LEDAS  
Leicester Database and Archive Service
 
ARNIE Index
ARNIE Help
ARNIE Tutorial
Search...
All databases
All helpfiles
Line
Footer
E-mail

VERONCAT: Help

VERONCAT - Veron Catalog of Quasars & AGN, 12th Edition


Overview

This database table contains the 12th edition of the Catalog of Quasars and Active Galactic Nuclei by Veron-Cetty and Veron, and is an update of the previous versions. The recent release of the last three installments of the Sloan Digital Sky Survey led the authors to prepare an new version of their catalog, which now contains 85221 quasars, 1122 BL Lac objects and 21737 active galaxies (including 9628 Seyfert 1 galaxies), almost doubling the number of objects listed in the 11th edition.

The 12th includes positions and redshifts, as well as photometry (U, B, and V) and 6-cm and 20-cm flux densities, when available. 141 objects once proposed but now rejected as quasars are NOT included in the online version of this catalog: their names and positions are listed in the Rejected_Quasars section of this help file. This HEASARC table also does NOT contain the additional information on gravitationally lensed quasars and quasar pairs listed in Tables 2 and 3 of the published paper: these tables are available in electronic form at ftp://cdsarc.u-strasbg.fr/pub/cats/VII/248/

The present edition of this catalog contains quasars with measured redshift known prior to January 1st, 2006.


Catalog Bibcode

2006A&A...455..773V

References

The current edition of this catalog is:
Quasars and Active Galactic Nuclei (12th Ed.)
     Veron-Cetty M.P., Veron P.
    <Astron. Astrophys. 455, 773 (2006)>
    =2006A&A...455..773V

Previous editions of this catalog are listed below:

    1st Edition, Veron-Cetty M.P., Veron P., 1984, ESO Scientific Report 1.
    2nd Edition, Veron-Cetty M.P., Veron P., 1985, ESO Scientific Report 4.
    3rd Edition, Veron-Cetty M.P., Veron P., 1987, ESO Scientific Report 5.
    4th Edition, Veron-Cetty M.P., Veron P., 1989, ESO Scientific Report 7.
    5th Edition, Veron-Cetty M.P., Veron P., 1991, ESO Scientific Report 10.
    6th Edition, Veron-Cetty M.P., Veron P., 1993, ESO Scientific Report 13.
    7th Edition, Veron-Cetty M.P., Veron P., 1996, ESO Scientific Report 17.
    8th Edition, Veron-Cetty M.P., Veron P., 1998, ESO Scientific Report 18.
    9th Edition, Veron-Cetty M.P., Veron P., 2000, ESO Scientific Report 19.
   10th Edition, Veron-Cetty M.P., Veron P., 2001, Astron. Astrophys. 374, 92
   11th Edition, Veron-Cetty M.P., Veron P., 2003, Astron. Astrophys. 412, 399
A complete list of the references that are given as numerical codes in this database can be obtained via anonymous FTP or the Web at ftp://cdsarc.u-strasbg.fr/pub/cats/VII/248/refs.dat.gz

Provenance

This online catalog was created by the HEASARC in August 2006 based on machine-readable tables obtained from the CDS (their catalog VII/248, files qso.dat.gz, bllac.dat.gz, and agn.dat.gz).

Rejected Quasars

We list below 141 objects that were once proposed but are now rejected as quasars, and hence are NOT included in the online version of the catalog (this listing is based on ftp://cdsarc.u-strasbg.fr/pub/cats/VII/248/rejected.dat.gz ):

     Name           RA (2000) Dec           Original     Mag   New   Ref Code   RA (1950) Dec
                                        Redshift & Class      Class  for Class

 *Q 2357-005A       0  0 12.7 - 0 14 34      *2.83   Q    18.0   G  2142  23 57 38.9 - 0 31 16
 *Q 2357+009        0  0 26.5   1 14  0      *3.05   Q    17.0   *  2142  23 57 52.7   0 57 18
 *Q 2358-011        0  0 35.3 - 0 51 22      *3.22   Q    17.5   *  2142  23 58  1.5 - 1  8  4
 *Q 2358+029A       0  1  1.4   3 14 11      *3.13   Q    17.5   *  2142  23 58 27.6   2 57 29
 *Q 2358+004        0  1 12.9   0 44 43      *2.94   Q    17.0   *  2142  23 58 39.1   0 28  1
 *UM 194            0  1 16.6   0  2  7 O     0.780  Q   O19.1   *  1133  23 58 42.8 - 0 14 35
 *Q 2359+026        0  2  9.7   2 54 24      *3.14   Q    17.0   *  2142  23 59 35.9   2 37 42
 *Q 0002+022        0  4 47.8   2 29 16      *3.17   Q    18.0   *  2142   0  2 14.0   2 12 34
 *Q 0002+030A       0  5 11.8   3 19 36      *3.15   Q    18.5   *  2142   0  2 38.0   3  2 54
 *Q 0003+011B       0  5 56.8   1 25 32      *3.17   Q    18.0   *  2142   0  3 23.0   1  8 50
 *Q 0003+012B       0  6 32.8   1 29 17      *3.12   Q    18.0   *  2142   0  3 59.0   1 12 35
 *Q 0004-004        0  6 41.0 - 0  8 45      *3.12   Q    17.5   *  2142   0  4  7.2 - 0 25 27
 *Q 0004+014        0  6 53.2   1 45 56      *3.17   Q    18.5   *  2142   0  4 19.4   1 29 14
 *Q 0005+003        0  8  7.9   0 39 54      *3.00   Q    17.5   G  2142   0  5 34.1   0 23 12
 *Q 0008+010        0 10 42.9   1 18 41      *3.12   Q    19.0   *  2142   0  8  9.1   1  2  0
 *Q 0009+027B       0 11 42.4   3  0 28      *3.17   Q    16.0   *  2142   0  9  8.5   2 43 47
 *Q 0009-003        0 12  2.0 - 0  5  8      *3.02   Q    18.0   *  2142   0  9 28.2 - 0 21 49
 *Q 0011-012A       0 13 37.4 - 0 58  9 O    *2.23   Q    17.0   *  2142   0 11  3.7 - 1 14 50
 *Q 0011-002A       0 13 59.0   0  3 20      *3.10   Q    17.5   G  2142   0 11 25.2 - 0 13 21
 *Q 0011+016        0 14 13.5   1 57 42      *3.22   Q    17.5   *  2142   0 11 39.6   1 41  2
 *Q 0012+011        0 15  8.5   1 24 27      *1.67   Q    18.0   *  2142   0 12 34.6   1  7 47
 *2QZ J002529-3104  0 25 29.9 -31  4 33 O            BL  *19.45  *  1260   0 23  0.4 -31 21 10
 *Q 0036-3954       0 39  3.3 -39 37 31 O    *0.45   Q   *17.32  *   498   0 36 38.7 -39 54  0
 *Q 0036-2939       0 39 27.4 -29 23 20 O    *2.16   Q   *19.54  *   504   0 36 59.9 -29 39 48
 *Q 0037-3103       0 39 39.0 -30 47  1 O    *2.96   Q   *19.90  *   502   0 37 11.9 -31  3 29
 *SDSSp J00470-0048 0 47  5.9 - 0 48 19 O     0.546  Q    18.96  ?  1890   0 44 32.3 - 1  4 41
 *SDSS J00485+0017  0 48 30.3   0 17 52 O            BL   18.17  *  1133   0 45 56.5   0  1 31
 *Q 0047-3150       0 50 21.9 -31 34 26 O    *2.02   Q   *19.05  *   504   0 47 56.9 -31 50 45
 *Q 0048-2952       0 50 33.2 -29 36 14 O     1.244  Q   *20.19  *   502   0 48  7.6 -29 52 33
 *Q 0048-2939       0 50 38.0 -29 22 45 O    *2.20   Q   *18.77  *   502   0 48 12.3 -29 39  4
 *CT 193            0 54 43.3 -28 31 19 O     0.639  Q   *19.5   *   502   0 52 18.0 -28 47 34
 *Q 0053-3101       0 55 24.9 -30 45  9 O    *2.20   Q   *17.96  *   504   0 53  0.5 -31  1 23
 *SGP4:10           0 57 54.2 -27 27  0 O     0.907  Q   *20.6   *   502   0 55 29.0 -27 43 12
 *Q 0055-3004       0 58 22.6 -29 48 18 O    *2.10   Q   *18.98  *   504   0 55 58.3 -30  4 29
 *Q 0056-2847       0 58 46.3 -28 31 35 O     0.800  Q   *20.49  *   502   0 56 21.6 -28 47 46
 *SGP1:22           0 59 16.3 -28 45 38 O     1.281  Q   *20.8   *   502   0 56 51.8 -29  1 48
 *CS 142            1  0 15.9 -28  4 52 O    *2.30   Q    19.8   *   502   0 57 51.3 -28 21  1
 *Q 0058-4134       1  0 40.6 -41 18 29 O    *1.29   Q   *17.40  *   498   0 58 22.0 -41 34 38
 *SDSS J01038-1002  1  3 52.2 -10  2 30 O            BL   18.91  *  1133   1  1 21.7 -10 18 35
 *QSO 0111-2838     1 13 29.1 -28 22 22 O     4.042  Q    19.75  G  1953   1 11  6.6 -28 38 15
 *Q 0117-378        1 19 56.8 -37 37 28      *2.25   Q    20.0   ?  1044   1 17 40.5 -37 53 12
 *UM 100            1 22 56.2   2 57 32 O     3.272  Q    18.    G  2438   1 20 21.3   2 41 53
 *Q 0121-3758       1 23 25.9 -37 42 24 O    *2.21   Q   O19.7   *  1044   1 21 10.4 -37 58  2
 *Q 0123-3713       1 25 27.1 -36 58  6 O    *2.13   Q   O19.7   *  1044   1 23 11.5 -37 13 41
 *Q 0133-4218       1 35 15.9 -42  3 28      *2.68   Q   *19.84  *   580   1 33  6.3 -42 18 47
 *Q 0133-4217       1 35 22.8 -42  2 21      *2.58   Q   *20.25  *   580   1 33 13.2 -42 17 40
 *UM 348            1 38 12.2   1  3 52              BL   17.    *  2206   1 35 38.0   0 48 38
 *SDSS J01438+0021  1 43 49.2   0 21 27 O     1.317       18.28  ?  1891   1 41 15.3   0  6 24
 *RXS J01538+0152   1 53 49.9   1 52 44 O     0.127  Q   O15.1   *  2222   1 51 15.2   1 38  0
 *Q J02469-2948     2 46 59.6 -29 48 22 O            BL  *19.90  *  1260   2 44 51.3 -30  0 53
 *SDSS J02493-0809  2 49 21.6 - 8  9 57 O     1.276       19.98  ?  1891   2 46 54.3 - 8 22 21
 *2QZ J025425-3158  2 54 26.0 -31 58 34 O            BL  *19.38  *  1260   2 52 21.0 -32 10 43
 *SDSS J02548-0717  2 54 48.5 - 7 17 35 O     2.937       19.09  ?  1891   2 52 20.7 - 7 29 43
  PKS 0254-671      2 55 13.5 -66 57  1 O    *2.23   Q    18.5   *  2220   2 54 28.8 -67  9  6
 *SDSS J03130-0616  3 13  3.3 - 6 16  0 O            BL   20.27  *  1133   3 10 35.1 - 6 27 11
 *2QZ J031435-3105  3 14 35.2 -31  5 44 O            BL  *18.26  *  1260   3 12 31.7 -31 16 50
 *SDSS J03174-0716  3 17 29.7 - 7 16 44 O            BL   20.05  *  1133   3 15  2.5 - 7 27 41
 *SDSS J03211-0700  3 21  8.3 - 7  0 31 O            BL   19.91  *  1133   3 18 40.9 - 7 11 15
 *SDSS J03244-0046  3 24 28.8 - 0 46 14 O     0.213  S1   19.31  ?  1891   3 21 55.8 - 0 56 47
 *SDSSp J03361-0007 3 36  6.7 - 0  7 54 O     0.431  S2   20.37  ?  1891   3 33 33.1 - 0 17 47
 *QSF3:22           3 40 59.9 -44 14 20 O     0.719  Q    20.6   *  1910   3 39 19.6 -44 23 54
 *SDSS J04121-0540  4 12  9.3 - 5 40 31 O            BL   19.24  *  1133   4  9 41.5 - 5 48 10
  MCG -01.12.005    4 25 51.3 - 8 33 38 O     0.039  BL   15.9   G   178   4 23 26.8 - 8 40 23
 *SDSS J09106-0042  9 10 40.3 - 0 42 26 O     1.036       21.08  *  1891   9  8  7.0 - 0 30  9
 *SDSS J09325+5536  9 32 33.5  55 36 20 O     0.911       20.24  ?  1891   9 29  0.4  55 49 37
 *SDSS J09389+0209  9 38 59.3   2  9 24 O     1.410       19.96  ?  1891   9 36 24.0   2 22 59
 *2QZ J101226+0037 10 12 26.1   0 37  3 O     0.686  S1  *20.32  *  1133  10  9 52.0   0 51 54
 *Q J10262-0006    10 26 15.4 - 0  6 30 O            BL  *19.40  *  1260  10 23 41.6   0  8 47
 *2QZ J102702+0034 10 27  2.3   0 34  3 O            BL  *19.52  *  1260  10 24 28.2   0 49 21
 *SDSS J10327-0032 10 32 43.4 - 0 32 43 O            BL   20.23  *  1133  10 30  9.8 - 0 17 15
 *SDSS J10381-0036 10 38  9.2 - 0 36 22 O     1.490       17.09  *  1133  10 35 35.6 - 0 20 45
 *2QZ J104134+0037 10 41 34.7   0 37 11 O            BL  *19.82  *  1133  10 39  0.6   0 52 53
 *QNB1:46          10 42 29.5   1 32 22 O     0.716  Q   *21.1   *   504  10 39 55.1   1 48  5
 *Q J10453+0026    10 45 19.7   0 26 15 O            BL  *18.68  *  1133  10 42 45.7   0 42  2
 *SDSS J10473+0007 10 47 18.3   0  7 18 O     1.235       17.59  *  1133  10 44 44.4   0 23  8
 *2QZ J105037-0115 10 50 37.8 - 1 15 57 O            BL  *19.44  *  1260  10 48  4.4 - 1  0  2
 *Q J10539-0055    10 53 55.2 - 0 55 38 O            BL  *19.53  *  1260  10 51 21.7 - 0 39 39
 *2QZ J105632-0010 10 56 32.1 - 0 10 42 O            BL  *18.58  *  1133  10 53 58.4   0  5 20
 *Q J11067+0007    11  6 44.5   0  7 17 O            BL  *19.86  *  1260  11  4 10.7   0 23 31
 *Q J11401-0029    11 40 10.5 - 0 29 37 O            BL  *19.90  *  1133  11 37 36.8 - 0 12 59
 *SDSS J11453-0247 11 45 21.6 - 2 47 57 O            BL   18.63  *  1260  11 42 48.1 - 2 31 17
 *Q J12059-0042    12  5 58.2 - 0 42 16 O            BL  *19.11  *  1260  12  3 24.4 - 0 25 34
 *Q J12080-0042    12  8  1.9 - 0 42 20 O            BL  *18.96  *  1260  12  5 28.1 - 0 25 38
  MC 1210+121      12 12 33.0  11 51 11 O            BL   18.0   *  1847  12  9 59.9  12  7 52
 *UM 493           12 22  6.5 - 1  6 38 O            BL   17.    *   357  12 19 32.6 - 0 50  0
 *Q J12236-0156    12 23 38.1 - 1 56 19 O            BL  *19.22  *  1260  12 21  4.1 - 1 39 42
 *2QZ J124034-0145 12 40 35.0 - 1 45  0 O            BL  *19.47  *  1260  12 38  0.9 - 1 28 33
 *Q 1250-0700      12 53 21.8 - 7 16 54 O     0.097  Q    16.43  *  2384  12 50 46.1 - 7  0 38
 *UM 531           12 58 17.3   0  7 11 O    *2.08   Q   O18.5   *   504  12 55 43.6   0 23 22
 *Q J13001-0226    13  0  9.9 - 2 26  1 O            BL  *19.22  *  1133  12 57 35.4 - 2  9 52
 *2QZ J130014+0135 13  0 14.4   1 35 39 O            BL  *20.17  *  1133  12 57 41.1   1 51 48
 *2QZ J130023+0138 13  0 23.2   1 38 51 O            BL  *20.01  *  1133  12 57 50.0   1 55  0
  PKS 1301-192     13  4 34.8 -19 32 44 O            BL   18.    *  2220  13  1 54.6 -19 16 40
 *2QZ J130639+0113 13  6 39.4   1 13 40 O            BL  *19.33  *  1133  13  4  6.1   1 29 42
 *BG 57 11         13  7  9.5  29  6  7      *3.05   Q    20.1   *   615  13  4 46.3  29 22  8
 *BG 57 15         13  7 32.5  29 15 46      *2.86   Q    20.8   *   615  13  5  9.5  29 31 46
 *BG 57 17         13  7 42.5  29 22  5 O    *3.32   Q   *19.16           13  5 19.5  29 38  5
 *BG 57 20         13  7 59.3  29 28 47 O    *2.25   Q   *18.54  G   258  13  5 36.4  29 44 47
 *BG 57 21         13  8  3.5  29 30 20 O    *3.24   Q   *18.78           13  5 40.7  29 46 20
 *BG 57 26         13  8 13.1  29 20 42 O    *2.90   Q   *18.40           13  5 50.2  29 36 41
 *CSO  823         13  8 13.5  29 32 56 O    *2.95   Q   *17.83  *   615  13  5 50.7  29 48 55
 *BG 57 42         13  9 12.7  29 31  1      *2.82   Q    17.6            13  6 50.1  29 46 59
 *BG 57 43         13  9 12.8  29 20 20      *0.72   Q    19.5            13  6 50.1  29 36 18
 *BG 57 45         13  9 27.1  29  5 37      *2.42   Q    21.5            13  7  4.3  29 21 35
 *AH 23            13  9 40.1  29 13 36 O    *1.79   Q   *19.62  *  1154  13  7 17.4  29 29 33
 *CSO  832         13 10  1.4  29 23  7      *2.95   Q    16.6      1817  13  7 38.8  29 39  4
 *Q 1311+4635      13 13 22.8  46 19 30       0.001      R18.82  H2       13 11 10.8  46 35 22
 *Q J13165-0028    13 16 35.1 - 0 28 10 O            BL  *19.82  *  1260  13 14  1.2 - 0 12 22
 *UM 566           13 19 55.1   1 52 58 O            ?    18.    *   504  13 17 22.1   2  8 42
 *UM 571           13 23 59.8   2 11  8 O    *1.33   Q    18.1   *   934  13 21 27.0   2 26 45
 *SDSSp J13247-021713 24 44.1 - 2 17 46 O     2.264       21.72  ?  1891  13 22  9.4 - 2  2 10
 *2E 1326+1200     13 28 35.7  11 45 18 A            BL   19.             13 26  7.2  12  0 48
 *2QZ J132849-0024 13 28 49.1 - 0 24 27 O            BL  *19.56  *  1260  13 26 15.2 - 0  8 57
 *2QZ J133703-0039 13 37  3.1 - 0 39 10 O            BL  *19.08  *  1260  13 34 29.1 - 0 23 54
 *SDSS J13443+6702 13 44 19.4  67  2 55 O            BL   19.81  *  1133  13 42 55.0  67 17 56
 *Q J14003+0019    14  0 21.0   0 19 56 O            BL  *19.89  *  1260  13 57 47.5   0 34 26
  Q J14021-0130    14  2  7.7 - 1 30 33 O            BL  *19.71  *  1518  13 59 33.1 - 1 16  7
 *SDSS J14065+0148 14  6 32.4   1 48 38 O     1.084       18.53  *  1133  14  3 59.8   2  2 54
 *NPM1G-04.0478    14  7 30.8 - 5 10 10 O     0.380  Q    15.79  G  1433  14  4 53.9 - 4 55 56
 *Q J14092-0000    14  9 16.4 - 0  0 12 O     2.128  BL  *18.84  *  1133  14  6 42.7   0 13 58
 *2QZ J142127-0200 14 21 28.0 - 2  0 33 O            BL  *18.85  *  1260  14 18 53.0 - 1 46 53
  SDSS J14428+0015 14 42 48.5   0 15 40 O     1.123       21.39  ?  1891  14 40 15.0   0 28 23
 *SDSS J15116+0155 15 11 36.7   1 55 18 O     2.229       20.20  *  1133  15  9  4.7   2  6 34
  MC 1620+103      16 22 33.9  10 13  8              BL   18.4   *   357  16 20 11.1  10 20  6
 *SDSS J16338+4311 16 33 53.2  43 11 10 O     1.058       21.05  ?  1891  16 32 17.8  43 17 21
 *SDSS J16556+3722 16 55 38.5  37 22 47 O     0.543       18.64  *  1133  16 53 53.8  37 27 28
 *SBS 1716+581     17 17 22.3  58  6  0 O     0.580  Q    16.91  *  1133  17 16 34.0  58  9  7
 *SDSS J17210+5324 17 21  1.0  53 24 33 O     2.762       19.35  *  1133  17 19 55.9  53 27 25
 *SDSS J21186-0803 21 18 41.0 - 8  3 47 O            BL   19.25  *  1133  21 16  1.0 - 8 16 27
 *Q 2119-4509      21 23  9.2 -44 56 38 O     3.79   Q   R19.20  *        21 19 52.7 -45  9 30
  SDSS J21273-0737 21 27 23.0 - 7 37 27 O     0.893       19.35  ?  1891  21 24 43.6 - 7 50 31
 *Q 2127.1-1577    21 29 49.4 -15 33 14       3.2    Q    16.5   *  2220  21 27  4.1 -15 46 25
 *2QZ J215530-3121 21 55 30.5 -31 21 48 O            BL  *18.70  *  1260  21 52 35.3 -31 36  3
 *Q 2154-204U      21 56 46.6 -20  9 42 A     1.882  Q           ?  1487  21 54  0.0 -20 24  0
 *Q J22052-3115    22  5 15.9 -31 15 38 O            BL  *19.58  *  1260  22  2 22.3 -31 30 14
 *2QZ J233139-2720 23 31 39.7 -27 20 18 O            BL  *18.83  *  1260  23 29  1.4 -27 36 52
 *Q 2348-011A      23 50 35.7 - 0 52 20      *3.07   Q    18.5   *  2142  23 48  1.9 - 1  9  1
 *Q 2349-012       23 51 47.2 - 0 59 55      *3.12   Q    16.5   *  2142  23 49 13.4 - 1 16 36
 *Q 2350-014       23 52 44.3 - 1  9 11      *1.46   Q    18.0   *  2142  23 50 10.5 - 1 25 52
 *Q 2350-019A      23 52 45.1 - 1 41 14      *3.10   Q    18.5   *  2142  23 50 11.2 - 1 57 55
 *Q 2356+007       23 58 38.4   1  4  3      *3.17   Q    18.5   *  2142  23 56  4.6   0 47 21

Parameters

Name
The most common name of the object.

RA
The Right Ascension of the object (given to a precision of 0.1 seconds of time in the original table).

Dec
The Declination of the object (given to a precision of 1 arcsecond in the original table).

LII
The Galactic Longitude of the object.

BII
The Galactic Latitude of the object.

Position_Flag
This flag is related to the accuracy and source for the quoted position:

      O =  optical position with an accuracy better than 1 arcsecond
      R =  radio position with an accuracy better than 1 arcsecond
      A =  approximate position
  

Radio_Detect
This flag is 'Y' if the object has been detected in the radio and 'N' if it has not been detected in the radio.

Flux_6_cm
The flux density at 6 cm (5 GHz) in milliJanskies (mJy).

Ref_Flux_6_cm
Numerical code of the reference for the 6-cm flux density. A complete list of the references that are given as numerical codes in this database can be obtained via anonymous FTP or the Web at ftp://cdsarc.u-strasbg.fr/pub/cats/VII/248/refs.dat.gz

Flux_20_cm
The flux density at 20 cm (1.4 GHz) in milliJanskies (mJy).

Ref_Flux_20_cm
Numerical code of the reference for the 20-cm flux density. A complete list of the references that are given as numerical codes in this database can be obtained via anonymous FTP or the Web at ftp://cdsarc.u-strasbg.fr/pub/cats/VII/248/refs.dat.gz

Redshift_Flag
This flag is set to 'E' if the redshift was estimated by slitless spectroscopy, and is set to '>' if the quoted redshift is a lower limit.

Redshift
The redshift of the object.

Object_Type
A code created by the catalog authors describing the classification of the object:

       S1:  Seyfert 1 spectrum
       S1h: broad polarized Balmer lines detected
       S1i: broad Paschen lines observed in the infrared
       S1n: narrow-line Seyfert 1
       S1.0, S1.2, S1.5, S1.8, S1.9: intermediate Seyfert galaxies
       S2:  Seyfert 2 spectrum
       S2?: probable Seyfert 2
       S3:  Seyfert 3 or liner
       S3b: Seyfert 3 or liner with broad Balmer lines
       S3h: Seyfert 3 or liner with broad polarized Balmer lines detected
       S :  unclassified Seyfert
       S?:  possibly a Seyfert
       H2:  nuclear HII region
       HP:  high optical polarization (>3%)
       BL:  confirmed BL Lac object
       BL?: probable BL Lac object
       ?:   questionable BL Lac object
       Q2: type-2 quasar
  

Default object_type values are set to the following for objects in tables qso.dat, bllac.dat and agn.dat, if none were explicitly given in the original tables:

      Table qso.dat    =  Q : quasar
      Table bllac.dat2 =  B?: presumed BL Lac object
      Table agn.dat    =  AG: unspecified type of active galaxy
  

App_Mag_Flag
This flag is 'V' for a visual magnitude; 'P' for a photographic magnitude; 'B' for a blue magnitude; 'R' for a red magnitude, 'I', 'J', or 'K' for infrared-band magnitudes; or 'O' for a magnitude from a photographic O- or J- plate.

App_Mag
The apparent magnitude of the object, where the type of magnitude is specified by the value of the app_mag_flag parameter.

BV_Color
The (B-V) color of the object, when known.

UB_Color
The (U-B) color of the object, when known.

Abs_Mag
The absolute magnitude of the object (a Hubble constant of 50 km/s/Mpc and a deceleration parameter of 0 have been assumed).

Ref_Chart
Numerical code of the reference for the finding chart. A complete list of the references that are given as numerical codes in this database can be obtained via anonymous FTP or the Web at ftp://cdsarc.u-strasbg.fr/pub/cats/VII/248/refs.dat.gz

Ref_App_Mag
Numerical code of the reference for the photometry. A complete list of the references that are given as numerical codes in this database can be obtained via anonymous FTP or the Web at ftp://cdsarc.u-strasbg.fr/pub/cats/VII/248/refs.dat.gz

Ref_Redshift
Numerical code of the reference for the redshift. A complete list of the references that are given as numerical codes in this database can be obtained via anonymous ftp or the Web at ftp://cdsarc.u-strasbg.fr/pub/cats/VII/248/refs.dat.gz

Broad_Type
The broad Veron object classification, a parameter created by the HEASARC which is based on the table in which it was listed in the original reference: objects in the qso.dat table have been assigned a value of 'QSO', those in bllac.dat, 'BLLAC', and those in agn.dat, 'AGN'.

Class
The HEASARC Browse classification type. The classification value is based on the value of the Object_Type parameter.


Contact Person

Questions regarding the VERONCAT database table can be addressed to the HEASARC User Hotline.
If you have any problems, please consult the help page or mail ledas-help@star.le.ac.uk
 
HOME
SEARCH
SERVICES INFO SOFTWARE ViZieR BLASTA DSS
ARCHIVES ASCA CHANDRA GINGA ROSAT ARNIE