Verifying the NICMOS Count Dependent Non-Linearity Correction

Details Verifying the NICMOS Count Dependent Non-Linearity Correction Verifying the NICMOS Count Dependent Non-Linearity Correction

Jun 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008nicm.rept....3s&link_type=abstract

Instrument Science Report NICMOS 2008-003, 27 pages

Physics

Hubble Space Telescope, Hst, Space Telescope Science Institute, Nicmos, Count Dependent Non-Linearity

Scientific paper

We re-investigate the NICMOS count dependent non-linearity, using the flat field lamps to reach high count regimes. The NICMOS count dependent non-linearity has been previously quantified and is currently corrected in NICMOS pipeline. In this document we show that the count dependent correction is still accurate to within 1.2% of true linearity for counts above 100 ADU in dependent of filter used. This is a response to the count-rate dependent non-linearity investigations, to eliminate questions about the current count dependent corrections.

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