Low resolution spectral observations were carried out in August 1992 with the CARELEC spectrograph
attached to the 1.92m telescope of the Observatoire de Haute Provence (OHP).
The resolution chosen was 260Å/mm, the slit-width 
.
The detector used was a Tektronix CCD chip with 
pixels.
The wavelength range covered is 
with a scale of
per pixel and a spectral resolution of 
(FWHM). The wavelength calibration was done by means
of a He-laboratory lamp and Hiltner102 served as a standard star.
The data reduction was carried out with the
software package MIDAS.