J. Gorosabel (IAA-CSIC/UPV-EHU), A. Sanchez-Lavega, I. Ordonez, S. Perez-Hoyos, R. Hueso (UPV/EHU), J.J. Salamero, D. Cebrian, P. Martorell, R. Pidal (Obs. Guirguillano), report on behalf of the BEGIRA project:
"We carried out optical observations of the GRB140226A/iPTF14yb transient field (Cenko et al., GCN 15883, Beardmore et al., GCN 15884, 15891) with the 1.23m CAHA telescope. The observations were performed in the R-band on Feb 28.14668-28.19763 UT. The object is detected with a Vega magnitude of R~23 calibrated against the USNO-B1.0 catalog."
[GCN OPS NOTE(04mar14): Per author's request, A.S-L was added to the author list.]