Robuta

https://test.gcn.nasa.gov/circulars/13317 GCN - Circulars - 13317 - GRB 120521B: Swift-BAT refined analysis gcn circulars grb swift bat https://gcn.nasa.gov/circulars/13316 GCN - Circulars - 13316 - GRB 120521B: Swift-XRT refined Analysis gcn circulars grb swift xrt https://test.gcn.nasa.gov/circulars/13305 GCN - Circulars - 13305 - GRB 120521B: Swift detection of a burst of a gcn circulars grb swift