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Session 63 - Surveys of Galaxies.
Oral session, Thursday, January 08
Georgetown,
We will present preliminary results from an on-going deep K-band survey of 19 x-ray selected clusters of galaxies. The clusters are the most x-ray luminous clusters in the EMSS sample and range in z from 0.2 to 0.8. The image integrations are typically 12,000 seconds or more, and many were taken with the new tip-tilt secondary imaging system on the Hawaii 88 inch telescope. Many of these clusters act as gravitational lenses. When this survey is completed, we will determine a measure of the frequency of gravitational lensing as well as the optical-IR colors of the lensed objects.
