[vsnet-grb-info 10102] GRB 110106B: early optical and near-IR observations

[GCN Circulars]

TITLE:   GCN CIRCULAR
NUMBER:  11552
SUBJECT: GRB 110106B: early optical and near-IR observations
DATE:    11/01/11 11:38:30 GMT
FROM:    Javier Gorosabel at IAA-CSIC  <jgu at iaa.es>

J. Gorosabel, A.J. Castro-Tirado, M. Jelinek (IAA-CSIC, Granada), P. Kubanek (U. Valencia & IAA-CSIC, Granada), M. Visus, R. Tata (IAC, Obs. del Teide, Tenerife), A. Sota (OSN, Granada), S. Mottola, C. Faber (DLR, German  Aerospace Center, Berlin), report on behalf of a larger collaboration:

"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."