FIFI LS SITR December 2008. Randolf Klein (UCB) . Quick Summary. QA Issues and Mitigations. Ghost Images in Red Spectrometer – Minor Ghost images have been seen in the red spectrometer tests. The ghost images are spectrally very dilute.
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Randolf Klein (UCB)
FIFI LS itself is funded by the MPE.
Time lapse movie of a line scan
Wavelength calibration for each individual pixel
Water line at 144.5 μm
Line fit for all pixels of the central module
Fit function: Lorentz function with offset
and linear and quadratic baseline
Characterization of FIFI LS : Measuring the LSF
A grating coarse scan => modestly sampled single pixel line scan
CO line at 153 µm (J: 17-16)
CO line at 163 µm (J: 16-15)
= central wavelength + correction for
assume: shrinking factor for g
+ const. angle offset from
position read out
wavelength values using the angles
from position read out.
sigma = 0.014 µm (1/10 Dl)
Characterization of FIFI LS : Doing the wavelength
Allowing the US community to use FIFI LS as if it were a facility instrument.
This is what we did 2-d: divide up the flux between 4 adjacent grid cells with weight factors defined by overlap areas
And this is the 3-d analogue: divide up the flux between 8 grid cells with weight factors defined by overlap volumes