A Survey of Gravitational Lenses as Cosmological Tools III

Details A Survey of Gravitational Lenses as Cosmological Tools III A Survey of Gravitational Lenses as Cosmological Tools III

Jul 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999hst..prop.8175f&link_type=abstract

HST Proposal ID #8175

Astronomy and Astrophysics

Astronomy

Hst Proposal Id #8175 Clusters Of Galaxies And Lensing

Scientific paper

Gravitational lenses are powerful tools for studying cosmology, galactic structure, and galaxy evolution. Such studies require large, uniform sets of photometric observations and must be conducted from space because typical image separations are 1". CASTLES { CfA- Arizona- Space- Telescope- LEns- Survey} is an ongoing survey of known lensed systems. Some of its goals are: to create a complete, uniform high-resolution photometric sample of the known galaxy-mass lenses; to obtain redshift estimates for all lens galaxies which lack spectroscopic redshifts; to find any source or lens components that have escaped detection and determine their photometric properties; to obtain precise astrometric data for all source components to improve lens models and estimates of H_0; and to investigate the wide field environments of the lens galaxies and their role in lensing. We propose to obtain WFPC2 V and I images of the 14 new lens systems discovered after previous CASTLES proposals; to re-image 13 lens systems with inadequate non-CASTLES observations; to image 2 systems that were excluded from CASTLES due to orbit cutbacks; and to obtain WFPC2 I images of 5 binary quasars. We again would waive any proprietary period for our data.

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