TITLE: GCN CIRCULAR NUMBER: 14083 SUBJECT: GRB 121212A: PdBI mm observations DATE: 12/12/14 08:43:04 GMT FROM: Alberto Castro-Tirado at Inst.de Astro. de Andalucia A. J. Castro-Tirado (IAA-CSIC Granada), M. Bremer and J.-M. Winters (IRAM Grenoble), on behalf of a larger collaboration, report: "We conducted mm observations towards GRB 121212A (Grupe et al. GCNC 14064, Mereghetti et al. GCNC 14065) starting at 10.5 hr post burst with the PdBI at 90 GHz. At the position of the X-ray/optical afterglows (Beardmore et al. GCNC 14066, Kuin et al. GCNC 14069), no emission is detected down to 0.3 mJy (3 sigma limit)." This message can be quoted.