TITLE: GCN CIRCULAR NUMBER: 15526 SUBJECT: GRB 131127A: AROMA-N Optical Observation DATE: 13/11/28 11:36:56 GMT FROM: Takanori Sakamoto at AGU D. Kawamura, T. Sakamoto, I. Takahashi, S. Sugai, A. Yoshida (AGU) We observed the field of GRB 131127A detected by Swift (trigger #579571; Markwardt et al., GCN Circ. 15516) with the 12-inch AGU Robotic Optical Monitor for Astrophysical object - Narrow (AROMA-N) located at the Sagamihara campus of Aoyama Gakuin University. 60 images of 60 sec exposures were taken in the R filter starting from November 27 10:42:18 (UT) about 30 minutes after the trigger and stopped on November 27 11:48:15 (UT). We do not detect the optical afterglow both in the individual images and the stacked image, which combined 57 good quality images, inside the enhanced XRT position (Evans, et al., GCN #15520). The estimated five sigma upper limit of the combined image (total exposure of 3420 sec) is ~16.6 mag using the USNO-B1 catalog. [GCN OPS NOTE(29nov13): Per author's request, the "November 11" date was changed to "November 27" in two places.]