... HST Phase II Proposal Instructions for Cycle 20 > Chapter 12: Cosmic OriginsSpectrograph (COS) > REFERENCE INFORMATION > 12.14 COS Spectral Elements and Central Wavelengths . ... Table 12.3: COS Spectral Elements and Central Wavelengths . ... Spectral Element . Central Wavelengths (Angstroms) . ... MIRRORA 2 . ... MIRRORB 3 . ... The MIRRORA spectral element positions a flat mirror in the beam to produce an image of the sky with a field of view slightly larger than the diameter of the aperture. ...
ST-ECF Instrument Science Report WFC3-2005-07 Ground tests of the WFC3 NIR grisms S. S. Larsen, H. Bushouse, J. R. Walsh March 2005 ABSTRACT The fundamental parameters of a slitless dispersing element are the geometrical configuration of the spectral orders, the dispersion relation relating pixel offset to wavelength and the sensitivity of each order. Based on thermal vacuum tests, the performance of the WFC3 near-IR G102 and G141 grisms has been assessed. ... WFC3 IR Grism Modeling and Rotations. ...
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