The 2D product spectrum of nightly acquired telluric standard stars
is analyzed. The PSF of the central positive signal (ignoring both
neigboring negative signals originating from the NIR double subtraction
data reduction method for nodding observation) is fit with a Moffat function for each
wavelength bin. The spectral trace is fit by a quadratic function:
The mean position of the spectral trace (ADC_y0) and the spectral slope
(ADC_y1) as a measure of the residual optical distortion are monitored, ADC_y1 is scored in addition.
ADC_y2 is available in the QC1 DB.
Click on any of the plots to see a close-up version.
The latest date is indicated on top of the plot.
data points belonging to the latest date are specially marked
statistical averages are indicated by a solid line, and thresholds by broken lines
outliers are marked by a red asterisk. They are defined as data points outside the
"aliens" (= data points outside the plot Y limits) are marked by a red arrow (↑ or ↓)
you can download the data for each parameter set if the 'Data downloads' link shows up