Stacking via WCS results in blank images

Posted by cduston on Jul 05, 2017; 3:05pm
URL: http://astroimagej.170.s1.nabble.com/Stacking-via-WCS-results-in-blank-images-tp708.html

Hello,

   Running AstroImageJ 3.2.0 on Ubuntu MATE here. I have a pair of images which appear to have valid WCS - at least, at the top of the image it says (WCS=RA,DEC, PA+Scale). So if I try to stack these via Process -> Align Stack using WCS or aperatures, and click "use only WCS headers for alignment", I get the success message (something like "images saved in subdirectory 'aligned'").

So I open the aligned images as a stack, but they are blank, and in no image data anywhere. There is a plate scale (X,Y, and RA, Dec) but all count values are identically 0.

Anyone know what is causing this? I can do a fine alignment using aperatures, but I'm having some SIMBAD-search problems later with the new plate solutions, so I'd like to preserve the WCS from the original images if possible.

Thanks!