GCN Circular 11492
D. Xu (Weizmann Inst.), Ilya Ilyin (AIP), J.P.U. Fynbo (DARK/NBI) report on a larger collaboration: We observed the field of GRB 101224A (Krimm et al., GCN 11484; Pagani & Krimm, GCN 11488) at the Nordic Optical Telescope (NOT) equipped with StanCam. We obtained 5x300 s R-band images with a median time 20:53:06.8 UT (i.e., 15.4316 hr after the BAT trigger). The lowest airmass for these five images is 4.0 because the altitude was already ~13 degrees when observations started. The object shown in the pre-event image (Nugent & Bloom, GCN 11491) is clearly detected in our stacked image at the same position. The object is extended along the North-South axis to a considerable extent. We found R~21.5 mag against nearby two USNO B1 stars. This magnitude is a bit larger than the measurement from the pre-event image, and we caution that our images were obtained at high airmass and bias and flatfield frames are not available yet.