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VERON96: Help

VERON96 - "Veron Quasars & AGN (V96)"

VERON96 - "Veron Quasars & AGN (V96)"


Overview

This database is the 7th edition of the Catalog of Quasars and Active Galactic Nuclei by Veron-Cetty and Veron, and is an update of the previous versions, containing data culled from 1662 references (+176 more than the 6th edition published in 1993). It contains 8609 quasars (+1226 more than the 6th edition), where quasars are defined as objects brighter than an absolute B magnitude of -23), 2833 AGNs (+978 more), where AGNs are defined as objects fainter than absolute B magnitude -23), and 220 BL Lac objects (+49 more). 52 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.


Parameters

Name
The most common name of the object.

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

Abs_Mag
The absolute magnitude.

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 red-shift of the object.

Ref_Redshift
Numerical code of the reference for the red-shift.

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.

Object_Type
A code describing the classification of the object:

---
       S1: Seyfert 1 spectrum
       S2: Seyfert 2 spectrum
       S3: Seyfert 3 or liner
       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
---

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, and 'R' for a red magnitude.

Table_Number
Number of original table. The table in the original catalog in which this object was listed:

---
      1 = Table 1.  Contains 8609 quasars.
          (defined as objects brighter than absolute magnitude of -23)

  
      2 = Table 2.  Contains 220 confirmed, probable, or
          possible BL Lac objects.

  
      3 = Table 3.  Contains 2833 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
---

Flag_Redshift
This flag is set to '*' 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.

Ref_Chart
Numerical code of the reference for the finding chart.

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


References

Catalog of Quasars and Active Galactic Nuclei (7th Edition), Veron-Cetty, M.P. and Veron, P. 1996, ESO Scientific Report 17. 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.
---
A complete list of the references that are given as numerical codes in this database can be obtained (as a gzipped ASCII file veron96.refs.gz in the directory heasarc/dbase/misc_files) via anonymous ftp from legacy.gsfc.nasa.gov.


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
     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 43             13  9 12.8  29 20 20
     BG 57 42             13  9 12.7  29 31  1
     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
     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 2356+007           23 58 38.4   1  4  3
---------------------------------------------------------------------------

Contact Person

Questions regarding the VERON96 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
 
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