We have obtained spectra with S/N>150 of candidate stars selected as
described in Sect. 2 (click here) at two different sites. First,
two observing runs at the
Observatoire de Haute-Provence (OHP)
on the 1.93m telescope (observer: E. Paunzen)
in February/March 1994 and February 1995 were dedicated to this project.
Using the CARELEC spectrograph (Lemaitre et al. 1990) with the
600 linesmm-1
grating (centered at 4200 Å) resulted in a nominal
resolution of 1.8 Åpixel-1
and a spectral coverage of about 900 Å.
Follow-up observations of candidate stars were made at the Dark Sky
Observatory 0.8 m reflector (Appalachian State University, observer: R.O.
Gray) using the Gray/Miller spectrograph with the 1200 linesmm-1 grating
(blazed at 4200 Å), giving a resolution of 0.85 Åpixel-1
and a spectral coverage of about 800 Å.
On both systems we have obtained spectra of many MK standards (Gray &
Garrison 1987, 1989a,b), some CP stars (Renson et al.
1991) and a number of confirmed 
Bootis stars (Gray & Corbally
1993; Paunzen
et al. 1997).
All spectra were reduced using standard IRAF-routines. After correcting
for the
bias, flat-field and thermal background, we have checked the
spectra for possible moonlight
contamination. If necessary, we have used a part of each frame to correct
for moonlight contamination, before applying a normalization and wavelength
calibration.