IntroductionThe Kast Double Spectrograph is used at the cassegrain focus of the Shane 3-m Telescope. It is two separate spectrographs - one optimized for the red, the other for blue - housed in a single structure and having some components in common. Each side offers a selection of dispersive elements for various resolutions and dispersions, and both are also capable of direct imaging over a limited field. Dichroic beamsplitters and separate CCD detectors allow simultaneous observations in red and blue. Both sides are operated from a single interface. A polarimeter is also available for spectropolarimetry observations.
The Red side 600/5000 and 600/7500 gratings have been replaced with brand new gratings. Throughput should be higher as the old gratings were somewhat scratched and damaged due to age.
Follow these links to: 3-m Time Allocation Policy
Observing Time Request Forms All new users must be checked out by a resident astronomer on their first night. Please request support on your time application. Please direct questions to a Mount Hamilton support astronomer, email@example.com.