M101 / NGC5457
![](https://www.xiulong.it/tianwensheying/wp-content/uploads/2023/05/Ha_lfL_DBEezdeconvEZDENOISEstretchedNOISEXTblurxt_starxt-starlessCS-crop-focused-M101-1024x741.jpg)
Astrobin: https://www.astrobin.com/e0kz45/
![](https://www.xiulong.it/tianwensheying/wp-content/uploads/2023/05/Ha_lfL_DBEezdeconvEZDENOISEstretchedNOISEXTblurxt_starxt-starlessCS-crop-annotated-1024x774.jpg)
![](https://www.xiulong.it/tianwensheying/wp-content/uploads/2023/05/Ha_lfL_DBEezdeconvEZDENOISEstretchedNOISEXTblurxt_starxt-starlessCS-crop-annotatedPGC-1024x774.jpg)
In this workflow I used Ha narrowband as integration for Luminance and Red channel, and Oiii narrowband master as integration for Green and Blue channel as according to Kayron Mercieca, cfr.: https://www.lightvortexastronomy.com/tutorial-combining-lrgb-with-narrowband.html
Approved subframes detailed list (PixInSight weighted) resumed gathered by filter, all by Astronomic, recorded between 28/10/2021 and 25/04/2023.
Ha: 226 x 180″ -20C: 141 gain 139, 85 gain 173
Oiii: 159 x 180″ -20C: 94 gain 139, 65 gain 173
L: 636 x 60″ -20C: 553 gain 139, 83 gain 173
G: 532 x 60″ -20C: 373 gain 139, 159 gain 173
B: 500 x 60″ -20C: 298 gain 139, 202 gain 173
R: 614 x 60″ -20C: 438 gain 139, 176 gain 173
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