TITLE: GCN GRB OBSERVATION REPORT NUMBER: 4157 SUBJECT: GRB 051022, mm counterpart DATE: 05/10/24 12:56:28 GMT FROM: Alberto Castro-Tirado at Inst.de Astro. de Andalucia M. Bremer (IRAM, Grenoble), A. J. Castro-Tirado (IAA-CSIC, Granada) and R. Neri (IRAM), on behalf of a large collaboration, report: "On Oct 23.9 UT we have undertaken millimetre observations (3 mm) with the Plateau de Bure Interferometer of source "B" (Castro-Tirado et al., GCNC 4143), related to the HETE-2 GRB 051022 (Olive et al., GCNC 4131). We found a ~1 mJy source (4 sigma) at coordinates: AR(2000) = 23:56:04.14 Dec(2000) = +19:36:25.4 The astrometrical error is 0.5" (1-sigma), consistent with the position of source B and the VLA radio counterpart detected on Oct 24.1 (Cameron et al. GCNC 4154). We will continue to monitor the source. " [GCN OPS NOTE(25oct05): The name on the 4131 reference was changed from Graziani to Olive (in response to the author change on 4131).]