GCN Circular 5763

Klotz, A. (CESR-OMP), Boer M. (OHP), Atteia J.L. (LATT-OMP) report:

We imaged the field of GRB 061028 detected by SWIFT
(trigger 235715) with the TAROT robotic telescope (D=25cm)
located at the Calern observatory, France.

The observations started 145.4s after the GRB trigger
(6.7s after the notice). The elevation of the field increased from
from 67 degrees above horizon and weather conditions
were good.

The date of trigger : t0 = 2006-10-28T01:26:22.272

The first image is trailed with a duration of 60.0s
(see the description in Klotz et al., 2006, A&A 451, L39).
We do not detect any OT with a limiting magnitude of:
t0+145.4s to t0+205.4s : R > 16.5

The second image is 30.0s exposure in tracking mode:
t0+212.1s to t0+242.1s : R > 17.5

We co-added a series of exposures:
t0+212.1s to t0+497.5s : R > 18.3

Magnitudes were estimated with the nearby USNO-B1 stars
and are not corrected for galactic dust extinction.

N.B. Galactic coordinates are lon=168.5115 lat=+15.6018
and the galactic extinction in R band is 0.4 magnitudes
estimated from D. Schlegel et al. 1998ApJ...500..525S.

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