New Gravitational Lens Candidates from VLA snapshots of MG and PMN radio sources

Details New Gravitational Lens Candidates from VLA snapshots of MG and PMN radio sources New Gravitational Lens Candidates from VLA snapshots of MG and PMN radio sources

Dec 1995

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995aas...18711705f&link_type=abstract

American Astronomical Society, 187th AAS Meeting, #117.05; Bulletin of the American Astronomical Society, Vol. 27, p.1449

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The four 4.85 GHz MIT-Greenbank (MG) surveys together revealed 20,344 radio sources over 5.0 steradians (-0.deg5 10deg ), down to a limiting flux density of S_{4.85} ~ 41 mJy. The 4.85 GHz Parkes-MIT-NRAO (PMN) Southern survey lists 23,277 sources over 2.5 steradians (-87.deg5 10deg ), down to S_{4.85} ~ 35 mJy, while the Tropical and Equatorial surveys (-29deg 10deg ) together give 25,137 sources over 3.9 steradians, down to S_{4.85} ~ 40 mJy. The estimated completeness for each of these surveys is >93%, while their reliabilities are >90%. Over the past 15 years, the MIT group has been imaging flux-limited samples of these sources with the VLA, at 4.85 and 8.43 GHz. One of our goals is to find new instances of gravitational lensing, and another is to systematically study the radio and optical properties of radio-loud AGN. We now have VLA snapshots of ~ 6500 MG and ~ 2000 PMN sources. The initial 1980's 4.85 GHz imaging attempt on MG sources found 5 bona fide lenses: MG 2016 (triple), MG 1131 (ring), MG 0414 (quad), MG 1654 (ring), MG 1549 (ring). From the 1990's 8.43 GHz effort, we present 5 new examples of gravitational lens candidates: MG 0248 (ring?), MG 1011 (triple?), PMN 1254 (quad?), PMN 1542 (quad?) and PMN 0837 (ring?). We have also found ~ 120 ``close'' double-lobed radio galaxies (0.''25

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