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Mar 28 2026 APP 2.0.0-beta40 will be released in 7 days.

It did take a long time to have the work finished on this and it  will have a major performance boost of 30-50% over 2.0.0-beta39 from calibration to integration. We extensively optimized many critical parts of APP. All has been tested to guarantee correct optimizations. Drizzle and image resampling is much faster for instance, those modules have been completely rewritten. Much less memory usage. LNC 2.0 will be released which works much better and faster than LNC in it's current state. And more, all will be added to the release notes in the coming weeks...

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[Solved] Cannot Analyse starts around NGC 55

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(@lanties)
Red Giant
Joined: 8 years ago
Posts: 42
Topic starter  

I have played around with the settings under 3)  but I cannot get APP to analyse the stars in these frames. Sample Attached. 

ngc 55 2018 10 02 30sec 1x1 Lum frame51 St St

Any suggestions ?



   
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(@mabula-admin)
Universe Admin
Joined: 9 years ago
Posts: 5056
 

Hi @lanties,

Can you send me a couple if frames, so I can have a close look? (3-5 frame will be fine)

Please send them to support@astropixelprocessor.com with wetransfer.com or dropbox.

What does happen? No star count at all, or less than 6?

Mabula



   
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(@lanties)
Red Giant
Joined: 8 years ago
Posts: 42
Topic starter  

Hi @mabula-haverkamp-administrator,

I have emailed the dropbox link.

It seems that it is not detecting any stars

Regards

Johan



   
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(@mabula-admin)
Universe Admin
Joined: 9 years ago
Posts: 5056
 

Hi Johan @lanties,

Thank you, I will download it and will have a look immediately 😉

Will report back with my findings.

Mabula



   
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(@mabula-admin)
Universe Admin
Joined: 9 years ago
Posts: 5056
 

Hi Johan @lanties ,

Which APP version are you using currently?

The latest release: APP 1.067 , has no problem detecting several hundreds of stars in the images and registration is no problem as well.

All with default settings:

No Problem APP 1067

Perhaps you are on an older version? There have been quite a few upgrades in star analysis in the last releases.

Kind regards,

Mabula



   
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(@lanties)
Red Giant
Joined: 8 years ago
Posts: 42
Topic starter  

I am on 1.067.  I always just use default settings except for 6). Got a message that APP could not detects stars and that I had to lower kappa value. in 3). I then started playing around with the values but with no success. Could it be calibration data that perhaps need to be redone?



   
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(@mabula-admin)
Universe Admin
Joined: 9 years ago
Posts: 5056
 

Hi Johan @lanties,

Without calibration masters all is fine, so yes, I suspect a problem with your calibration masters. Please verify the masters 😉

Check how an image looks calibrated using the l-calibrated image viewer mode, that might give a clear clue.

Mabula



   
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(@lanties)
Red Giant
Joined: 8 years ago
Posts: 42
Topic starter  

Hi Mabula (@mabula-haverkamp-administrator,

My humble apologies. APP works perfect! I really do not know what I did wrong. I just closed down everything and started from scratch and all worked out 100%. This was just a test in Lum on NGC 55 to see what I can get if I spend some time on it. Your prompt assistance are much appreciated and apologies for wasting time on this. 

ngc55


   
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(@mabula-admin)
Universe Admin
Joined: 9 years ago
Posts: 5056
 
Posted by: lanties

Hi Mabula (@mabula-haverkamp-administrator,

My humble apologies. APP works perfect! I really do not know what I did wrong. I just closed down everything and started from scratch and all worked out 100%. This was just a test in Lum on NGC 55 to see what I can get if I spend some time on it. Your prompt assistance are much appreciated and apologies for wasting time on this. 

ngc55

No problem Johan @lanties,

I am glad that all is allright now. If such a thing happens again, do check the calibrated data with the l-calirbated image viewer mode. That is very usefull to point out a problem with the data or the calibration frames 😉

Have a great day 😉

Mabula



   
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