Robuta

https://gcn.nasa.gov/circulars/33092 GCN - Circulars - 33092 - Fermi GRB 221221A: Global MASTER-Net observations report global master gcn circulars fermi grb https://gcn.nasa.gov/circulars/33091 GCN - Circulars - 33091 - GRB 221221A: Fermi GBM Final Real-time Localization real time gcn circulars grb