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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...

Update on the 2.0.0 release & the full manual

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How to register images when many stars are faint?

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(@chrisgr99)
White Dwarf
Joined: 4 years ago
Posts: 5
Topic starter  

I took five 300 second narrow band images of the Iris Nebula with iTelescope T24 in each of Ha, OIII and SII. Registration is failing in APP. I think it's because most of the stars are too faint. Attached is the jpg version of one of the images. The stars are faint but visible. Can anyone suggest how to adjust APP to register these images? I tried reducing the number of stars in analyze from 500 to 100 but this did not help.

jpeg T24 skyguy iris nebula 20220809 000636 Ha BIN1 E 300 001


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

Most of the time, if stars are actually ok enough (even more faint ones), it should be able to find them. Did you download the corrected images or the raw ones? I've noticed that sometimes the corrected images are faulty due to issues in calibration. Also, the light you show here doesn't look very good to begin with, with 300s I would expect a bit better signal, for narrowband though I tend to go to 600 or even 900 seconds.



   
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