Physics
Scientific paper
Jul 1991
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991hst..prop.2350t&link_type=abstract
HST Proposal ID #2350
Physics
Hst Proposal Id #2350
Scientific paper
WF/PC broad band imaging of ten specific systems believed to be gravitational lenses on the basis of existing observations and of 37 objects divided among five categories of quasars in which lensing might be very common is proposed. Observations of objects in the first category (i.e., lens candidates) would consist of images in two bands (F555W and F785LP) and have the goals of further testing the lens hypothesis for each system, of allowing very accurate measurement of the relative positions of the multiple source images and the lensing object(s), of revealing details of the lensing object's structure, of identifying additional source images and/or lensing objects, and of resolving possibly magnified source images. Proposed observations in the second category (i.e., search for new lens candidates) would consist of images in a single band (F555W or F702W) and have the goal of searching for evidence of lensing, either multiple source images or nearly superimposed foreground galaxies and/or galaxy clusters. This second imaging program may be thought of as a series of mini-surveys for new lens systems, each exploring a potential high yield search strategy. The proposed observations exploit the potential of HST's high angular resolution for gravitational lens studies and would play a central role in a multi-investigator, multi-institutional effort which is already underway using ground based optical and radio observations plus theoretical investigations. This larger program is ultimately aimed at utilizing
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