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

VERON98: Help

VERON98 - Veron Quasars & AGNs (V98)

VERON98 - Veron Quasars & AGNs (V98)


Overview

This catalogue is the 8th edition of the Catalog of Quasars and Active Galactic Nuclei by Veron-Cetty and Veron, and is an update of the previous versions. It contains 11358 (+2759 more than the 7th edition published in 1996) quasars (defined as objects brighter than absolute B magnitude of -23), 3334 (+501 more than the 7th edition) AGNs (defined as objects fainter than absolute B magnitude of -23), and 357 (+137 more than the 7th edition) BL Lac objects, that have been culled from 1863 (+201 more than the 7th edition) references. 57 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.

Rejected Quasars

        Name                  RA (2000) Dec

     Q 2357-005A           0  0 12.7 - 0 14 34
     Q 2357+009            0  0 26.5   1 14  0
     Q 2358-011            0  0 35.3 - 0 51 22
     Q 2358+029A           0  1  1.4   3 14 11
     Q 2358+004            0  1 12.9   0 44 43
     Q 2359+026            0  2  9.7   2 54 24
     Q 0002+022            0  4 47.8   2 29 16
     Q 0002+030A           0  5 11.8   3 19 36
     Q 0003+011B           0  5 56.8   1 25 32
     Q 0003+012B           0  6 32.8   1 29 17
     Q 0004-004            0  6 41.0 - 0  8 45
     Q 0004+014            0  6 53.2   1 45 56
     Q 0005+003            0  8  7.9   0 39 54
     Q 0008+010            0 10 42.9   1 18 41
     Q 0009+027B           0 11 42.4   3  0 28
     Q 0009-003            0 12  2.0 - 0  5  8
     Q 0010+023            0 13 13.6   2 36 15
     Q 0011-012A           0 13 37.4 - 0 58  9
     Q 0011-002A           0 13 59.0   0  3 20
     Q 0011+016            0 14 13.5   1 57 42
     Q 0012+011            0 15  8.5   1 24 27
     Q 0036-3954           0 39  3.3 -39 37 31
     Q 0058-4134           1  0 40.6 -41 18 29
     QSO 0111-2838         1 13 29.1 -28 22 22
     UM 100                1 22 56.2   2 57 32
     UM 348                1 38 12.2   1  3 52
     PKS 0254-671          2 55 13.5 -66 57  1
     QSF3:22               3 40 59.9 -44 14 20
     MC 1210+121          12 12 33.0  11 51 11
     Q 1250-0700          12 53 21.8 - 7 16 54
     PKS 1301-192         13  4 34.8 -19 32 44
     BG 57 11             13  7  9.5  29  6  7
     BG 57 15             13  7 32.5  29 15 46
     BG 57 17             13  7 42.5  29 22  5
     BG 57 20             13  7 59.3  29 28 47
     BG 57 21             13  8  3.5  29 30 20
     BG 57 23             13  8  6.0  29  6 53
     BG 57 26             13  8 13.1  29 20 42
     BG 57 27             13  8 13.5  29 32 56
     BG 57 42             13  9 12.7  29 31  1
     BG 57 43             13  9 12.8  29 20 20
     BG 57 45             13  9 27.1  29  5 37
     AH 23                13  9 40.1  29 13 36
     BG 57 49             13 10  1.4  29 23  7
     UM 571               13 23 59.8   2 11  8
     2E 1326+1200         13 28 35.7  11 45 18
     MC 1620+103          16 22 33.9  10 13  8
     Q 2119-4509          21 23  9.2 -44 56 38
     2127.1-1577          21 29 49.4 -15 33 14
     H 13                 21 42  4.7 -43 27 48
     2154-204U            21 56 46.6 -20  9 42
     Q 2348-011A          23 50 35.7 - 0 52 20
     Q 2349-012           23 51 47.2 - 0 59 55
     Q 2350-014           23 52 44.3 - 1  9 11
     Q 2350-019A          23 52 45.1 - 1 41 14
     Q 23552+1842         23 57 45.6  18 59 31
     Q 2356+007           23 58 38.4   1  4  3

Parameters

Name
The most common name of the object.

Ra
The Right Ascension of the object.

Dec
The Declination of the object.

Lii
The galactic longitude of the object.

Bii
The galactic latitude of the object.

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

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

Redshift
The redshift of the object.

Ref_redshift
Numerical code of the reference for the redshift.

Flag_redshift
This flag is set to E if the red-shift was estimated from a low-dispersion, slitless spectrum, and is set to > if the quoted red-shift is a lower limit.

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.

Flux_11_cm
The flux density at 11 cm (2.7 GHz) in milliJanskies (mJy).

Ref_flux_11_cm
Numerical code of the reference for the 11 cm flux density.

Abs_mag
The absolute magnitude.

App_mag
The apparent magnitude; the type of magnitude is specified by the parameter Flag_App_Mag, but is usually the visual magnitude.

Ref_app_mag
Numerical code of the reference for the photometry.

Flag_app_mag
This flag is V for a visual magnitude, P for a photographic magnitude, R for a red magnitude, and I for an I-band magnitude.

Table_number
The number of the original input table. The table in the original catalog in which this object was listed:

      1 = Table 1.  Contains 11358 quasars.
          (defined as objects brighter than absolute magnitude of -23)
  
      2 = Table 2.  Contains 357 confirmed, probable, or
          possible BL Lac objects.
  
      3 = Table 3.  Contains 3334 active galaxies.
          (defined as objects fainter than absolute magnitude of -23)
  

Radio_detect
This flag is Y if detected, N if not detected, in the radio.

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
  

Ref_chart
Numerical code of the reference for the finding chart.

Object_type
A code 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: narror-line Seyfert 1
       S1.0, S1.2, S1.5, S1.8, S1.9: intermediate Seyfert galaxies
       S2: Seyfert 2 spectrum
       S3: Seyfert 3 or liner
       S : unclassified Seyfert
       S?: possibly a Seyfert
       H2: nuclear HII region
       HP: high optical polarization (>3%)
       BL: confirmed BL Lac object
       Q : quasar
       B?: probable or possible BL Lac object
       AG: unspecified type of active galaxy
  
Default Object_Type values are set for tables 1, 2, and 3 to the following if none are given.
      Table 1 =  Q : quasar
      Table 2 =  B?: probable or possible BL Lac object
      Table 3 =  AG: unspecified type of active galaxy
  

Class
BROWSE classification type. The classification is based on the Object_Type parameter.


References

Catalog of Quasars and Active Galactic Nuclei (8th Edition), Veron-Cetty, M.P. and Veron, P. 1998, ESO Scientific Report 18. 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.
A complete list of the references that are given as numerical codes in this database can be obtained (as a gzipped ASCII file veron98.refs.gz in the directory heasarc/dbase/misc_files) via anonymous ftp from legacy.gsfc.nasa.gov.

Provenance

This online catalog was created by the HEASARC in August 1999 based on machine-readable tables obtained from the ADC/CDS data centers (their catalog VII/207: tables table1.dat, table2.dat, and table3.dat).

Contact Person

Questions regarding the VERON98 database 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