Best way to do 400+ stars on three images

Posted by David Emory on Jun 20, 2013; 7:59pm
URL: http://astroimagej.170.s1.nabble.com/Best-way-to-do-400-stars-on-three-images-tp48.html

Background: I have 400+ target stars on which I need to do photometry. I have three images in different colors. I also have the WCS coordinates in RA and Dec for the target stars in a text file.

What is the most efficient method to accomplish this? Can AstroImageJ read in a coordinate text file and then do the photometry on each image (either individually or as a group)?

If this this not possible, can I select the stars on the first image and then "tell" AstroImageJ to use the same stars on the other two images. I tried this with the "Multiple Aperture" option but it appears that default is to match the second and third images to the X,Y coordinates and not the WCS. The WCS do not match the X,Y coordinates as I go from one image to another.