L.A. Antonelli, S. Covino, P. D'Avanzo, D. Fugazza, L. Calzoletti, S.
Campana, G. Chincarini, M.L. Conciatore, S. Cutini, V. D'Elia, F.
Dalessio, F. Fiore, P. Goldoni, D. Guetta, C. Guidorzi, G.L. Israel,
N. Masetti, A. Melandri, E. Meurs, L. Nicastro, E. Palazzi, E. Pian, S.
Piranomonte, L. Stella, G. Stratta, G. Tagliaferri, G. Tosti, V.
Testa, S.D. Vergani, F. Vitali report on behalf of the REM team:
The robotic 60-cm REM telescope located at La Silla (Chile) observed
the field of the GRB 071031 (Stroh et al., GCN 7020). Observations was
performed automatically in the both optical (R, I) and NIR (Z, J, H, K)
under poor seeing condition starting at 01:08:19 UT (about 46 sec
alert and 102 sec after the burst ) .
A preliminary analysis of the first set of R-band and H-band exposures
not reveal the optical afterglow candidate reported by Stroh et al.,
Kruehler et al. (GCN 7021) and Haislip et al. (GCN. 7022). We derive
following upper limits of R > 16.4 (calibrated against USNO B1catalog)
H > 13.8 (calibrated against the 2MASS catalog).
Futher analysis are in progress.