GCN Circular 6284
Subject
GRB 070412: Optical observations at Crni Vrh
Date
2007-04-12T09:40:32Z (17 years ago)
From
Herman Mikuz at OCV <herman.mikuz@fmf.uni-lj.si>
H. Mikuz, J. Skvarc and B. Dintinjana on behalf of PIKA observing program at
Crni Vrh Observatory:
We observed a 42'x42' field centered on Swift position at ra=12:06:01
dec=+40:06:03 (J2000), using 60 cm Cichocki robotic telescope at Crni Vrh
Observatory, Slovenia. There is no obvious source down to R magnitude
20.7 +/-0.1 inside the error box 3x3 arc minutes on 90 s R filter
exposure, starting at 2007 Apr. 12 01:39:03 UT (46 seconds after reception
of the alert) and 5 subsequent images of the same duration. Magnitudes
were calibrated against the USNO-B1 catalogue. In particular we also do
not observe any source to this limiting magnitude at the coordinates
reported by NOT (Malesani and Uthars, GCN 6276) or Jelinek et al. (GCN
6279).