GCN Circular 7052
Klotz, A. (CESR-OMP), Boer M. (OHP), Atteia J.L. (LATT-OMP) report: We imaged the field of GRB 071109 detected by INTEGRAL (trigger 4761) with the TAROT robotic telescope (D=25cm) located at the Calern observatory, France. The observations started 36s after the GRB trigger (8s after the notice). The elevation of the field decreased from from 12 degrees above horizon and weather conditions were good. We analyzed carefully the following zones: Mereghetti et al. 2007 (GCNC 7046): Center 19h19m39.12m +02�02'52.8" radius=2.5 arcmin Chandra & Frail 2007 (GCNC 7049): Center 19h19m51.67m +02�01'49.9" radius=15 arcsec Perri, Stratta et al. 2007 (GCNC 7050): Center 19h19m53.9m +02�02'47.5" radius=9 arcsec The first TAROT 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+36s to t0+96s : R > 15.4 The second image is 30.0s exposure in tracking mode: t0+103s to t0+133s : R > 15.5 Magnitudes were estimated with the nearby USNO-B1 stars and are not corrected for galactic dust extinction. N.B. Galactic coordinates are lon= 37.9724 lat= -5.3391 and the galactic extinction in R band is about 1.8 magnitudes estimated from D. Schlegel et al. 1998ApJ...500..525S. This message may be cited.