These are the trending plots for the vignetting check computed from the LAMP FLATs.
Slitlets #1 and #32 correspond to the upper-most and the lower-most slitlets in the field-of-view.
As such, these slitlets can be subject to vignetting to the extent that their overall count rates
can be a few 10% lower than for other slitlets.
Following image reconstruction, these slitlets are located on the central part of the detector.
A possible vignetting is monitored by comparing the relative count rates (i.e. the mean counts in
the slitlet #1 or #32 divided by the mean counts in all other slitlets).
This QC1 parameter is most relevant following an instrument intervention.
General information
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 that date are specially marked.
If configured,
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
threshold lines
"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
