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Apr 12 2026 APP 2.0.0-beta41 has been released !
It has a major performance boost of 30-50% over 2.0.0-beta39 from calibration to integration, for mosaics even faster! 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 has been released which works much better and faster. Improved Outlier Rejection with LN 2.0 rejection. macOS CMD+A works now in file chooser ! And more...
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.
Hello,
I have light frames of my HA-OIII colour camera and a friend of me shared his HA and OIII mono fits files.
How can I stack the HA together? I need first to extract HA-OIII, but than it will be a master light file.
Or can select in tab 0 the colour HA and load the HA-OIII in session 1 and HA mono in session 2? And stack them together?Â
Stefan (@stefanastro)
I haven't tried this (yet) but it shouldn't be too difficult.
I would start by choosing 'Ha-OIII extract Ha' on tab (0) (assuming its still called that - I'm a bit behind on APP versions).
Don't take APP to integration, just save the calibrated Ha mono files, which you can do on tab 2 or 4. Ideally your friend's files would already be calibrated, otherwise you will need to separately calibrate and save his files (unless you decide to use his data uncalibrated - not ideal but it can work).
Then clear APP and load both sets of data with no calibration files and you should be able to create a combined Ha integration. Depending on which version of APP you are using you might have to uncheck 'same camera and optics' for registration - but I gather the latest APP version does not require this. I would recommend 'local normalization correction' but you might need to experiment with this.
Then you would repeat all this with your OIII and your friend's OIII (I'm assuming you want to use his OIII as well).
This will leave you with a combined Ha integration and a combined OIII integration. Just load these as lights (no calibration), run register, save the registered frames, and you should be ready to do Combine RGB or whatever you like for normal processing of NB mono files.
The only difficulty I can see is you might have to play around with registration options if his pixel scale is very different to yours, or if the star counts are too low.
JC
