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How does CUBISM render slit sizes?
Posted by z-Vandana Desai on 09 June 2009 04:19 PM

The aperture shown in CUBISM is data-driven, and does not intend to represent the full slit. The width in the CUBISM visualization reflects that of the 1 pixel width wavesamp, which is set that way on purpose, reflecting the fact that in the cross-slit direction, you have a convolution of spectra and spatial information. It also uses the actual configured length of wavesamp pseudorectangles (not just some fiducial slit length number). So it's on the conservative side, whereas Spot's visualization is "generous" with the slit dimensions.