Feature/solve nan

[mkuemmel]

Checked it also on Raphael's dataset. And it does identify the bad apples.

[mkuemmel]

Perfect, also the check now happens earlier:

2025-09-26T19:42:03CEST BackgroundModel  INFO : Background for image: Masked(Masked(ProcessedImage(BufferedImage(/project/ls-mohr/users/martin.kuemmel/cluster_sepp_example/CORR-0268528-102.fits),ConstantImage<2048,4176>(0.070091))) with 0.0% weight image masked pixels;) with 38.0% weight image masked pixels; median: 0.0968899 rms: 4.06483!
2025-09-26T19:42:05CEST PsfPlugin ERROR : Failed loading a psf file: /project/ls-mohr/users/martin.kuemmel/cluster_sepp_example/CORR-0091740-102.psf
2025-09-26T19:42:05CEST SourceXtractor FATAL : Malformed variable PSF, coefficient matrices contains NANs
2025-09-26T19:42:05CEST Python::Interpreter  INFO : Python GIL acquired 63 times
INFO:    Cleaning up image.

[mkuemmel]

With only the good PSFEx files everything is golden:

bash-5.1$ tail euclid_slurm.usm-cl-bt01n2.11443608.err
2025-09-27T07:37:09CEST Progress  INFO : Elapsed: 10:29:39
2025-09-27T07:37:09CEST SourceXtractor  INFO : total 189544 sources detected
2025-09-27T07:37:09CEST ElementsProgram  INFO : ##########################################################
2025-09-27T07:37:09CEST ElementsProgram  INFO : #
2025-09-27T07:37:09CEST ElementsProgram  INFO : #  C++ program:  sourcextractor++ stops 
2025-09-27T07:37:09CEST ElementsProgram  INFO : #
2025-09-27T07:37:09CEST ElementsProgram  INFO : ##########################################################
2025-09-27T07:37:09CEST ElementsProgram  INFO : ##########################################################
2025-09-27T07:37:09CEST Python::Interpreter  INFO : Python GIL acquired 63 times
INFO:    Cleaning up image...

That was: 10 true cores, 20GB RAM and 10h run time.