GCN Circular 5788
Klotz, A. (CESR-OMP), Boer M. (OHP), Atteia J.L. (LATT-OMP) report: We imaged the field of GRB 061027 detected by SWIFT (trigger 235645) with the TAROT robotic telescope (D=25cm) located at the European Southern Observatory, La Silla observatory, Chile. This trigger was long, had no high-energy emission, it was detected by "image trigger" (Stamatikos et al. GCNC 5760) and UVOT limiting mag. is V=20.4 until two hours after the burst. This is a good high-redshift candidate, so we shot a series of filtered R and I exposures centered on the BAT refined position (Parsons et al. GCNC 5761). The observations started 14.0h after the GRB trigger. The elevation of the field decreased from from 33 degrees above horizon and weather conditions were excellent. We obtained a second set of exposures on 2006 nov. 7 for comparison and to extract fading sources. The date of trigger : t0 = 2006-10-27T10:15:02.304 We co-added series of filtered exposures, and we do not detect any OT: t0+14.0h to t0+18.6h : R > 20.0 and I > 18.9 Magnitudes were estimated with the nearby USNO-B1 stars and are not corrected for galactic dust extinction. N.B. Galactic coordinates are lon=311.3409 lat=-25.2566 and the galactic extinction in R band is 0.1 magnitudes estimated from D. Schlegel et al. 1998ApJ...500..525S. This message may be cited.