Spectroscopic observations of nine of the twelve objects associated either with an X-ray or a radio source (Table 2) and of 22 other FBS objects were carried out on October 27 and 28, 1997 and on May 25 and 26, 1998 with the CARELEC spectrograph [39] attached to the Cassegrain focus of the Observatoire de Haute-Provence (OHP) 1.93m telescope. A 260Åmm-1 grating was used; the spectral range was 3810-7365Å. The detector was a 512512 pixels, 2727m Tektronix CCD. The slit width was 21, corresponding to a projected slit width on the detector of 52m, or 1.9 pixel. The resolution, as measured on the night sky emission lines, was 14.3Å FWHM. The spectra were flux calibrated using the standard stars EG 145 and Feige 66 [42] which were also used to correct the observations for the atmospheric absorption.
Six of the X-ray or radio sources turned out to be QSOs, while three are stars. The 22 other observed objects are all stars, except one which is a Hii galaxy. Spectra of the nine X-ray or radio sources observed are presented in Fig. 3.
The journal of observations is given in Table 3, together with relevant data.
FBS 0732+396 was suspected of being non-stellar and having emission lines [9]. Our spectrum (Fig. 3) shows emission lines characteristic of a NLS1 galaxy at z = 0.118, with relatively narrow Balmer lines and strong Feii lines.
FBS 1255+447 is HS 1255+4445 at z = 0.30 [25].