GCN Circular 17560
Subject
GRB150309A: Optical observations at Crni Vrh
Date
2015-03-10T14:27:29Z (9 years ago)
From
Herman Mikuz at OCV <herman.mikuz@fmf.uni-lj.si>
B. Dintinjana, S. Maticic and H. Mikuz on behalf of PIKA observing
program at Crni
Vrh Observatory.
We observed the field of GRB 150309A (Cummings et al., GCN 17553) from
Crni Vrh Observatory with a 60 cm robotic telescope and clear filter.
Twenty six consecutive exposures of 60 second duration were taken in
moonlight conditions. First exposure started at 2015-03-09 23:05:34 UT,
68 seconds after the SWIFT trigger.
No optical candidate was detected within the uncertainty radius on
single exposures, having limiting magnitude 19.2, calibrated against the
nerby USNO-B R2 magnitude stars. Also we found no optical candidate on
26 sumed unfiltered images with total exposure of 1560 seconds and
limiting magnitude 20.8 (calibrated against the nerby USNO-B R2
magnitude stars).