coincident with the position of the afterglow with a flux density of 20+/-2.4 mJy. Further observations of this very peculiar source are encouraged."