SIMBAD references

We have monitored P Cygni from 1990 to 1992 with a fiber-linked echelle spectrograph and a CCD detector. The spectra cover the wavelength range 4050A<λ<6750A with a spectral resolution of λ/{DELTA}λ≃12,000. The S/N-ratio of the spectra depends on wavelength and weather conditions, but typically it is better than 100. Due to the linear detector, we cannot only study radial velocities, but also the line strengths with good precision. We found variations in radial velocity of about 30 to 50km/s and line strength variations of the order of 30%. The typical timescales of the variations are months. Clear line splittings have not been found in our data.