Re: ztf images and aperture photometry

Posted by sengle01 on Jul 29, 2022; 3:39pm
URL: http://astroimagej.170.s1.nabble.com/ztf-images-and-aperture-photometry-tp1918p1965.html

Hello,

I'm sorry for the long delay in replying, and thank you for the response and advice. I've been looking into it and I have the issue mostly worked out.

I re-solved the images using astrometry.net and that resolved the issue for individual images.

My remaining problem is running multi-aperture photometry on an imported image sequence **when the images have different sizes**. If the images are all of the same size, then I can import them either as a virtual stack or not and each image's WCS info is read without issue.

However, any images of a different size to the first in the sequence are reported as having no WCS info (even though they've also been solved with astrometry.net). But any other images in the sequence that are the same size as the first, even if they come after images of a different size, will have their WCS info successfully read. Or at least that's been my experience. I recently upgraded to v5.1.0.00.

I'm uploading a zip archive of 8 test images that have all been solved with astrometry.net - when sorted by filename, the first and last images have the same size but the middle 6 have a different size.

I imagine a quick solution would be to batch process them and fill out the images with black pixels to an arbitrarily large size, so they're all the same. Or trim them all down to the smallest image's size. But I figured I would put this up here in case there might be a way to modify AIJ's handling of differently-sized images.

Best,
Scotttest.zip