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MAY 4 2026: APP 2.0.0-beta44 has been released !

New improved internal memory controls should now work on all computers

May 1 2026: APP 2.0.0-beta43 has been released !

Improved internal memory controls (much more stable and faster on big datasets), fixed CPU image viewer, fixed Narrowband extraction demosaic algortihms.

Apr 29 2026 APP 2.0.0-beta42 has been released !

New improved Normalization engine, Fixed random crashes in integration, fixed RGB Combine & Calibrate Star Colors, fixed Narrowband extraction algorithms, new development platform with performance gains, bug fixes in the tools, etc...

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Update on the 2.0.0 release & the full manual

We are getting close to the 2.0.0 stable release and the full manual. The manual will soon become available on the website and also in PDF format. Both versions will be identical and once released, will start to follow the APP release cycle and thus will stay up-to-date to the latest APP version.

Once 2.0.0 is released, the price for APP will increase. Owner's license holders will not need to pay an upgrade fee to use 2.0.0, neither do Renter's license holders.

 

Strange trails or (bad?) pixels

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(@infoarnaldolopez-nl)
White Dwarf
Joined: 6 years ago
Posts: 14
Topic starter  

Hi,

 

I just tried to stack some long exposure (30 to 90 sec.) of comet Neowise and got strange pixel trails in an opposite direction of the startrails. Would this be solved if I had made darks and bias etc.? 

 

Thanks,

Arnaldo

2F809BF8 6A65 42F9 B381 33959F58DFA8

 


This topic was modified 6 years ago by Arnaldo Lopez

   
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(@Anonymous 174)
Joined: 9 years ago
Posts: 5702
 

Very likely yes, these can be bad pixels.



   
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(@infoarnaldolopez-nl)
White Dwarf
Joined: 6 years ago
Posts: 14
Topic starter  

@vincent-mod Thanks for your reply... Is there any way to minimize them without darks etc.? 



   
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(@Anonymous 174)
Joined: 9 years ago
Posts: 5702
 

You can try to use cosmetic correction in tab 2, switch the options on for hot pixels, I'm not entirely sure if that works without any calibration data (never tried that). Brin the hot pixel kappa down to maybe 2.5 or lower to make it more aggressive.



   
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(@infoarnaldolopez-nl)
White Dwarf
Joined: 6 years ago
Posts: 14
Topic starter  

@vincent-mod Thanks! I’ll just give it a try... And maybe I’ll make some darks too... If they are bad pixels, they might appear at the same place anyway!? 



   
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(@Anonymous 174)
Joined: 9 years ago
Posts: 5702
 

Yes that's why darks work. If you make some proper darks a BPM will be made automatically as well, this you can use on all your data taken with the same sensor. It removes bad pixels and never hurts the data, so always use one is my advice.



   
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(@infoarnaldolopez-nl)
White Dwarf
Joined: 6 years ago
Posts: 14
Topic starter  

@vincent-mod from now on... I will 😉 Thanks for the advice!

 



   
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(@steveibbotson)
Red Giant
Joined: 9 years ago
Posts: 31
 

You could try some retrospective darks.



   
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(@Anonymous 174)
Joined: 9 years ago
Posts: 5702
 

Good suggestion Steve, you can try that indeed and make a bpm with those.



   
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(@infoarnaldolopez-nl)
White Dwarf
Joined: 6 years ago
Posts: 14
Topic starter  
  • @steveibbotson Indeed, I thought about that. I’ll give it a try! 


   
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