Robuta

https://test.gcn.nasa.gov/circulars/28737 GCN - Circulars - 28737 - GRB 201020A: VIRT optical observations gcn circulars grb virt optical https://gcn.nasa.gov/circulars/28700 GCN - Circulars - 28700 - Swift GRB 201020A: Global MASTER-Net observations report global master gcn circulars swift grb https://gcn.nasa.gov/circulars/28742 GCN - Circulars - 28742 - GRB 201020A: Swift/UVOT Observations gcn circulars grb swift observations