J/A+A/339/34 Bright galaxies from the WENSS minisurvey (de Ruiter+ 1998)
Bright galaxies from WENSS. I The minisurvey
de Ruiter H.R., Parma P., Stirpe G.M., Perez-Fournon I.,
Gonzalez-Serrano I., Rengelink R.B., Bremer M.N.
<Astron. Astrophys. 339, 34 (1998)>
=1998A&A...339...34D 1998A&A...339...34D (SIMBAD/NED BibCode)
ADC_Keywords: Radio sources ; Galaxies, photometry ; Redshifts
Keywords: galaxies: distances and redshifts - radio continuum: galaxies
Abstract:
A search for bright galaxies associated with radio sources from the
Westerbork Northern Sky Survey (WENSS) minisurvey has been carried
out. A galaxy counterpart was found for 402 of almost 10,000 radio
sources. Of these a radio and optically complete sample, with a flux
density limit at 325MHz of 30mJy and a limiting red magnitude of 16,
can be constructed, which contains 119 galaxies. This paper is the
first step of a more general study, in which we aim to derive a bright
galaxy sample from the entire WENSS survey (which is now available in
the public domain) and thus to construct practically definitive local
radio luminosity functions of elliptical and spiral galaxies. We
briefly describe the WENSS minisurvey, and the steps that are needed
for the optical identification of its radio sources. Due to the large
numbers of sources involved (over 200,000) completely automated
procedures are obviously needed and we discuss these in some detail.
It is shown that with modern utilities projects as described here have
become quite feasible. Some results (e.g. a preliminary determination
of the local radio luminosity function) are presented.
File Summary:
--------------------------------------------------------------------------------
FileName Lrecl Records Explanations
--------------------------------------------------------------------------------
ReadMe 80 . This file
table1.dat 83 402 The minisurvey bright galaxy sample
--------------------------------------------------------------------------------
See also:
J/A+AS/124/259/ Westerbork Northern Sky Survey I. (Rengelink+ 1997)
Byte-by-byte Description of file: table1.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
2- 6 I5 --- Seq Running number from minisurvey
8- 19 A12 --- IAUname IAU name of radio source (1)
21- 27 F7.1 mJy Speak Peak flux density of radio source
29- 35 F7.1 mJy Stot Total flux density of radio source
37- 49 A13 --- Oname Optical catalogue name (2)
51 A1 --- Otype [ES?] Galaxy type
53- 57 F5.2 mag Rmag Red magnitude of the galaxy
59- 64 F6.4 --- z ? Redshift of the galaxy
65 A1 --- n_z [*] *: new redshift
67- 71 F5.1 arcsec DRA Right ascension difference (radio minus optical)
73- 77 F5.1 arcsec DDE Declination difference (radio minus optical)
79- 83 F5.2 --- SI ? Spectral index (325-1400MHz)
--------------------------------------------------------------------------------
Note (1): Names in the form WNBhhmm+ddmm; WN hhmm+ddmm in Simbad
Note (2): ZWG nnn.0nn = Z nnn - nn in Simbad
7 ZW nnn = ZW VII nnn in Simbad
--------------------------------------------------------------------------------
Acknowledgements: Hans de Ruiter
(End) Patricia Bauer [CDS] 14-Aug-1998