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The inherent nonlinear response of infrared detectors limits the ultimate photometric accuracy that can be obtained. In this paper we show that, by limiting the observations to a fraction of the full dynamic range, we can decrease the variance of the corrected residuals. This improvement is due both to a more accurate nonlinearity correction solution and to a reduction in the number of pixels affected by saturation in neighboring pixels. We compare several metrics of goodness-of-fit for non-linearity corrected integrations over a range of full well fractions. We show that, by limiting the operational dynamic, we can improve the quality of the non-linearity corrections and increase the number of science-grade pixels. We find that when we limit the dynamic range to 80% of the full well, the variance of the residuals decreases by a factor of two and that other metrics of slope consistency show even larger improvements. |
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