ANTARES neutrino detection: CAHA photometry & spectroscopy of the Swift source. Castro-Tirado, A. J. ; Galadi-Enriquez, D. ; Hoyos, F. ; Guijarro, A. ; Fernandez, M. ; Tello, J. C. ; Jeong, S. ; Maiz-Apellaniz, J. ; Dornic, D. Abstract Publication: GRB Coordinates Network Pub Date: 2015 Bibcode: 2015GCN.18241....1C