Abstract
Images of 104 quasars with z ≥ 1.5 were obtained from CFHT with a median seeing of FWHM 0 ″. 7. The data are used to search for closely-spaced gravitational lens systems. Preliminary analysis indicates that we have not found any new systems with sub-arcsecond separations and components having a magnitude difference of ≤ 1.5 mag. Galaxy count statistics around 94 quasars with photometric data are analysed. Within radii of 6″, 10″, and 15″, and down to a Gunn r magnitude of 23, we find no significant enhancement of galaxy density over the background counts.
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© 1992 Springer-Verlag
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Yee, H.K.C., Filippenko, A.V., Tang, D. (1992). A high-resolution imaging survey for gravitational lenses. In: Kayser, R., Schramm, T., Nieser, L. (eds) Gravitational Lenses. Lecture Notes in Physics, vol 406. Springer, Berlin, Heidelberg. https://doi.org/10.1007/3-540-55797-0_84
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DOI: https://doi.org/10.1007/3-540-55797-0_84
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