GRB 070311, deep optical photometry. Dai, X. ; Garnavich, P. ; Pogge, R. ; Hill, J. ; Fan, X. ; Prieto, J. ; Stanek, K. Z. ; Wagner, R. M. ; Rhoads, J. ; Egami, E. ; Bechtold, J. ; Herbert-Fort, S. Abstract Publication: GRB Coordinates Network Pub Date: 2007 Bibcode: 2007GCN..6219....1D