Pre-Observing	Observing	Post-Observing
Follow this link for information about pre-observing activities: proposal preparation, mask design and submission, pre-run activities, etc.	Follow this link for information about your observing run: instrument and telescope setups, scripts, software, procedures, etc.	Follow this link for information about your post-observing activities: backups, comment forms, data reduction, etc.
Troubleshooting	Technical Pages	Index
Trouble Shooting pages and links.	Portal to the technical pages: for the initiated only!	A listing of the instrument pages.

DEIMOS (DEep Imaging Multi-Object Spectrograph) is a visible-wavelength, faint-object, multi-slit imaging spectrograph in operation at the Nasmyth focus of the Keck II telescope since 2002. DEIMOS was designed and built at UCO/Lick Observatory under the leadership of Principal Investigator Sandra M. Faber and Project Manager Dave Cowley. Notable features of DEIMOS include:

generous slit length spanning 16.6 arcmin on sky (vs. 8 arcmin for LRIS)
large 8k×8k detector mosaic featuring eight MIT/Lincoln Labs CCDs
advanced, closed-loop flexure compensation system achieving image stability of ±0.25 px over 360° of instrument rotation
wide spectral coverage (up to 5000 A per exposure)
high spectral resolution (up to R≈6000)
high throughput
convenient IDL-based data reduction pipeline

Available observing modes include direct imaging, long-slit spectroscopy, and multi-slit spectroscopy of 100+ resolved targets per mask in conventional mode or 1000+ point-source targets per mask with narrow-band filters.

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