IceCube-190504A: Kanata optical/NIR follow-up observations. Sasada, M. ; Nakaoka, T. ; Akitaya, H. ; Kawabata, K. ; Utsumi, Y. ; Itoh, R. ; Morokuma, T. ; Ohta, K. ; Yamanaka, M. Abstract Publication: GRB Coordinates Network Pub Date: 2019 Bibcode: 2019GCN.24675....1S