Stacking up-the-ramp frames with weights optimized for SNR=1 faint pixels improves SNR over equal-weight and ramp-fitting and yields about 0.5 mag deeper CSST near-infrared limits.
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A Quasi-Optimal Stacking Method for Up-the-Ramp Readout Images
Stacking up-the-ramp frames with weights optimized for SNR=1 faint pixels improves SNR over equal-weight and ramp-fitting and yields about 0.5 mag deeper CSST near-infrared limits.