GCN Circular 7035
Klotz, A. (CESR-OMP), Boer M. (OHP), Atteia J.L. (LATT-OMP) report: We imaged the field of GRB 071101 detected by SWIFT (trigger 295779) with the TAROT robotic telescope (D=25cm) located at the Calern observatory, France. The observations started 39.4s after the GRB trigger (7.1s after the notice). The elevation of the field increased from from 36 degrees above horizon and weather conditions were good. Images were acquired with no filter. The date of trigger : t0 = 2007-11-01T17:53:46.752 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 at the XRT location defined by Pagani et al. GCN Circ. 7034) with a limiting magnitude of: t0+39.4s to t0+99.4s : R > 16.3 The second image is 30.0s exposure in tracking mode: t0+106.4s to t0+136.4s : R > 17.5 We co-added a series of exposures: t0+106.4s to t0+393.6s : R > 18.4 Magnitudes were estimated with the nearby USNO-B1 stars and are not corrected for galactic dust extinction. N.B. Galactic coordinates are lon=138.4726 lat= +3.9459 and the galactic extinction in R band is about 4.0 magnitudes estimated from D. Schlegel et al. 1998ApJ...500..525S. This message may be cited.