GRB050730: confirmation of redshift. Rol, E. ; Starling, R. ; Wiersema, K. ; Vreeswijk, P. ; Levan, A. ; O'Mahony, N. ; Tadhunter, C. ; Rodriguez, J. ; Gonzalez-Delgado, R. M. Abstract Publication: GRB Coordinates Network Pub Date: 2005 Bibcode: 2005GCN..3710....1R