GRB and XRF on April 27, 2004. Detection by konus-wind and helicon (Coronas-f). Golenetskii, S. ; Mazets, E. ; Pal'Shin, V. ; Frederiks, D. ; Cline, T. Abstract Publication: GRB Coordinates Network Pub Date: 2004 Bibcode: 2004GCN..2584....1G