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April 1999

Gravitational Lensing at April Meeting

by George Best
April Meeting

Chris Stubbs
Associate Professor
of Astronomy

Wednesday, April 21
7:30 p.m.

A-102 Physics-Astronomy Building
University of Washington

Come early at 7 p.m. to visit
with your fellow members.

Bring your slides for after
the program.

Our April 21 speaker is Chris Stubbs, Associate Professor of Astronomy at the University of Washington (UW), who studies the gravitational lensing of stars in the Magellanic Clouds and the center of the our galaxy. Chris' work involves the study of dark matter, which causes lensing. He does this work at the Great Melbourne Telescope at Mt. Stromlo in Australia, where he has developed state-of-the art instrumentation for this purpose.

In addition, his research group recently received a $1.5 million research grant to build a wide-field camera system for the Apache Point Observatory in New Mexico.

This instrument will be used for studing gravitational lensing in the northern skies and monitoring distant supernovae to map out the evolution of the geometry of the universe. Because he is a telescope scientist, he is working to improve the performance of the Apache Point 3.5-meter telescope.

Chris developed instrumentation at Lowell Observatory for searching for Earth-crossing asteroids, supernovae, and RR Lyrae variable stars. The April 21 Seattle Astronomical Society (SAS) meeting will held at 7:30 p.m. Physics-Astronomy Building, room A102, on the UW campus.

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