The Second Byurakan Survey

Abstract

On the basis of the Second Byurakan Survey (SBS), we have produced a new complete sample of bright QSOs. The observations were obtained using the 1.5, 3 and 4 degree objective prisms with the 40–52 inch Schmidt telescope at the Byurakan Observatory. The total sky coverage area of SBS is 1000 square degrees from R.A. 07h40m–17h15m and Dec. +49–+61. In all, in SBS about 3000–1600 stellar objects have been selected, and about 1400 galaxies down to a limiting magnitude B ∼ 19.5. 290 QSO and 67 Sy galaxies are spectroscopically confirmed. The estimate of surface density of SBS QSOs in the magnitude range 15.5 < B < 17.2 and redshift distribution of SBS QSOs and Sy galaxies are given.

Star formation properties of isolated blue compact galaxies

“…We constructed a sample of galaxies that a priori meets extreme isolation criteria, based primarily on the studies of Lindner et al (1995, 1996, 1997, 1999). The sample consists mainly of galaxies selected from the SBS (Stepanian 2005 and references therein), an objective‐prism emission‐line galaxy survey in the sky region bordered by 7 h 40 m ≤α≤ 17 h 20 m and 49°≤δ≤ 61°, supplemented by galaxies from the Case Survey (Pesch & Sanduleak 1983; Salzer et al 1995) in the same right ascension range. These objects were in the direction of identified giant voids in the galaxy distribution, and their redshifts matched those of the voids.…”

“…We note that a large number of objects in our sample, originally catalogued as single objects, were commented on as being very close pairs of galaxies. Stepanian (2005) mentions this for no less than eight objects listed in Table 1 (e.g. SBS0745+601 with the mention ‘close binary with angular separation ∼3 arcsec in a common spheroidal shell’).…”

“…The absolute B magnitudes of the galaxies are listed in Column 2 of Table 4; we note that all the objects are fainter and that M B =−20 mag; while about 2/3 of the objects are not DGs ( M B ≤−18 mag), they are nevertheless fainter than L * . Below we add short individual descriptions from Stepanian (2005), Pustilnik et al (2002) and others for some of the objects.…”

“…SBS0749+582 is a star‐like blue compact dwarf galaxy (BCDG), with a weak continuum that did not record on the SBS objective‐prism plates (Stepanian 2005). He ii 4686 Å emission is present.…”

The variable star SBS 0150+339

“…We have discovered the variability of this star ( is not noted as a variable in the catalog from the Second Survey [1].…”