AAOmega Focus Database
A database of previous AAOmega focus values, for various gratings and
central wavelengths, is kept. There is a simple but powerful GUI which provides the user with access to the focus
information when setting up an unusual AAOmega configuration.
The utility
currently runs on aatlxx
at the AAT. Those computers do not have
general user accounts, log-in as aatinst. . Ask your night assistant if you do not know the password.In the top level directory, start the GUI with ./aaomega_focus.p Enter the appropriate information for you desired
setup and hit Get Values. A list of previous focus values which match the input
selection will appear. Typically one should choose the most
recent values with the closest wavelength settings. Note the temperature correction which can accurately
be applied to correct for seasonal variations. Use the
Spectrograph temperature in making this adjustment. The system should now be close enough to focus that the
Hartmann Shutter routine will quickly pull the spectrographs into a
good focus.
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Sarah Brough (sb@aao.gov.au)
