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새 글 등록
|The Second Byurakan Survey. General Catalogue|
The Second Byurakan Survey (SBS) General Catalogue is presented. TheSBS, a continuation of the Markarian survey reaching fainter limitingmagnitudes, is the first survey which combines the search of galaxiesand QSOs. A total area of 991OS#square;degrees of the Northern sky wascovered with the use of three objective prisms in combination withSchott filters. The limited magnitude on the best plates reached B ~19.5.The General Catalogue consists of 3563 objects presented in two parts: aCatalogue of galaxies (1863 objects) and one of stellar objects (1700objects). The Catalogue of SBS AGN consists of 761 objects (155 SyG, 596QSOs, and 10 BLLac). Multi-wavelength data are presented for 1438 SBSobjects identified with X-ray, IRAS and FIRST sources.Spectrophotometric observations obtained over 26 years are available for3132 objects. Redshifts were measured for ~ 2100 extragalactic objects.Spectral classification is presented for ~ 2970 objects. The majority ofthe data is presented here for the first time. The Catalogue presentsnew large homogeneous deep representative complete samples of brightQSOs, AGNs, and faint UVX galaxies in the Northern sky. The SBS sampleis found to be complete at 70% for galaxies and ~ 85% for AGN/QSOs withB ≤ 17.5.
|Accurate optical positions for 2978 objects from the Second Byurakan Survey (SBS) with the Digitized Sky Survey|
Optical positions of 2978 objects listed in the Second Byurakan Survey(SBS) were obtained using the Digitized Sky Survey (DSS), and are givenwith an rms uncertainty ~ 1 arcsec in each coordinate. Tables 1 and 2are only available in electronic form at the CDS via anonymous ftp184.108.40.206 or via http://cdsweb.u-strasbg.fr/Abstract.html
|Arcsecond Positions of UGC Galaxies|
We present accurate B1950 and J2000 positions for all confirmed galaxiesin the Uppsala General Catalog (UGC). The positions were measuredvisually from Digitized Sky Survey images with rms uncertaintiesσ<=[(1.2")2+(θ/100)2]1/2,where θ is the major-axis diameter. We compared each galaxymeasured with the original UGC description to ensure high reliability.The full position list is available in the electronic version only.
|Accurate optical positions for 107 Byurakan objects and 11 blue stars from the 'Second Byurakan spectral Sky Survey (1)|
Abstract image available at:http://adsabs.harvard.edu/cgi-bin/nph-bib_query?1988AJ.....95.1678N&db_key=AST
|Second Byurakan spectral sky survey. I - Results for region centered on alpha = 11 H 30 min, delta = +59 deg 00 arcmin|
The results of a survey at 500 and 650 nm of a 4-deg x 4-deg region,performed using 1.5, 3, and 4-deg prisms on the Schmidt telescope atBiurakan Astrophysical Observatory are reported. The exposure times are30-60 min with the 1.5-deg prism and up to 3 h with the 3 and 4-degprisms; reciprocal dispersions at H-gamma are 1800, 900, and 280 A/mm,respectively; and limiting magnitude is 18.5-19.5 mag. Photographs, datatables, and detailed characterizations are provided for 107 objects,including 11 QSO candidates, 7 Seyfert galaxies, 11 BSOs, 29 galaxieswith UV continuum, and 56 emission galaxies without significant UVemission. The surface densities of QSOs and Seyfert galaxies and ofemission galaxies are 1.5 and over 5 per sq deg, respectively.
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