GIRAFFE: Fibre efficiency curves
These plots show the extracted fibre efficiency per setting. The fibre
flats are extracted by the pipeline into a normalized efficiency.
Below is shown the efficiency for the (arbitrarily
selected) fibre #10,
along with the average from all fibres (SIMCAL fibres excluded). In
order
to give an impression of the chromatic effects, the efficiency plotted
here is transformed into flux by scaling the efficiency with the
factor
(mean_raw / exposure time).
These curves essentially measure the efficiency of the
grating and the
filter. Hence we show plots for the Medusa2 slit only. Curves for the
other slits look very much the same.
The HR curves apply for the "new" grating
in use since 2003-10-10.
The settings redward of about 651.5 show significant
fringing, the amplitude
of which can be seen in the single-fibre tracings.
The fibre signal in the LR settings shows medium-scale
ondulations.
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