Return to: UVOT Digest
Tails in Image Mode Data
Data taken in "Image" mode prior to March 29 had an erroneous drift correction applied in one or both detector directions. The result: in images where a significant drift is present, stars appear comet-like as opposed to point-sources. The error was corrected via a UVOT flight software code upload on March 29, 2005. Image data taken prior to this date may have comet-like artifacts around the stars if drift was present during the exposure.
Return to: UVOT Digest
If you have a question about Swift, please contact us via the Feedback form.