... Near Infrared Camera and Multi-Object Spectrometer Instrument Handbook for Cycle 17 > Chapter 4: Imaging > 4.5 Cosmic Rays . 4.5 Cosmic Rays . As with CCDs, cosmic ray hits will produce unwanted signal in the output images. ... On-orbit measurement of the distribution of cosmic rays shows 1.2 to 1.6 events/second/Camera for 5 ? ... The calibration pipeline, as described in the NICMOS Data Handbook, can identify and remove cosmic ray hits from MULTIACCUM observations. ...
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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