GRB 110106B: early optical and near-IR observations.

Gorosabel, J.; Castro-Tirado, A. J.; Jelinek, M.; Kubanek, P.; Visus, M.; Tata, R.; Sota, A.; Mottola, S.; Faber, C.
GRB Coordinates Network, Circular Service, 11552, 1 (2011)


"We have carried out VRIH-band observations of the GRB 110106B XRT error circle (Sbarufatti et al. GCN Circ. 11525) using the 0.6m BOOTES2, 1.23m CAHA, the 1.5m OSN, the 0.82m IAC80 and the 1.5m TCS telescopes, as follows:

  Telescope              Date Jan.2011        Post-GRB-time         Filter        Lim.Mag.
                                          (UT)                      (min)                              (3sigma)
  0.6m BOOTES2     6.90041-6.90212        10.3-12.8                R            16.5
  1.23m CAHA          6.90179-6.91123        12.3-25.9                R            20.4
  1.5m OSN              6.90258-6.91564        13.4-32.2                I             21.0
  1.23m CAHA          6.91184-6.96185        26.8-98.8                V            20.5
  IAC80                    6.91533-6.92520        31.8-46.0                R            20.3
  1.5m TCS               6.94378-6.96465       72.8-102.8              H            18.0

No optical object is detected coincident with the optical afterglow position (Levan et al. GCN Circ. 11534, Berger et al. GCN Circ. 11540) down to the limiting magnitudes (Vega system) displayed in the above table."