Figure1. Illumination Corrections in 160micron for PHOT (left) and SCAN (right) modes. Cuts are z1=-0.5 z2=2.5 for both images.
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In PHOTOMETRY mode we obtained a 9 point dither map (1
cycle) at 160micron with 3 second DCEs of one region of
the sky (zodi_14a) chosen to avoid bright point sources.
The offsets between positions are 300 arcseconds. At each position of the dither pattern
there are 16 images (4 of which are stim flashes), so a total of 108
sky images were obtained to construct the 160micron Illumination Correction (IC).
In SCAN mode we have observed 2 degrees (3 legs) in fast mode for three different
regions of the sky (zodi_13b, zodi_28b, and zodi29a). Each leg has 325 DCEs (10 stims)
for a total of 2835 DCEs combining the data from the three regions. Note that two of
the 160micron SCAN regions were observed in MIPS-305 and MIPS-306.
The reduction was performed with the DAT programs. We used mips_sloper with
sensitive cosmic ray detection (-q option)
turning off the electronic non-linearity correction, mips_caler (using
the me_160_dark_CamQ_7nov2003.fits)
and mips_enhancer with the following options:
verbose = 0
scale = 1.
filename = ic160_scan
prefix = ic_scan160
nXTile = 1
nYTile = 1
dark = 0
flat = 0
illumination_correction = 1
NormalizeInput = 1
SigmaCut = 3.0
SigmaTolerance = 0.25
MaxIterations = 10
StackSTDEV = 0
OutlierMinPoints = 3
QuartileFactor = 10
OverlapTolerance = 0.5
diagonistics = 1
WriteGeometry = 0
WriteOutlier = 0
WriteTiles = 0
FluxMean = 0
FluxMedian = 1
OverWrite = 1
distortion = 0
UseBoostFrame = 1
reject = 1
Note that we rejected the first DCE after the stim flash (reject = 1 option) and normalized
the input images (NormalizeInput = 1 option).
Figure1.
Illumination Corrections in 160micron for PHOT (left) and SCAN (right) modes.
Cuts are z1=-0.5 z2=2.5 for both images.