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 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 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Where objects fainter than 17m . 5 were suggested, position data of higher accuracy were available, due principally to unpublished measurements by Shimmins, Clarke, and Ekers with the 210 ft telescope.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 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 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 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.

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 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 Accurate Positions and Some Optical Identifications for 67 Radio Sources Between Declinations +20° and +27°

1968 ◽  
Vol 21 (4) ◽  
pp. 523 ◽  
Author(s):  
Jeannette K Merkelijn ◽  
AJ Shimmins ◽  
JG Bolton
Keyword(s):  
Radio Sources ◽  
Stellar Objects ◽  
Quasi Stellar Objects ◽  
Optical Identifications

Thirty-four identifications have been made from a total of 67 radio sources for which accurate positions have been measured with the 210 ft telescope. Nineteen of these are ga1a.:xies and 15 possible quasi-stellar objects. Only one of the identifications has been previously suggested.

scholarly journals Quasi Stellar Objects and Active Galactic Nuclei

1984 ◽  
Vol 78 ◽  
pp. 443-456
Author(s):  
C. Barbieri
Keyword(s):  
Active Galactic Nuclei ◽  
High Redshift ◽  
Galactic Nuclei ◽  
Radio Sources ◽  
Physical Processes ◽  
Stellar Objects ◽  
Sky Survey ◽  
Quasi Stellar Objects ◽  
The One

The role of the Schmidt telescopes in the discovery of the Quasi Stellar Objects and of the Active Galactic Nuclei, and in the understanding of their properties was and continues to be of the greatest importance. Thousands of Radio-Sources have been quickly associated to their optical counterparts thanks to the worldwide availability of the Palomar Observatory Sky Survey plates and charts and more recently of the films of the ESO B Survey. Other thousands of QSOs and AGNs devoid of radio emission are found by the large Schmidts nowaday in operation. This wealth of data give fundamental cosmological knowledge and insight in the physical processes occuring in these objects. I'll concentrate in this Review on two specific topics, namely on the discovery techniques and on the study of the optical variability. To both subjects, the 67/92 cm Schmidt telescope here at Asiago has made significant contributions. The first topic is treated in several excellent papers, such as the one by M. Smith (1978) and the one by P. Veron (1983); the material presented in the second part is largely new. In the following, I'll use rather loosely the terms QSOs and AGNs to designate a variety of objects including Quasars (those QSOs in catalogs of Radio-Sources), high-redshift compact galaxies with emission lines, BL LACset similia.

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