scholarly journals Observations of the Linear Polarization of Radio Sources at 6 cm Wavelength

1968 ◽  
Vol 21 (4) ◽  
pp. 493 ◽  
Author(s):  
D Morris ◽  
JB Whiteoak
Keyword(s):  
Linear Polarization ◽  
High Frequency ◽  
Wavelength Dependence ◽  
Radio Galaxies ◽  
Short Wave ◽  
Radio Sources ◽  
Polarization Data ◽  
Stellar Objects ◽  
Quasi Stellar Objects

The polarizations of 45 sources have been measured at 6 cm wavelength and have been compared with values obtained at longer wavelengths. The resulting wavelength dependence has been studied in relation to the spectra of the sources. For the quasi. stellar objects in particular, polarization features at short wave� lengths are associated with the young components of the source which radiate at high frequency. However, it is not possible to distinguish between radio galaxies and quasi-stellar objects solely on the basis of polarization data.

Erratum: Optical Positions of 25 Quasi-Stellar Objects and Radio Galaxies

1968 ◽  
Vol 152 ◽  
pp. L77
Author(s):  
Phillip K. Lü ◽  
Laurence W. Fredrick
Keyword(s):  
Radio Galaxies ◽  
Stellar Objects ◽  
Quasi Stellar Objects

scholarly journals Radio Emission from Compact Objects

1972 ◽  
Vol 44 ◽  
pp. 190-213
Author(s):  
K. I. Kellermann
Keyword(s):  
Angular Size ◽  
Brightness Distribution ◽  
Compact Objects ◽  
Radio Sources ◽  
Stellar Objects ◽  
Large Intensity ◽  
Quasi Stellar Objects ◽  
One Year ◽  
Ngc 1275 ◽  
Compact Sources

Compact radio stars are associated with both galaxies and quasi-stellar objects; and there appears to be no way to distinguish between the radio galaxies and the quasi-stellar radio sources from their radio properties alone.The compact radio sources are opaque at the longer radio wavelengths and have spectra that are either peaked or complex. They have a complex brightness distribution and often contain components less than 0.001 arc sec in size.Many of the compact sources show large intensity variations and in NGC 1275 there is evidence for a change in the angular size during one year.

scholarly journals The Parkes 2700 MHz Survey (Tenth Part). Supplementary Catalogue for the Declination Zone +4° to +25°

1975 ◽  
Vol 28 (2) ◽  
pp. 239
Author(s):  
AJ Shimmins ◽  
JG Bolton ◽  
JV Wall
Keyword(s):  
Flux Density ◽  
Galactic Plane ◽  
Radio Sources ◽  
Stellar Objects ◽  
Quasi Stellar Objects

A catalogue of lSI radio sources is presented covering the declination zone +4� to +25� and all right ascensions, omitting two regions within approximately 10� of the galactic plane (R.A. 05h30'" to 07ho()m and R.A. lShOO'" to 2Oh30"'). The catalogue was compiled from a 'fast' finding survey at 2700 MHz aimed at detecting sources stronger than o� 5 Jy. Subsequently, measurements of accurate flux density and position were made on all the sources which were not in the Parkes 40S MHz catalogue and on a few sources in the 40S MHz catalogue for which only data of low accuracy were available. The' positions of sources were determined to an accuracy of 10" arc r.m.s. in both coordinates. Flux densities for most of the sources were also measured at 5009 MHz. Identifications are suggested for 17 galaxies and 62 quasi-stellar objects.

scholarly journals Further Identifications Of Radio Sources Between Declinations 0° And 20°

1966 ◽  
Vol 19 (3) ◽  
pp. 471 ◽  
Keyword(s):  
Radio Sources ◽  
Stellar Objects ◽  
Sky Survey ◽  
Position Data ◽  
Quasi Stellar Objects

Clarke, Bolton, and Shimmins (1966) have recently suggested identifications for 138 of the radio sources listed in the Parkes catalogue for declinations 0� to +20� (Day, Shimmins, Ekers, and Cole 1966). The identifications were made from inspection of the Palomar Sky Survey plates in areas 2' arc square centred on the catalogue positions. In general, identifications were suggested only for galaxies or possible quasi-stellar objects brighter than 17m . 5, in order to avoid the possibility of chance coincidences. Where objects fainter than 17m . 5 were suggested, position data of higher accuracy were available, due principally to unpublished measurements by Shimmins, Clarke, and Ekers with the 210 ft telescope.

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

1969 ◽  
Vol 22 (2) ◽  
pp. 237 ◽  
Author(s):  
Jeannette K Merkelijn
Keyword(s):  
Radio Sources ◽  
Stellar Objects ◽  
Quasi Stellar Objects ◽  
Optical Identifications

Accurate positions have been measured at 2700 MHz for 255 sources from the Parkes catalogue between declinations +20� and -33�. The estimated accuracy in both coordinates is approximately 15N arc. For 103 of the sources, identifications are suggested using the accurate positions. Sixty-two of the sources are identified with galaxies and 41 with quasi-stellar objects.

scholarly journals New Optical Identifications from the Parkes 2700 MHz Resurvey of the ± 4° Declination Zone

1982 ◽  
Vol 35 (2) ◽  
pp. 207 ◽  
Author(s):  
Ann Savage ◽  
JG Bolton ◽  
Jenny Trett
Keyword(s):  
Radio Sources ◽  
Stellar Objects ◽  
Sky Survey ◽  
Quasi Stellar Objects ◽  
Optical Identifications

Identifications are suggested for 59 radio sources from the resurvey of declination zone �4�, 27 with galaxies and 32 with stellar objects; 19 of the latter are confirmed as quasi-stellar objects (QSOs). The identifications were made from the Palomar Sky Survey prints plus supplementary plates taken with the Palomar and U.K. Schmidt telescopes and the Anglo-Australian 3�9 m telescope.

scholarly journals Wild, Woolley and Savage ? or how John Bolton and I went hunting for Quasars and QSOs

1994 ◽  
Vol 47 (5) ◽  
pp. 589
Author(s):  
Ann Savage
Keyword(s):  
Radio Sources ◽  
Stellar Objects ◽  
Quasi Stellar Objects

This paper is about how I met John Bolton and includes some highlights of the four years I took compiling my Ph.D. at the Parkes Observatory. It is strongly linked to the discovery of quasars (quasi-stellar radio sources) and QSOs (quasi-stellar objects, not necessarily radio sources)-John being dedicated to discovering quasars and I to discovering QSOs. I hope my perception of John Bolton as a person comes through as it seems I was fortunate in meeting him at a time when, according to some, he had mellowed!

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