Robuta

https://gcn.nasa.gov/circulars/21217 GCN - Circulars - 21217 - GRB 170607A: NOT optical afterglow detection gcn circulars grb optical afterglow https://test.gcn.nasa.gov/circulars/21215 GCN - Circulars - 21215 - GRB 170607A: Enhanced Swift-XRT position gcn circulars grb enhanced swift https://test.gcn.nasa.gov/circulars/21214 GCN - Circulars - 21214 - GRB 170607A: Swift detection of a burst with a bright optical counterpart