* '''Warning:''' During your start-off you will have been told about the grating instability problem. We applied a mechanical fix when the instrument is off the telescope in early April. This improved the situation, but did not completely resolve the issue - so until such time as we have eliminated the problem, we urge users to bracket all target observations with arcs (to be taken immediately before and after the object exposures) to minimise the impact of the declination-dependent movement of the grating.
* The angles listed in the second last column of the table below will get one into the range where lines are visible for a given grating, then adjust the grating angle to obtain the desired wavelength range - consult the arc maps in the right-hand column of the table, or see the ones in the old spectrograph user manual (a hard copy is available in the warm room). Click on the relevant links for sample spectra of specphot standard stars observed with G4, G5, G6 and G7.
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