* 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 sample arcs in the right-hand column of the table and the arc maps linked to below.
* Click on the following links for arc maps for <big>'''[[G4]]'''</big>, <big>'''[[G5]]'''</big> and <big>'''[[G7]]'''</big>. Arc maps for the remaining gratings will be posted once they are available.
* Click on the following link for <big>'''[[Sample Spectra of Spectrophotometric Standard Stars]]'''</big> observed with G4, G5, G6 and G7.
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