Strange photometry issue on macOs arm version

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Strange photometry issue on macOs arm version

Forum: General discussions ASTAP

Creator: Jonas Waage

Created: 2024-10-21

Updated: 2024-10-21

Jonas Waage - 2024-10-21

First of all, thanks for making this awesome software.

I have been using ASTAP to dip my toes in photometry, and it has worked flawlessly so far.

But now I have an issue that seems to only manifest with the arm version, both built from source and latest release.

If I use ASTAP for stacking, it seems to fail and produce an inverted final image.
If I preprocess using some other software (APP) and import to ASTAP photometry it solves fine, and detects variable stars and check stars. But when I want to calculate photometry something goes wrong, and I get the error and log in the attached image.

The intel version running under rosetta2 seems to work, but it is quite a bit slower.

Thanks again,
Jonas

astap-access-violation.png

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han.k - 2024-10-21

Hi Jonas,

Currently I'm working on a update of the photometry tab. It will be released in a few days.

If you can share the images involved, I can likely recreate the two problems here and find out why it fails. Most likely is has something to do with the background levels.

Han

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Jonas Waage - 2024-10-21

https://www.dropbox.com/scl/fo/pv6wqoxf67w4beezgjsjv/ACFea6eR-HuE3dGDTkeqgjE?rlkey=rjzaqrv4q64q5n5gg5ys5v9f1&st=qjp9nro2&dl=0

Yes, here is the full set of lights, darks, bias and flats and results from ASTAP.
In the folder app-stacked is the APP processed stack I tried to use for photometry.

The stack excludes some of the lights which were really bad due to wind, and the data is using a luminance filter by mistake (should have been G).

Last edit: Jonas Waage 2024-10-21

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han.k - 2024-10-21

The masterflat is bad. Contains only zeros. This is caused by the bias file which has a pixel value of less then 1. Just make some now bias files but do not process them in Astro Pixel processor! Then make a new master flat by loading the flat frames and bias frames in the corresponding tabs.

The photometry will work with the new version i will upload tonight or tomorrow.

Han

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han.k - 2024-10-21

ASTAP version 2024-10-12 is now released.

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Jonas Waage - 2024-10-21

Thanks, calibration worked with the new version and original bias frames.

Photometry still fails on the resulting stack with a similar error as before.

Involved data.
https://www.dropbox.com/scl/fo/pv6wqoxf67w4beezgjsjv/ACFea6eR-HuE3dGDTkeqgjE?rlkey=rjzaqrv4q64q5n5gg5ys5v9f1&st=9bvom05m&dl=0

Screenshot 2024-10-21 at 22.25.36.png

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