Robuta

https://gcn.nasa.gov/circulars/22578 GCN - Circulars - 22578 - GRB 180331B: Swift-XRT refined Analysis gcn circulars grb swift xrt https://gcn.nasa.gov/circulars/22579?query=180331B GCN - Circulars - 22579 - GRB 180331B: Swift/UVOT Upper Limits gcn circulars grb swift upper