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The Near Infrared Coronagraphic Imager: NICI Update
Stop me if you’ve heard this one….. Insensitivity to Aft optics comes only from occulting mask.
Performance – Background Removal Raw Difference Avg. Profile Out Scaled Difference rms ~ 10% rms ~ 10% rms ~ 2% All images are (A-B)/A - Plotted Range is +/- 0.5
Performance – Background Removal After Coronagraph and Channel Difference Contrast Ratio to PSF Peak is ~16.7 mag @ 1.0 asec and 18.5 mag @ 1.5 asec