NOT GL survey of multiply imaged quasars (Jaunsen+, 1995)

Details NOT GL survey of multiply imaged quasars (Jaunsen+, 1995) NOT GL survey of multiply imaged quasars (Jaunsen+, 1995)

Feb 1995

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995ycat..33000323j&link_type=abstract

VizieR On-line Data Catalog: J/A+A/300/323. Originally published in: 1995A&A...300..323J

Computer Science

Qsos, Gravitational Lensing, Photometry, Colors, Spectroscopy, Redshifts

Scientific paper

A gravitational lens (GL)-search program, initiated in 1990 at the Nordic Optcal Telescope (NOT), has revealed several possible GL-candidates among a sample of 168 quasars (QSOs), chosen from three lists compiled by C. Hazard, D. Reimers and J. Surdej, respectively. Some of these candidates, selected for having close companions (within 5 arcseconds), were imaged in several filters and their colours compared. Low dispersion spectra of the most promising candidates were also obtained at the NOT and ESO New Technology Telescope (NTT). None of these has proved to be strong candidates of gravitational lensing effects. We present this new sample of QSOs and combine it with previously published optical QSO samples in a statistical analysis to yield constraints on flat cosmologies and galaxy velocity dispersions. (1 data file).

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