Struggling with aperture photometry in Siril (seqpsf and light_curve)

Software Siril
1

Having a lot of trouble trying to use siril for aperture photometry. I have a sequence of images, along with a variable and many reference stars that I want to compare. Using seqpsf on a star doesn’t give the relative magnitude of the star across the frames. So I try to use light_curve to recover the magnitude of the star across the frames, but using the coordinates I give it, it instead performs the command on nearby brighter stars instead of the star I wanted. Now I’m struggling to get the magnitude of the stars across the sequence of images. If I can’t do it well with Siril, what other programs would one recommend? Any help would be greatly appreciated

I’m using siril v1.2.0-rc1 on Windows 11.

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If you have a lot of stars next to each others, the inner and outer radii will need to be small but indeed siril will still jump to the brightest star in the box. We plan to change that in a future version.

Make sure you start with the first image of the sequence loaded, as it will give the coordinates for the rest of the sequence.

If it doesn’t work, I think the reference software for this kind of analysis is AstroImageJ.

1 Like
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You can draw a selection around the star and, right click and PSF for sequence. This is the same and you will select the right star.