Robuta

https://gcn.nasa.gov/circulars/3460 GCN - Circulars - 3460 - v2 - GRB 050509A: Further I-band imaging i band gcn circulars grb imaging https://test.gcn.nasa.gov/circulars/3389 GCN - Circulars - 3389 - GRB 050509A: Optical observations gcn circulars grb optical observations