TITLE: GCN CIRCULAR NUMBER: 12840 SUBJECT: GRB 120116A: Optical observations at Crni Vrh DATE: 12/01/16 23:33:02 GMT FROM: Bojan Dintinjana at OCV S. Maticic, B. Dintinjana and H. Mikuz on behalf of PIKA observing program at Crni Vrh Observatory. We observed the field of GRB 120116A (GCN 12834) from Crni Vrh Observatory with a 60 cm robotic telescope, R filter and CCD. Twenty consecutive exposures of 60 second duration were taken. First exposure started at 2012-01-16 18:07:47 UT, 79 seconds after the burst (60 seconds after the SWIFT trigger). No optical candidate was detected within the uncertainty radius on single exposures, having R limiting magnitude 20.0 +/-0.2. Also we found no optical candidate on 20 sumed R images with total exposure of 1200 seconds and limiting R band magnitude 22.0 +/-0.2 (all magnitudes calibrated against the nearby USNO B1.0 R2 magnitude stars).