I have been testing an early release of PixInsight 1.8.5 which has some cool new features, one of which is the PhotometricColorCalibration process. PCC uses plate solving and photometric data for stars in the FOV to calculate the colour calibration parameters. You can select from a range of white references.
The attached pics are:
- "Classic" ColorCalibration, stars white ref
- "Classic" ColorCalibration, stars white ref, corrected for galactic dust extinction
- PhotometricColorCalibration, G2V white ref
- PhotometricColorCalibration, G2V white ref, corrected for galactic dust extinction
- PhotometricColorCalibration, average spiral galaxy white ref
- PhotometricColorCalibration, average spiral galaxy white ref, corrected for galactic dust extinction
The data was captured back in 2013 with the Ceravolo 300 @ f/4.9 and Apogee U16M camera from light polluted inner Brisbane. There's approx 2.5 hours of LRGB in 180 and 300 sec subs.
Big versions on Astrobin:
http://www.astrobin.com/299315/F/?nc=user
Thanks to Juan Conejero for all the work he has put into 1.8.5 and Vicent Peris for the PCC tool and the model for extinction correction.
Cheers,
Rick.