Robuta

https://gcn.nasa.gov/circulars/41475 GCN - Circulars - 41475 - GRB 250821B: BALROG localization (Fermi Trigger / GRB 250821672) gcn circulars grb balrog localization https://gcn.nasa.gov/circulars/41477 GCN - Circulars - 41477 - GRB 250821B: Fermi GBM Detection gcn circulars grb fermi gbm https://gcn.nasa.gov/circulars/41498 GCN - Circulars - 41498 - IPN triangulation of GRB 250821B (long/bright) gcn circulars ipn triangulation grb