Progress in spectral studies of the FBS blue stellar objects

Abstract

Spectral observations of 10 FBS blue stellar objects (BSO) with the OHP 1.93-m and BAO 2.6.m telescopes are reported, and overall progress in all the spectral observations and classifications of FBS BSO over 1987-2000 and in the classification of these objects based on all the accessible sources--in all, 753 out of 1103 objects--is discussed. Representative slit spectra for the major types of objects are presented and compared with digitized low dispersion spectra from the DFBS. The nature of the FBS objects is examined in terms of advances in the spectral studies. Two-color diagrams are constructed from the SDSS data and are used to find the regions occupied by the various types for further identification of objects of unknown type.

Spectral observations of blue stellar objects from FBS in the zone δ =+39°

“…The speed of the scanner made it possible to digitize the FBS survey (2000 plates) in a total time of 300 hours [19]. It was also used to scan the photographic spectra obtained on the 2.6-m telescope [1].…”

“…These scan parameters yielded spectra corresponding to CCD spectra with a size of 1650×121 pixels and pixel sizes of 16x16 m [1]. This made it possible to process the photographic spectra in a way analogous to that used for the digital spectra.…”

“…This paper is a continuation of a spectral study of blue stellar objects (BSOs). The goals of this study have been described in detail in an earlier paper [1].…”

Spectral observations of FBS blue stellar objects in the zone δ = + 35°

“…The major parameters for the classification were the lines that are present and the FW01 and FWHM of the Balmer lines. The procedure for digitizing and processing the spectra has been described in detail elsewhere [1]. unreliable.…”

“…The goals and other details of the program of spectral studies of FBS blue stellar objects are described elsewhere [1,2].…”