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 and 70 micron dark A images were coadded using mips_enhancer with the dark flag. Slopes can now be fit to all pixels at 70 and 160.
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 4.3 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 no longer saturated. Most of the pixels on side B, however, are at least partly below the bottom rail, due to the anomaly first seen in this campaign. Slope images for all the dark mirror positions are shown in Figure 3. Mean slopes at the 70 dark A position are ~ 200 DN/s.
Figure 2. 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 to ~ 1000 DN/s.
The 160 µm array is fully on-scale, with mean counts ~ 4650 DN/s (not including readout 3). A slope image is shown in Figure 3. Readout 3 continues to misbehave, being completely off-scale below the bottom rail.
