Spectral observations of blue stellar objects from FBS in the zone δ = +43°

Abstract

Results of spectral observations of blue stellar objects from the FBS are presented for the purpose of classifying them, discovering new interesting objects, and studying the FBS sample as a whole. 99 FBS objects in the band with central declination δ = +43° were observed on the 2.6-m telescope at the Byurakan Observatory in 1987-1991 and have been digitized using a professional scanner and processed by MIDAS in a way similar to CCD spectra. 12 objects were also observed with the BAO-2.6 and OHP-1.93 telescopes using modern techniques during 1997-2000; some were repeated observations for confirming or correcting the classifications. A new planetary nebula, 7 white dwarfs, 78 hot subdwarfs, 9 HBB stars, and 6 stars in classes F-G were discovered. Proper motions in the range 57-84 mas/year were obtained for three stars (DA, DAB, and sdB). Three stars (a white dwarf and two subdwarfs) are identified with x-ray sources. The spectra of the 30 most interesting objects are given.

Search and Studies of the First Byurakan Survey Blue Stellar Objects

“…Spectroscopic observations proved the Second part of the FBS to be a rich source of QSOs, Seyferts, WDs, CVs, etc. (Mickaelian et al, 1999, 2001, 2002a, Sinamyan & Mickaelian, 2006, 2008a,b, 2009. Altogether, spectroscopic observations have been carried out for 406 FBS objects.…”

“…Most of the observations were carried out in 1987-1991, however, to have better data, the photographic spectra were digitized and reduced in MIDAS as CCD ones (1850 pixels length). The details are given in Mickaelian et al (1999Mickaelian et al ( , 2001, and Sinamyan & Mickaelian (2006, 2008a. In Table 1 we give the statistics of spectroscopic observations of the FBS BSOs.…”