For your images select Bayer pattern RGGB
To get a smooth M97 colour, select colour smooth values 15 and 6. Normal values are 10 and 3 but since some of your stars are large, 15 (pixels) is better. The value 6 is the standard deviation above the background where it starts to smooth the colour. Lower gives blue spots in M97.
After stacking your image I have smoothed two of the brighest stars and flatten the background using option "Equalise background tool" in tab pixel math 1.
Some of your flats are displayed in portrait mode. Very strange. I have unchecked those prior to stacking.
Important delete the old FITS files. All have to be recreated using DCRAW!
Follow up of discussion at:
https://www.youtube.com/watch?v=4v3gOmvxlU0&lc=UgyOU3M_vfCw6HvitmZ4AaABAg.99Zgy1Oiwpn99edK-bENBp&feature=em-comments
I have issued develpment version 0.9.372. Only available from
http://www.hnsky.org/astap_setup.exe
DCRAW is now reinstated. See attached screenshot.
For your images select Bayer pattern RGGB
To get a smooth M97 colour, select colour smooth values 15 and 6. Normal values are 10 and 3 but since some of your stars are large, 15 (pixels) is better. The value 6 is the standard deviation above the background where it starts to smooth the colour. Lower gives blue spots in M97.
After stacking your image I have smoothed two of the brighest stars and flatten the background using option "Equalise background tool" in tab pixel math 1.
Some of your flats are displayed in portrait mode. Very strange. I have unchecked those prior to stacking.
Important delete the old FITS files. All have to be recreated using DCRAW!
Han
Last edit: han.k 2020-06-09