Robuta

https://test.gcn.nasa.gov/circulars/1125 GCN - Circulars - 1125 - GRB010921, optical observations gcn circulars optical observations https://gcn.nasa.gov/circulars/1108 GCN - Circulars - 1108 - GRB010921: Spectroscopy of the Host Galaxy of the gcn circulars spectroscopy host