Is there a trick to integrating (stacking) light frames with substantially variable FWMH and Eccentricity, as calculated by the PI Image Analysis Script?
I am pre-processing and processing NB Light Frames (Ha, OIII, and SII) obtained over several nights. I have noticed the following variables and artifacts before pre-processing:
1. Fluffy clouds (but visible stars and visible target DSO (M27));
2. Median FWHM ranging from 2.6 to 4.0;
3. FWHMEccentricity ranging from 0.30 to 0.50;
4. MAD FWHM ranging from 0.21 to 0.65.
When I stack and combine frames & channels, I am getting round stars with a green halo. I have tried deconvolution, eliminating frames with suspected clouds; fiddling with Histogram Transformation; TGVDenoise; and MLT to eliminate the green halos. To no avail. BTW I am using AIP-SHO to combine channels using the CFHT palette (HOS = RGB). I have attached a *.JPG file of the SHO-API combination.
SOME QUESTIONS:
1. What are good target values for FWHM, FWHMEccentricity, and MAD FHWM?
2. Any thoughts as to eliminating the green halos?
Thanks!!!
