Robuta

https://test.gcn.nasa.gov/circulars/22029 GCN - Circulars - 22029 - GRB 171020A: NOT optical afterglow detection gcn circulars grb optical afterglow https://gcn.nasa.gov/circulars/22038 GCN - Circulars - 22038 - GRB 171020A: Swift-BAT refined analysis gcn circulars grb swift bat