New User Issue!!

[skyguy]

I am attempting to re-learn AIJ for a course I am teaching this semester, but I am having trouble when I go to place apertures.  I keep getting the following error: " WCS mode requested but no valid WCS coordinates stored. ABORTING.

Can someone give me some advice on how too resolve this issue. I'm sure it is me!

[karenacollins]

It sounds like your images are not plate-solved (i.e. don't have WCS coordinates in the fits headers). If that is the case, you can disable the "Use RA/Dec to locate aperture positions" option in the Multi-Aperture set-up panel.

If you'd prefer to plate solve first, either outside AIJ or or using AIJ's astrometry feature (), then the RA/Dec option should work.

If only a subset of images are plate-solved, the turn off "Halt processing on WCS or centroid error", and as long as the first image is plate solved, the photometry should proceed with Use RA/Dec enabled. This mode can be handy if you have a meridian flip or large jump in tracking. Then only the first image and any image after a large change in the position of the filed on the detector need to be plate-solved.

Karen