In rtplot it is possible to plot a file of defects that can be setup with setdefect. Still, this is a sufficiently tedious process to go through that many might not bother. To short-circuit this I will keep suitable files here to get you started. These are not necessarily fixed forever because many of the 'defects' are in fact dust on the surface which may move, thus I include dates with the files. For each date there are upto three types of files. 'transform' files are ASCII files which give the relative orientations of the CCDs and are generated by the script 'transform.pl'. 'defect' files are ASCII files listing defects to be plotted by 'rtplot'. Note that these two types are independent so you can reuse a defect file with a modified transform file. However, you should always re-do both files for a run because your and my definitions of what counts as a 'disaster' or 'moderate' bad pixel may differ and because of the likelihood of changes in the pattern. Finally there are bad pixel files for use by 'reduce' with positive integers to flag bad pixels, the larger they are the worse the pixel.
| Date | Files | Comments |
|---|---|---|
| 21 May 2003 |
transform defect bad pixel |
The green CCD is the worst for dust. Transform deduced from NN Ser aperture file. The defect file still needs some work to avoid the worst hot pixels and to check that I have not missed any other specks of dirt. To make the bad pixel file, I applied 'smooth' three time to the flat field and then divided it into it. I then used 'badgen'along with 'cmul' and 'add' to set all pixels below 0.5 to 90 and all from 0.5 to 0.8 to 50. |