TITLE: GCN CIRCULAR NUMBER: 18645 SUBJECT: GRB 151127A: GROND K-band upper limit DATE: 15/11/27 13:01:13 GMT FROM: Jochen Greiner at MPI T. Schweyer and J. Greiner (both MPE Garching) report on behalf of the GROND team: We observed the field of GRB 151127A (Swift trigger 665268; D'Ai et al., GCN #18643) simultaneously in JHK with GROND (Greiner et al. 2008, PASP 120, 405) mounted at the 2.2 m MPG telescope at the ESO La Silla Observatory (Chile). Observations started at 09:12:30 UT on 2015-11-27, about 4 min after the GRB trigger. They were performed at an average seeing of 2" and at an average airmass of 2.3 during morning twilight, with the Sun at -6 deg. Due to the sky brightness, only the first two 1-min exposure K-band images are useful. We do not detect a source within the 2.6 arcsecond XRT error circle (D'Ai et al., GCN #18643), down to a limiting magnitude of K(AB) > 16.5 mag.