CRIRES User Manual
Doc. Number: ESO-254264
Doc. Version: P109.4
Issued on:
2021-12-01
Page:
33 of 99
Document Classification: ESO Internal Use [Confidential for Non-ESO Staff]
with flux. However, the CRIRES pipeline is able to correct for non-linearity effects at low-,
medium- and high- count levels (see
Figure
25
and
Figure
26
).
Figure 25: Correction for non-linearity effects implemented by the pipeline. The correction
factor from the polynomial fits (pixel-by-pixel), evaluated at certain ADU-levels and plotted
as medians and 1-sigma shaded regions over all pixels is shown.
Figure 26: Normalized ADU/s as measured from the frames corrected for non-linearity. For
the three detectors, the median over the bins in ADU-level is given. A value of 1.005 on the
y-axis corresponds to 0.5% inaccuracy.
