Robuta

https://gcn.nasa.gov/circulars/19073 GCN - Circulars - 19073 - GRB 160221A: Swift-XRT afterglow detection gcn circulars grb swift xrt https://gcn.nasa.gov/circulars/19054?page=2&limit=100&query=GROND&view=index GCN - Circulars - 19054 - GRB 160221A: GROND upper limits gcn circulars grb grond upper