Not quite sure what to do with this Rosette. I am not sure it it's bad data or whether I need better processing techniques. I took this in Bortle 8-9 using an Optolong L-Extreme. There is quite a bit of noise/gradient I assume from either the significant amount of light pollution or the poor seeing conditions. I tried processing in Gimp and Pixinsight and get similar results.
https://astrob.in/n9emzl/0/
https://astrob.in/n9emzl/0/