Bugs: ds9, dax, and XPA
Table of Contents
Enabling the Preserve During Load preferences can lead to regions being shifted by 0.5 pixel in both X and Y directions.
CIAO users should not enable either of the following options in their preferences:
Menus and Buttons → File → Menu → Preserve During Load → Pan Menus and Buttons → File → Menu → Preserve During Load → Region
Due to the way CIAO starts ds9, having these preferences enabled leads to a half-pixel shift in regions. This shift accumulates if the region file is saved and re-loaded.
If a user has multiple instances of ds9 running, the dax tasks which use xpa calls will not work properly.
You can specify a unique name for each ds9 when it is launched
unix% ds9 -title snrs file_1.fits & unix% ds9 -title grbs file_2.fits &
Some of the text boxes are non-functional when ds9 is launched from a sherpa image* command.