HST Imaging of Gravitational Lenses

Details HST Imaging of Gravitational Lenses HST Imaging of Gravitational Lenses

Jul 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001hst..prop.9133f&link_type=abstract

HST Proposal ID #9133

Physics

Hst Proposal Id #9133 Cosmology

Scientific paper

Gravitational lenses offer unique opportunities to study cosmology, galactic structure, galaxy evolution, quasar hosts and extinction. They are also the only sample of galaxies selected on the basis of their mass rather than their luminosity or surface brightness. While gravitational lenses can be discovered with ground-based optical and radio observatories, converting them from curiosities into scientific tools requires HST. With typical image separations of ~ 1", HST is the only instrument that can in each case precisely locate the lens galaxy, measure its luminosity, color and structure and search for lensed images of the source host galaxy. We will obtain WFPC2 V and I images of new lenses lacking any HST observations and filt lenses where observations in one of these two standard filters is missing. We will reobserve bad lenses for which existing HST data are not quantitatively useful. We also propose to observe disc lenses which will be discovered during the course of Cycle 10. As in previous cycles, we request that the data be made public immediately.

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