Working on a "deep" S50 Pinwheel image.
As this project has progressed from a few hours to 10000 frames now, it's easy to see that the increase in signal-to-noise ratio (SNR) is proportional to √N. I've been exploring different processing treatments while adopting a less is more approach as this has evolved. Will focus now on gathering data through the S50's internal LP filter. This is effectively a wide band Ha/OIII nebula filter so the red channel combined as an Ha-RGB should help make the HII regions more pronounced.
Data were acquired from my high altitude remote site ( Bortle 1) and home locations ( Bortle 3/4).from nights during Dec 2023 and March /April 2024.
Sky conditions were good to very good.
Siril simplifies multiple night compilations with large numbers ( >2000) of files with its .fits sequence conversion capabilities. My results are similar using Siril "simplified drizzling" to PI's X2 drizzle in WBPP so I do not see any benefit to WBPP and PI for stacking large numbers of frames. YMMV. Siril is much faster and the rejection algorithms produce similar results,
https://siril.readthedocs.io/en/latest/Sequences.htmlPost processing using PI for DBE, SPCC,deconvolution (BXT) and minor noise reduction using NXT. Masked stretch and curve transformations.
More data to be added.
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