CCD Queue Imaging of New Parkes-MIT-NRAO Gravitational Lens Candidates

Details CCD Queue Imaging of New Parkes-MIT-NRAO Gravitational Lens Candidates CCD Queue Imaging of New Parkes-MIT-NRAO Gravitational Lens Candidates

Feb 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999noao.prop..395f&link_type=abstract

NOAO Proposal ID #1999A-0395

Astronomy and Astrophysics

Astronomy

Scientific paper

(This is essentially a slightly modified RESUBMISSION of accepted CTIO proposal N0428, submitted by us in March 1998. The current proposal is to complete our RA coverage for Spring 1999 targets). The MIT radioastronomy group has isolated a new crop of lens candidates from the 1990s VLA imaging of MIT-Greenbank and Parkes-MIT-NRAO radio sources. We propose to finish collecting optical images of 29 PMN lens candidates this coming Spring season. We desire imaging down to a uniform limiting magnitude of ~ 22, in seeing better than ~ 1.''5. These data would be a marked improvement on the limited sensitivity and resolution available in the Digitized Sky Survey images. The efficiency and convenience of the new YALO 1.0m CCD imaging queue is well suited to the next step in our procedure for separating out the true lenses from the rest of our candidates, and issues of sensitivity and resolution are paramount in deciding for or against the lens hypothesis for each individual case. With an expected yield of about 3 bona fide lenses from the original VLA sample of 1800 sources, the investment of just a further 3 hours of YALO 1.0m time for the current season is a necessary but small price to pay for the expected eventual return.

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