GCN Circular 15602
Klotz A., Turpin D. (IRAP-CNRS-OMP), Gendre B., Boer M., Siellez K., Dereli H., Bardho O. (UNS-CNRS-OCA), Atteia J.L. (IRAP-CNRS-OMP) report: We imaged the field of GRB 131218A detected by INTEGRAL (trigger 6409) with the TAROT robotic telescope (D=25cm) located at the European Southern Observatory, La Silla observatory, Chile. The observations started 3.41h after the GRB trigger which occured during day. The elevation of the field increased from 26 degrees above horizon and weather conditions were good. We co-added a series of exposures but we do not detect any OT with a limiting magnitude of: t0+3.41h to t0+4.98h : Rlim = 19.6 Magnitudes were estimated with the nearby NOMAD1 stars and are not corrected for galactic dust extinction. N.B. Galactic coordinates are lon=276.4490 lat=-19.8751 and the galactic extinction in R band is about 0.4 magnitudes estimated from D. Schlegel et al. 1998ApJ...500..525S. This message may be cited.