Table name: PKS Records: 8263 Version: 1990 Spectral Band: RADIO Kind of Object: Radio Sources Mode: Redshift PreView: Coordinates: J2000
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 --- 22000 MHz.
A most important contibution to the usefulness of the catalogue has been the data from the Molonglo 408 MHz survey. Unfortunately the flux data at the highest frequencies remain sparse. However a programme of measurements at 8400MHz is underway at Parkes which will help remedy this deficiency.
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. The associated optical spectral data on which redshifts were obtained has also been published, mainly in the Astrophysical Journal and Monthly Notices of the Royal Astronomical Society.
Name Type Meaning bname c10 Old PKS designation (based on B1950 position) jname c10 New PKS designation (based on J2000 position) name c7 Other name type c4 Source classification (see below) mag F Magnitude (for sources with optical counterpart) r_a I J2000 Right Ascension dec I J2000 Declination e_pos F Positional accuracy in arcsec (to be read as "better than") z F Redshift when I Date (seconds since 1980) for which an optical spectrum was obtained, but a definite redshift could not be determined survey I Code for survey in which source was found f1 F Flux (Jy) at 80 MHz f2 F Flux (Jy) at 178 MHz f3 F Flux (Jy) at 408 MHz f4 F Flux (Jy) at 635 MHz f5 F Flux (Jy) at 1410 MHz f6 F Flux (Jy) at 2.7 GHz f7 F Flux (Jy) at 5.0 GHz f8 F Flux (Jy) at 8.4 GHz f9 F Flux (Jy) at 22 GHz Derived Values _ra F B1950 Right Ascension (epoch + equinox B1950) _de F B1950 Declination _lii F Galactic Longitude _bii F Galactic Latitude _L F SuperGalactic Longitude _B F SuperGalactic Latitude
Code Identified Sources BLC BL Lac object D Diffuse galaxy, bright galaxies in clusters DB Double Galaxy E Elliptical Galaxy (3 for ellipticity of 3) G Galaxy too faint to classify HII HII region IRR Irregular object (galaxy ? ) N N galaxy, bright cored galaxy PN Planetary Nebula Q Confirmed quasi-stellar object or Quasar QC Quasar with a continuous optical spectrum (similar to BLC) S Spiral Galaxy SB Barred Spiral Galaxy SC Spiral Galaxy (Sc) SNR Supernova Remnant S0 Spiral galaxy with ellitpicity of zero (nearly circular) IIIS Stellar object of neutral colour in good positional agreement with the radio source Code Unidentified Sources II one or more galaxies in the area covered by the position error of the source, but no identification claimed III blank field: one or more stars of normal colour in the error box IIIA blank field: obscured by absoption IIIB blank field: no absoption apparent IIIC blank field: crowded star field IV 1 blank field: heavily obscured