Robuta

https://gcn.nasa.gov/circulars/2902 GCN - Circulars - 2902 - GRB 041223: Detection of Optical Transient with LCO40 gcn circulars grb https://test.gcn.nasa.gov/circulars/2910 GCN - Circulars - 2910 - GRB 041223: XRT afterglow spectrum and light curve gcn circulars grb https://test.gcn.nasa.gov/circulars/2909 GCN - Circulars - 2909 - GRB 041223 Fluence measured by Swift-BAT gcn circulars grb fluence measured