Distribution of readout noise measurements for all science CCDs using data acquired between OBMT revolutions 1500 and 2000. The highest noise levels are in the SM CCD strips, where the full-frame readout required for autonomous detections means that the noise requirements need to be relaxed. The detection confirmation step is carried out using the AF1 mode CCDs and 162 pixels need to be read out per line, so the noise is a little lower. Overall, the noise performances can be seen to be excellent (see text and Table 2 for further details).
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