LONG-TERM SPECTROSCOPIC MONITORING OF P-CYGNI-TYPE STARS .1. SPECTRALATLAS OF P-CYGNI

We have observed P Cygni with a spectral resolution of 12,000 in the w avelength range 4050 angstrom < lambda < 9050 angstrom with a fiber-li nked echelle spectrograph. By averaging many spectra we achieved a S/N -ratio of up to 2,000. We present a spectral atlas in the range from 4 050 to 9050 angstrom with line identifications. Apart from the dominan t P Cygni-type lines pure absorption features (telluric and interstell ar lines and interstellar bands) and a number of pure emission lines w ere identified. Two groups of pure emission lines are discernible: The forbidden lines ([FeII], [NiII], [TiII], [FeIII], [NII]) and lines of some SiII-, FeIII- and NII multiplets which are supposedly due to a f luorescence excitation mechanism.