Astronomy and Astrophysics – Astronomy
Scientific paper
Feb 1975
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1975mnras.170p..31a&link_type=abstract
Monthly Notices of the Royal Astronomical Society, vol. 170, Feb. 1975, p. 31P-34P.
Astronomy and Astrophysics
Astronomy
2
Microwave Emission, Quasars, Radiant Flux Density, Radio Sources (Astronomy), Emission Spectra, Microwave Interferometers, Reference Stars, Sky Surveys (Astronomy), Stellar Spectra
Scientific paper
Observations made at NRAO, Greenbank, at a wavelength of 3.7 cm of a source in Cygnus revealed a flux variation from 2.2 to 6.3 Jy during 1973. Although the field was very crowded because of the low galactic latitude, accurate radio and optical position measurements have yielded a provisional identification with a blue stellar object which had a magnitude of 19.5 on the Sky Survey. The identification is confirmed by recent optical observations showing that the object had brightened to 18.5 by 1973 November. A spectroscopic examination has revealed an emission feature near 4300 A, and the object is almost certainly a quasar.
Adgie R. L.
Palmer Henry P.
Penston Michael V.
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