ACDS V10.0 - Detailed Description of VII/264

ACDS V10.0 - Thu May 21 06:39:41 CEST 2026

| # Detailed Description of VII/264 : Second Byurakan Survey galaxies. Optical database (Gyulzadian+, 2011) |

Note : this is the description file of the original catalog. This HTML page corresponds well to the original description, but some minor changes in the format may have been introduced in the FITS output files in order to allow for arithmetic operations on quantities such as coordinates and times. h:m:s and d:m:s units are normally converted into degrees, and YYYY-MM-DD into julian days.
Similarly, some slight changes may have been introduced in the units; the value given in the HTML files supersedes the value indicated in the ReadMe file for this catalogue.

    VII/264    Second Byurakan Survey galaxies. Optical database (Gyulzadian+, 2011)
    ================================================================================
    Second Byurakan Survey galaxies. I. The optical database.
         Gyulzadian M., McLean B., Adibekyan V.Zh., Allen R.J., Kunth D.,
         Petrosian A., Stepanian J.A.
        <Astrofizika, 54, 21 (2011)>
        =2011Ap.....54...15G
        =2010yCat.7264....0G
    ================================================================================
    ADC_Keywords: Surveys ; Galaxies, photometry ; Redshifts ; Morphology ;
                  Photometry, photographic ; Photometry, infrared
    Keywords: Second Byurakan Survey Galaxies - astronomical data bases -
              galaxies: active - forming galaxies

    Abstract:
        A database for the entire catalog of the Second Byurakan Survey (SBS)
        galaxies is presented. It contains new measurements of their optical
        parameters and additional information taken from the literature and
        other databases. The measurements were made using Ipg(near-infrared),
        Fpg(red) and Jpg(blue) band images from photographic sky survey plates
        obtained by the Palomar Schmidt telescope and extracted from the
        STScI Digital Sky Survey (DSS). The database provides accurate
        coordinates, morphological type, spectral and activity classes,
        apparent magnitudes and diameters, axial ratios, and position angles,
        as well as number counts of neighboring objects in a circle of radius
        50kpc. The total number of individual SBS objects in the database is
        now 1676. The 188 Markarian galaxies which were re-discovered by SBS
        are not included in this database. We also include redshifts that are
        now available for 1576 SBS objects, as well as 2MASS infrared
        magnitudes for 1117 SBS galaxies.

    Description:
        Images extracted from the STScI Digitized Sky Survey (DSS) of Fpg(red)
        Jpg(blue), and Ipg(NIR) band photographic sky survey plates obtained
        by the Palomar telescope.

    File Summary:

           FileName      Lrecl  Records   Explanations

    ×                   80        .   This file
    × ReadMe            80        .   This file
    × sbs.dat          108     1676   Optical properties of SBS galaxies
    × codes.dat         22       21   Morphological codes
    × atlas.pdf        512     2886   Atlas as pdf file

    See also:
           II/223   : First Byurakan Survey (FBS) 2nd Program (Abrahamian+, 1990-96)
          VII/251   : SBS/Zwicky cluster relation (Gyulzadian+, 2008)
     J/A+AS/147/169 : Accurate positions of 2978 SBS objects (Bicay+, 2000)
     J/AJ/124/1283  : Faint Markarian galaxies of SBS. III. (Stepanian+, 2002)

    Byte-by-byte Description of file:  sbs.dat

       Bytes Format Units   Label    Explanations

       1- 10  A10   ---     SBS      The SBS designation (1)
      12- 13  I2    h       RAh      Hour of Right Ascension (J2000)
      15- 16  I2    min     RAm      Minute of Right Ascension (J2000)
      18- 22  F5.2  s       RAs      Second of Right Ascension (J2000)
          24  A1    ---     DE-      Sign of the Declination (J2000)
      25- 26  I2    deg     DEd      Degree of Declination (J2000)
      28- 29  I2    arcmin  DEm      Arcminute of Declination (J2000)
      31- 34  F4.1  arcsec  DEs      Arcsecond of Declination (J2000)
      36- 37  I2    ---     TT       Morphology type, in codes.dat file (2)
          38  A1    ---     n_TT     [B] B: presence of a bar
      40- 44  A5    ---     SC       Spectral classification (3)
      45- 51  A7    ---     AC       Activity class (4)
      52- 57  F6.4  ---     z        ? Heliocentric redshift
      59- 62  F4.1  mag     Bjmag    Apparent isophotal Jpg (blue) band magnitude
      64- 67  F4.1  mag     Rfmag    Apparent isophotal Fpg (red) band magnitude
      69- 72  F4.1  mag     Imag     Apparent isophotal Ipg (NIR) band magnitude
      74- 78  F5.1  arcsec  D(J)     Major Jpg (blue) band diameter
      80- 84  F5.3  ---     R(J)     [0/1] Axial ratio in Jpg (blue) band
      85- 87  I3    deg     PA(J)    ? Position angle in Jpg (blue) (5)
      89- 90  A2    ---     Nn       Number of galaxies detected within a 50kpc
                                      projected radius (6)
      92- 96  F5.2  mag     Jmag     ? The J band magnitude (7)
      98-102  F5.2  mag     Hmag     ? The H band magnitude (7)
     104-108  F5.2  mag     Kmag     ? The K band magnitude (7)

    Note (1): As it appears in the original lists (Stepanian, 2005RMxAA..41..155S)

    Note (2): The numerical coding used here for the morphological description
         of the galaxies is a slightly modified and simplified version of the
         morphological types T given in the RC3 catalog. The codes used are as
         in the codes.date file
    Note (3): According to Stepanian, 2005RMxAA..41..155S.

    Note (4): Activity class, when available, or description of the spectra
         according to (Stepanian, 2005RMxAA..41..155S) and DR7 of SDSS. The
         various Seyfert classes are denoted by 'Sy1', 'Sy1.5', 'Sy1.8',
         'Sy1.9' and 'Sy2'. The symbol 'Sy3' refers to LINERs. Starburst and
         HII nuclei respectively are indicated by 'SB' and 'HII'. QSOs and BL
         Lacertae objects are also identified.
    Note (5): Measured from North (PA=0 degrees) toward East between 0 and
         180deg. For round galaxies with axial ratio R(J)~1.00 position angles
         were not measured.
    Note (6): 'nd' indicates a Markarian galaxy with redshift smaller than
         0.005 and no neighbor counts were performed.
    Note (7): For 1117 galaxies 2MASX (e.g. Jarrett et al. 2000AJ....119.2498J)
         total J, H and K magnitudes are listed.

    Byte-by-byte Description of file:  codes.dat

       Bytes Format Units   Label     Explanations

       1-  2  I2    ---     TT        Morphocogical code
       4- 22  A19   ---     MType     Morphological type

    Acknowledgements:
        Vardan Adibekyan, adbvardan@rambler.ru

    References:
       Markarian & Stepanian                  Paper I     1983Afz....19..639M
       Markarian & Stepanian                  Paper II    1984Afz....20...21M
       Markarian & Stepanian                  Paper III   1984Afz....20..513M
       Markarian, Stepanian & Erastova        Paper IV    1985Afz....23..439M
       Markarian, Stepanian & Erastova        Paper V     1986Afz....25..345M
       Stepanian, Lipovetsky & Erastova       Paper VI    1988Afz....29..247S
       Stepanian, Lipovetsky & Erastova       Paper VII   1990Afz....32..441S
    ================================================================================
    (End)     Vardan Adibekyan [YSU, BAO], Patricia Vannier [CDS]        07-Dec-2010