* 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 following link for <big>'''[[sample spectra Sample Spectra of spectro-photometric standard starsSpectrophotometric Standard Stars]]''' </big> observed with G4, G5, G6 and G7.
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