scholarly journals Identification Of Strong Extragalactic Radio Sources In The Declination Zone 0° To -20°

1966 ◽  
Vol 19 (4) ◽  
pp. 559 ◽  
Keyword(s):  
Radio Sources ◽  
Stellar Objects ◽  
Extragalactic Radio Sources ◽  
Sky Survey ◽  
Quasi Stellar Objects

Identifications are proposed for 71 extragalactic radio sources between declinations 0� and ?20�. The identifications, which comprise 37 galaxies and 34 possible quasi-stellar objects, resulted from inspection of the 48 in. Sky Survey prints in the positions of 113 sources.

scholarly journals Identification of Extragalactic Radio Sources Between Declinations ?20° and ?44°

1965 ◽  
Vol 18 (6) ◽  
pp. 627 ◽  
Author(s):  
JG Bolton ◽  
Margaret E Clarke ◽  
RD Ekers
Keyword(s):  
Radio Sources ◽  
Stellar Objects ◽  
Extragalactic Radio Sources ◽  
Sky Survey ◽  
Quasi Stellar Objects

Identifications with extragalactic objects are suggested for 55 radio sources with declinations between _200 and _44�. The identifications are based on a search of the Palomar Sky Survey plates in the position of sources in the Parkes catalogue. Eight of the identifications are with suspected quasi-stellar objects and the remainder with galaxies. Finding charts are provided for the fainter obje~ts.

scholarly journals Identification Of Extragalactic Radio Sources Between Declinations 0° And +20°

1966 ◽  
Vol 19 (3) ◽  
pp. 375 ◽  
Keyword(s):  
Radio Sources ◽  
Galactic Latitude ◽  
Radio Luminosity ◽  
Stellar Objects ◽  
Extragalactic Radio Sources ◽  
Sky Survey ◽  
Quasi Stellar Objects

Identifications or suggested identifications are given for 138 extragalactic radio sources in the declination zone 0� to +20�. The identifications are based on a search of the Palomar Sky Survey plates in the positions of sources in the Parkes catalogue. Forty-two of the identifications are with quasi. stellar objects or suggested quasi-stellar objects and the remainder with galaxies. The radio luminosity distribution and a possible variation in the identification percentage with galactic latitude are discussed.

scholarly journals Suggested Identifications for Weak Extragalactic Radio Sources Between Declinations 0° and ?20°

1967 ◽  
Vol 20 (1) ◽  
pp. 109 ◽  
Author(s):  
JG Bolton ◽  
Jennifer Ekers
Keyword(s):  
Radio Sources ◽  
Stellar Objects ◽  
Extragalactic Radio Sources ◽  
Sky Survey ◽  
Quasi Stellar Objects

Sixty-eight identification" are suggested from inspection of the Palomar Sky Survey prints in the positions of 262 weak radio sources between declinations 0� and _20�. Forty-seven of the suggested identifications are galaxies and 21 possible 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 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 Populations of Extragalactic Radio Sources

1994 ◽  
Vol 47 (5) ◽  
pp. 625 ◽  
Author(s):  
JV Wall
Keyword(s):  
Big Bang ◽  
Current View ◽  
Radio Sources ◽  
Large Area ◽  
Microwave Background ◽  
Stellar Objects ◽  
Sky Surveys ◽  
Extragalactic Radio Sources ◽  
The Face ◽  
Quasi Stellar Objects

In the late 1950s and early 1960s, radio sky surveys were the centre of an intense and public debate-Big-Bang versus Steady-State cosmology-the arguments revolving about source counts and statistical interpretations in the face of instrumental complications. The 1965 discovery of the microwave background took the fire from the debate, but left the momentum in place for large-area radio surveys at different frequencies, and for extensive identification/redshift-measurement programs. By the 1970s the data enabled us to start disentangling the different populations of extragalactic radio sources. We could refine our taxonomy, and we could view the possibility of delineating individual cosmic histories and evolutions. We could at least describe a goal to elucidate the birth-life-death cycles of the objects involved [quasi-stellar objects (QSOs) and radio galaxies: together the 'active galactic nuclei' (AGNs)] whose unaccountably prodigious energies somehow produce the beautifully aligned radio structures with which we are now familiar. One part of John Bolton's vision to see how distorted a view of the AGN universe the original long-wavelength surveys provided. One legacy is thus the 'short-wavelength survey' for extragalactic radio sources, which has done so much to balance our picture of the radio sky. And indeed the legacy continues in the form of the immense sky surveys at present under way, complete with their sub-industries of radio-positioning and identification. From these, yet further results are emerging on spatial distribution and the skeleton structure of the universe. It is the purpose of this paper to outline something of this current view of the populations, their differences, similarities and unifying concepts.

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

1968 ◽  
Vol 21 (6) ◽  
pp. 903 ◽  
Author(s):  
Jeannette K Merkelijn
Keyword(s):  
Radio Sources ◽  
Stellar Objects ◽  
Sky Survey ◽  
Quasi Stellar Objects ◽  
Estimated Error

Accurate 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.

scholarly journals New Optical Identifications from the Fourteenth Part of the Parkes 2700 MHz Survey: Declinations ?4° to ?15°, Right Ascensions 10h to 15h

1979 ◽  
Vol 32 (4) ◽  
pp. 415
Author(s):  
Ann Savage ◽  
JG Bolton
Keyword(s):  
Radio Sources ◽  
Stellar Objects ◽  
Sky Survey ◽  
Quasi Stellar Objects ◽  
Optical Identifications

Identifications are suggested for 36 radio sources from a survey of 0�247 sr of the southern sky, 14 with galaxies and 22 with possible quasi-stellar objects. The identifications were made from prints of the Palomar Sky Survey.

scholarly journals Identification of Two Southern Quasi-stellar Objects

1965 ◽  
Vol 18 (6) ◽  
pp. 669 ◽  
Author(s):  
RD Ekers ◽  
JG Bolton
Keyword(s):  
Radio Sources ◽  
Radio Telescopes ◽  
Stellar Objects ◽  
Precise Position ◽  
Sky Survey ◽  
Quasi Stellar Objects ◽  
Photoelectric Observations

A number of possible quasi-stellar objects have been found from a search of the Palomar Sky Survey plates for identification of radio sources in the Parkes catalogue (Bolton, Clarke, and Ekers 1965). Confirmation of the identification of two of these sources, 1327-21 and 2115-30, has now been obtained from both precise position measurements and photoelectric observations. As quasi-stellar objects generally are of very small radio diameter, the optical positions can be used as primary calibration points for southern radio telescopes.

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