| Object: Messier
97, the Owl Nebula, planetary nebula in Ursa Maior Telescope: Astrograph 400 f/4 Newton (APM 1.5x multiplier/corrector up to 2440mm fl). Paramount ME. Camera: Artemis ART4021. Astronomik LRGB filters. Exposures: Halpha : 105 x 15' (26:15 ) Oiii : 46 x 15' (11:30 ) R: 10 x 200" ( 0:33 ) G: 10 x 200" ( 0:33 ) B: 10 x 200" ( 0:33 ) Resolution: 0.37"/pixel (drizzle resampled). H-alpha FWHM after integration: 2.4" Guiding: Moravian G0 on Off-Axis Guider Date: April - May 2019 Site: Sagan Observatory Las Rozas (Spain) - mag 4.5 suburban skies - |
Processing: Bias, Darks & Flat calibration Drizzle integration DBE Histogram & Curves adjustments HDRMT LRGB combining - L(Ha,Oiii) nebula color (Ha,Oiii), stars color (RGB) Noise reduction: ACDNR Software: PixInSight |