TITLE: GCN CIRCULAR NUMBER: 10649 SUBJECT: GRB 100414A: Radio Afterglow Detection with the Expanded VLA DATE: 10/04/22 17:44:55 GMT FROM: Poonam Chandra at Royal Mil. College Canada Poonam Chandra (RMC), Dale A. Frail (NRAO), S. Bradley Cenko (Berkeley) and Fiona Harrison (Caltech) report on behalf of a larger collaboration: We used the Expanded Very Large Array (EVLA) to observe the Fermi burst GRB 100414A (Takahashi et al, GCN 10594 Foley GCN 10595) on 2010 Apr 19 UT Within the revised XRT error circle (Goad et al GCN 10605). We detect the GRB afterglow with a flux density of 406 +/- 22 uJy. The EVLA is undergoing active commissioning and as such these results should be considered preliminary=2E Further observations are planned. The National Radio Astronomy Observatory is a facility of the National Science Foundation operated under cooperative agreement by Associated Universities Inc. [GCN OPS NOTE(22apr10): Per author's request, the "13A" in the Subject line was changed to "14A".]