GRB 130420A: Swift-XRT refined analysis. Maselli, A. ; Mangano, V. ; Stroh, M. C. ; Burrows, D. N. ; Kennea, J. A. ; Evans, P. A. ; Gompertz, B. P. ; Osborne, J. P. ; Melandri, A. Abstract Publication: GRB Coordinates Network Pub Date: 2013 Bibcode: 2013GCN.14422....1M