Identification of the donor in GRS 1915+105
  We report on the results of medium-resolution spectroscopy of GRS 1915+105 in the H and K band using the 8m VLT at ESO. We clearly identify absorption bandheads from CO12 and CO13. Together with other features this results in a classification of the donor as a K-M III star. 
J. Greiner, M.J. McCaughrean (both AIP Potsdam, Germany), J.G. Cuby   (ESO, Chile), A.J. Castro-Tirado (IAA Granada, Spain),...