Astronomy and Astrophysics – Astronomy
Scientific paper
Dec 1982
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982mnras.201..957p&link_type=abstract
Monthly Notices of the Royal Astronomical Society, vol. 201, Dec. 1982, p. 957-973. Research supported by the Science and Engin
Astronomy and Astrophysics
Astronomy
11
Charge Coupled Devices, Optical Emission Spectroscopy, Radio Sources (Astronomy), Stellar Spectrophotometry, Astrometry, Astronomical Catalogs, Astronomical Models, Normal Density Functions, Photographic Plates, Quasars, Red Shift, Spectral Resolution, Stellar Evolution
Scientific paper
An optical survey was conducted of the fields of 34 faint radio sources belonging to two samples that are complete to 15 mJy at 1407 MHz and 55 mJy at 408 MHz. Sources which had not been previously identified on IIIa-J plates were observed with the Hale 5-m telescope using a CCD detector, whose broadband r exposures of 5-min duration reach an estimated limiting magnitude of 23 mag. Success rates in new identifications are 30 and 35% for the low and high frequency samples, respectively. Half of the sources which remained unresolved at 2-arcsec resolution now have reliable optical counterparts, and at least half of these identifications appear to be galaxies. These identification statistics are consistent with the multifrequency models of radio source evolution given by Peacock and Gull (1981).
Allington-Smith Jeremy R.
Fielden J.
Longair Malcolm S.
Perryman Michael . A. C.
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