MZERO calibration failure!

[Al McLean]

Using version 2025.2.17, almost every fits file gives the message in the title when trying to get an SQM figure.

Occasionally it comes up with a truly ridiculous figure of Bortle 1 (I am in a B6 zone). The same files solve quickly and give a sensible answer in version 2024.03.07 (on my imaging laptop).

Is there a setting that needs changing somewhere? There is sometimes a message about less than 3 usable stars found. This seems strange as the Magnitude annotation finds loads, down to mag 17+.

[han.k]

There where several changes in the routine. Can you share one images which give a incorrect SQM. Just attach it to post here.

Can you also make a screenshot of the SQM menu?

Han

[Al McLean]

Thanks for the prompt response, Han.

I've put the file that gives the B1 result in a dropbox folder:

https://www.dropbox.com/scl/fi/4duzimf86klkqh47xyajf/L_18519_60s_G100_OFS30.fit?rlkey=3622twb3eefikluoyzksn2466&st=krlw18ix&dl=0

Here are the SQM screens:

[han.k]

Thanks. I can reproduce it here. Must be related to the OSC image. I will fix it.

[Al McLean]

Great stuff! Thanks.

[han.k]

Fixed in version 2025.03.03.

MacOS follow in 20 minutes.

[Al McLean]

Thanks, Han. That works fine!

[han.k]

Please upgrade to ASTAP version 2025.03.07. The previous versions have a bug in sigma clip stacking of OSC images.

Cheers, Han