V854 Cen was observed in July 1989 with the Cassegrain echelle spectrograph on the CTIO 4m reflector, together with many other R CrB stars which form the basis for the analysis described in Lambert et al. (1998). At the time, the star was at or close to maximum light. Both red (5500-6840 Å) and blue (4200-4900 Å) spectra were obtained at a resolution of about 0.3 Å. The signal-to-noise of the different spectra is 100 or higher over most of the observed bandpass.
For the C2 Swan 0-1 band, the He I triplet and the hydrogen lines, synthetic spectroscopy were used to fit the spectral features. Otherwise, equivalent widths of seemingly unblended lines were measured. A list of all lines used for the analysis can be found in Table 4.
© European Southern Observatory (ESO) 1998
Online publication: March 23, 1998