Phase 2 Proposal Instructions for Cycle 10

5.12 Central Wavelength or Range if Grating or Prism Used [Wavelength]

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If a linear ramp filter, quadrant filter, grating, or prism is to be used, the central wavelength should be entered. NICMOS exposures do not require a central wavelength or range.

Wavelengths should be expressed in � in the observed frame (but the units should be omitted). Use vacuum wavelengths below 2000 �, and air wavelengths above 2000 �.

For STIS exposures, the central wavelength must obey one of the legal spectral element/wavelength combinations given in Table10.2: Supported Central Wavelengths for STIS Gratings.