GRB 130603A: Mitsume akeno optical observation. Ito, K. ; Saito, Y. ; Yano, Y. ; Usui, R. ; Tachibana, Y. ; Yoshii, T. ; Kurita, S. ; Yatsu, Y. ; Kawai, N. Abstract Publication: GRB Coordinates Network Pub Date: 2013 Bibcode: 2013GCN.14755....1I