Accurate Positions and Identifications of 75 Radio Sources Between Declinations +20º and +27º

Abstract

SummaryAccurate positions have been obtained for 75 sources between declinations +20° and +27°. For most sources the estimated error is less than 15" arc in each coordinate. Identifications are suggested for 27 sources from inspection of the Palomar Sky survey prints near the new positions. Fourteen of the suggested identifications are galaxies and 13 are quasi. stellar objects.

The Linear Polarization of Radio Sources at 6 cm Wavelength

“…References for many of the identifications and redshifts were given previously . Additional information is from Bolton, Kinman, and Wall (1968), Bolton (personal communicatio n), Merkelijn (1968Merkelijn ( , 1969, Searle andWesterlund and. Column 9 gives the classification as scintillator (SC) and nonscintillator (N) from Whiteoak (unpublished data) and Cohen, Gundermann, and Harris (1967).…”

Accurate Positions and Some Optical Identifications for 255 Radio Sources Between Declinations +20° and ?33°

“…The work described in this paper is part of a programme in which more accurate positions were determined for all sources in the Parkes catalogue for which identifications have been suggested or appear possible from their catalogue positions. The results for the +20° to +27° declination zone have appeared in a previous paper (Merkelijn 1968).…”

Improved Positions and Some Identifications for 108 Radio Sources Between Declinations ?33° and +27°

“…The methods of observation and reduction have been described in detail by Merkelijn (1968). The observa.tions consisted of pairs of forward and reverse scans through the source in each coordinate.…”

“…The sources were selected for the present measurements so as to produce samples that were complete to chosen limits at the catalogue survey frequencies of 408 MHz (for declinations -33° to +20°) and 635 MHz (for declinations +20° to +27°). These samples were required for the construction of a luminosity function for radio galaxies (Merkelijn 1971). Observations were made of 108 sources withS408 > a•5f.u.t orS635 > 2•0f.u.…”

“…(3) * References: 1, Clarke, Bolton, and Shimmins (1966); 2, Shimmins, Clarke, and Ekers (1966); 3, Wills and ; 4, Merkelijn (1969); 5, object originally accepted as identification by Wills and Bolton (1969) is a galactic star (Bolton, personal communication); 6, identification as QSO confirmed by Shimmins et al (1970); R, previous identification retracted.…”