TITLE: GCN CIRCULAR NUMBER: 6976 SUBJECT: GRB 071021: Subaru NIR observation DATE: 07/10/22 08:55:44 GMT FROM: Nobuyuki Kawai at Tokyo Tech H. Terada, T.-S. Pyo, K. Aoki, T. Hattori (Subaru Telescope/NAOJ) and N. Kawai (Tokyo Tech) report on behalf of the Subaru GRB team: "We observed the XRT error circle of GRB 071021 (GCNs 6963,6966) in the K, H, and J-bands using the IRCS instrument on the Subaru Telescope. We detected the afterglow candidate (Castro-Tirado et al. GCNs 6968, 6971, Malesani et al. GCN 6972) in the K-band image at approximately K~21 mag (midtime 2007-10-22 05:38 UTC). Further observations are in progress."