... STIS Data Handbook 6.0 May 2011 . ... 4.1.3 Dark Current and Hot Pixels . 4.1.4 Flat Fields . ... CCD Dark Current and Hot Pixels . ... In terms of long term trends of the CCD dark current rate, it is relevant to recall that the STIS CCD temperature was stabilized at -83 ° C between its installation onto HST on 1997-Feb-14 and the failure of the Side 1 electronics on 2001-May-16. ... Figure 4.3: Pixel-to-pixel flat field for the STIS CCD with a stretch from 0.90 (black) to 1.10 (white). ...