Image-tube photography of a complete sample of 4C radio sources

Details Image-tube photography of a complete sample of 4C radio sources Image-tube photography of a complete sample of 4C radio sources

Nov 1976

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1976aj.....81..905u&link_type=abstract

Astronomical Journal, vol. 81, Nov. 1976, p. 905-912.

Astronomy and Astrophysics

Astronomy

31

Astronomical Catalogs, Astronomical Photography, Luminous Intensity, Quasars, Radio Sources (Astronomy), Histograms, Red Shift, Sky Surveys (Astronomy), Variability

Scientific paper

Image-tube photographs have been obtained in the fields of over 200 4C radio sources. The incidence of highly variable QSOs is much lower than that found among objects in higher-frequency radio surveys; none of the 130 fields which were blank to about 20 mag at the epoch of the Palomar Sky Survey (1950-1956) now contains an object not exceeding 19.5-20 mag, and of the 35 known QSOs in the sample, only about one-third show a change greater than 0.2 mag since the Sky Survey. There is a negative correlation between the amount of variability and the absolute optical luminosity of the QSOs. Optical identifications for a uniform sample of 232 4C sources are summarized; they include some new ones made as a result of this study.

Affiliated with

Also associated with

No associations

Rating

Image-tube photography of a complete sample of 4C radio sources does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Image-tube photography of a complete sample of 4C radio sources, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Image-tube photography of a complete sample of 4C radio sources will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1724804