Figure 1. Coadded 24 µm dark image (not including bias boost DCEs). Data values range from ~ 0 to 15 DN/s. Bad pixels have been masked out.
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All data were processed with DAT version 2.21 in order to derive calibrated images. The 24 micron images were coadded using mips_enhancer with the dark flag. Slopes can now be fit to most pixels at 70 microns, though almost all ramps are saturated.
The 24 µm dark remains dark. Figure 1 shows the calibrated, coadded image of all 50 DCEs in the observation (combined with mips_enhancer). Mean counts are 4.7 DN/s (this is probably artificially inflated due to larger slopes in the bottom part of the array; see the MIPS-190 report).
Figure 1. Coadded 24 µm dark image (not including bias boost
DCEs). Data values range from ~ 0 to 15 DN/s.
Bad pixels have been masked out.
The 70 µm array is getting less saturated, especially at the 70 dark A and 160 dark mirror positions. Slope images for these positions and the 70 dark B position are shown in Figure 3. Mean slopes at the 70 dark A position are ~ 28,500 DN/s.
Figure 3. 70 µm slope images at the 70 µm dark A
position (left), dark B position (middle) and the 160 µm dark/SED mode
position (right). Values range from 0 (saturated) to ~100,000 DN/s.
The 160 µm array could not be packed due to problems with the pipeline. Inspection of MIPL data indicated it is still fully saturated.