TITLE: GCN CIRCULAR NUMBER: 11259 SUBJECT: GRB100906A: detection at 15GHz DATE: 10/09/09 10:16:04 GMT FROM: Guy Pooley at MRAO, Cambridge, UK The AMI Large Array (Cambridge, UK) was used to make two further observations of the field of GRB 100906A (Markwardt et al, GCN11227) in the band 13.5 to 17.2 GHz (GCN11250 reports the first observation). date/time flux sigma / microJy 2010 Sep 08 06h51m to Sep 08 07h51m 137 140 2010 Sep 08 22h03m to Sep 09 00h18m 465 70 The GRB is clearly detected in the second of these observations, mean time 57h17m after the trigger. (A radio source catalogued in NVSS, 87GB, 7C is also visible in the field near 01 55 11 +55 35 20 (J2000), about 4.5 arcmin from the GRB.) This message is quotable in publications. Guy Pooley, on behalf of the AMI collaboration