Optical identifications of radio sources from the Molonglo deep surveys. I - The declination -20 deg portion of the first deep survey

Details Optical identifications of radio sources from the Molonglo deep surveys. I - The declination -20 deg portion of the first deep survey Optical identifications of radio sources from the Molonglo deep surveys. I - The declination -20 deg portion of the first deep survey

Aug 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987mnras.227..607w&link_type=abstract

Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 227, Aug. 1, 1987, p. 607-622. Research supported by th

Astronomy and Astrophysics

Astronomy

1

Astronomical Spectroscopy, Radio Sources (Astronomy), Visible Spectrum, Magnitude, Photographic Plates, Quasars, Sky Surveys (Astronomy)

Scientific paper

Optical identifications have been sought for 304 radio sources from the declination -20 deg region of the first Molonglo deep survey. Optical objects have been measured using the Palomar sky survey to an accuracy of 1 arcsec and magnitude estimates are to 0.4 mag. Finding charts are given for all fields with optical objects within + or - 2 sigma of the radio position. Sixteen QSOs have been confirmed (details have been reported elsewhere) amongst the blue stellar-like objects and spectroscopy is complete to m(o) = 19.5. The mean magnitude of the QSOs is 19.2 and the mean redshift is 1.34. A study of the background densities of objects indicates that about half of the remaining blue stellar-like objects are QSOs and about 80 percent of the galaxies are associated with the radio emission. The QSOs are amongst the fainter and the bluer of the blue stellar-like objects. There is no evidence for any average offset between the radio and optical positions.

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