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PKSCAT90: Help

PKSCAT90 - Parkes Southern Radio Sources


Overview

PKSCAT90 is the Parkes Catalog (1990) which consists of radio and optical data for 8264 radio sources. It covers essentially all the sky south of declination +27 degrees but largely excludes the Galactic Plane and the Magellanic Cloud regions.

The original Parkes Radio Catalogue was compiled from major radio surveys with the Parkes radiotelescope at frequencies of 408 MHz and 2700 MHz. This work spanned a period of nearly 20 years and was undertaken largely by John Bolton and his colleagues. Since then, improved positions, optical identifications, and redshifts have been obtained for many of the sources in the Catalogue. Furthermore, flux densities at several frequencies have supplemented the original surveys so that the measurements now cover the frequency range 80-22,000 MHz. However, coverage at the highest frequencies is still sparse.

Important contributions to the usefulness of the Catalogue have been radio data from the Molonglo 408 MHz survey and the 80 MHz Culgoora measurements of Slee et al. PKSCAT90 should thus be regarded as a compendium of radio and optical data about southern radiosources. However, at the moment, it contains only sources originally found in the Parkes 2700 MHz Survey (see e.g. Part 14, Bolton et al, 1979, Aust J Phys, Astrophys Suppl, No. 46 and references therein.)

The original radio survey data of the Catalogue and the optical identifications have been published in a series of papers in the Australian Journal of Physics (see above reference). The associated optical spectral data on which redshifts were obtained has also been published, mainly in Astrophysical Journal and Monthly Notices of the Royal Astronomical Society.

About the completeness levels of the Catalogue in various parts of the sky: users should note that the sky zone between -4 and +4 degrees has been the subject of a re-survey and is now complete to 0.25 Jy.


Catalog Bibcode

1990PKS...C......0W

References

The Parkes Catalogue 1990 (PKSCAT90), The Southern RadioSource Database, Australia Telescope National Facility, Alan Wright and Robina Otrupcek.

The Parkes 2700 MHz Survey (see, e.g., Part 14, Bolton et al, 1979, Aust J Phys, Astrophys Suppl, No. 46 and references therein)


Parameters

Alt_Name
A common alternative designation for the object.

BII
The galactic latitude of the object.

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

Dec
The Declination of the object.

Dec_1950
Declination in 1950 Coordinates

Flux_1410_MHz
Flux density at 1410 MHz, in milliJanskies.

Flux_178_MHz
Flux density at 178 MHz, in milliJanskies.

Flux_22000_MHz
Flux density at 22000 MHz, in milliJanskies.

Flux_2700_MHz
Flux density at 2700 MHz, in milliJanskies.

Flux_408_MHz
Flux density at 408 MHz, in milliJanskies.

Flux_5000_MHz
Flux density at 5000 MHz, in milliJanskies.

Flux_635_MHz
Flux density at 635 MHz, in milliJanskies.

Flux_80_MHz
Flux density at 80 MHz, in milliJanskies.

Flux_8400_MHz
Flux density at 8400 MHz, in milliJanskies.

Ident
Beginning with this version of the catalog, new identification and field classification codes have been used, mainly for the unidentified or "blank-field" sources. The following table lists both the new and the old codes.

   Code  Description                                        Old Code

  Identified Sources:
   BLC   BL Lacertae object                                   BLC
   D     Diffuse galaxy, bright galaxies in clusters          D
   DB    Double galaxy                                        DB
   E     Elliptical Galaxy                                    E
   G     Galaxy too faint to classify                         G
   HII   HII region                                           HII
   IRR   Irregular object                                     IRR
   N     N galaxy, bright cored galaxy                        N
   PN    Planetary Nebular                                    PN
   Q     Quasi-stellar object or Quasar (confirmed)           Q
   QC    Quasar with a continuous optical spectrum            QC
   S     Spiral galaxy                                        S
   SB    Barred Spiral galaxy                                 SB
   Sc    Spiral galaxy (type C)                               SC
   SNR   SuperNova Remnant                                    SNR
   S0    Spiral galaxy with ellipticity of zero               S0
          (nearly circular)
   *     Stellar object of neutral colour                     IIIS
          in good positional agreement with
          the radio source

  Unidentified Sources:
   Xg    one or more galaxies in the area                     II
          covered by the position error of the source
          but no identification claimed
   Xs    blank field: one or more stars of normal colour      III
          in the error box
   Xsa   blank field: obscured by absorption                  IIIA
   X     blank field: no absorption apparent                  IIIB
   Xs+   blank field: crowded star field                      IIIC
   Xa    blank field: heavily obscured.                       IV

  NOTE: a '?' following any code specifies that that property is uncertain.
  

Jname
The J2000 name of the Parkes source.

The J2000 names are given as:

       J1229+0203
  
where the letter signifies J2000 equinox and equator (FK5-type position), the next 4 digits are the hours and minutes of right ascension and the sign and final digits are the degrees and minutes of declination.

Thus, the source 3C273 in the new system will be referred to as: PKSB1226+023 or PKSJ1229+0203 if the observatory designation is important or, more informally, B1226+023 or J1229+0203

LII
The galactic longitude of the object.

Name
The name of the Parkes source.

Pos_Err
Positional accuracy in arcsec, to be read as `better than`.

RA
The Right Ascension of the object.

RA_1950
Right Ascension in 1950 coordinates.

Redshift
Redshift.

Ref_ID
Reference code for the identification.

Ref_Z
Reference code for the redshift.

Vmag
The magnitude of the source.


Contact Person

Questions regarding the PKSCAT90 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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