Spectral Analysis of Super Soft X-ray Sources: V4743 Sagittarii
  Half a year after its outburst, the nova V4743 Sgr evolved into the brightest super-soft X-ray source in the sky with a flux maximum around 30A, exhibiting resonance lines of C V, C VI, N VI, N VII, and O VII. We present preliminary results of an analysis of the XMM-Newton RGS spectra by means of NLTE model-atmosphere techniques. 
Thomas Rauch (1 and 2), Marina Orio (3 and 4), R. Gonzales-Riestra   (5), Martin Still (6) ((1) Dr.-Remeis-Sternwarte, Bambe...