TITLE: GCN CIRCULAR NUMBER: 7078 SUBJECT: GRB 071112C: Optical observations at Crni Vrh DATE: 07/11/13 12:39:32 GMT FROM: Herman Mikuz at OCV B. Dintinjana, S. Maticic, H. Mikuz and J. Skvarc on behalf of PIKA observing program at Crni Vrh Observatory: We observed the afterglow of GRB 071112C (Perri et al., GCN 7059) with 60-cm Cichocki robotic telescope at Crni Vrh Observatory, Slovenia in rather poor seeing conditions. The series of nineteen 90 second connsecutive exposures with Rc filter started at 18:35:51UT, 118 seconds after the GCN notice time. We confirm optical afterglow found by UVOT. The object measured coordinates are RA=02:36:50.95, DEC=+28:22:16.8 (J2000). The object was clearly detected on first nine frames after which it dropped below the detection limit. Photometry results are given in table below. The magnitudes are derived using comparison stars from the USNO-B1 catalogue. The 3-sigma limiting magnitude in R filter is around magnitude 18.2. Time refers to exposure start. Time (UT) Exposure(s) Mag. Err. Filter 2007 Nov 12.77490 90 17.25 0.13 R 2007 Nov 12.77659 90 17.49 0.15 R 2007 Nov 12.77826 90 17.84 0.18 R 2007 Nov 12.77994 90 17.82 0.21 R 2007 Nov 12.78162 90 18.53 0.29 R 2007 Nov 12.78330 90 18.81 0.63 R 2007 Nov 12.78498 90 18.51 0.31 R 2007 Nov 12.78665 90 18.68 0.49 R 2007 Nov 12.78834 90 18.88 0.62 R