| Object: Ngc 3521, galaxy in Leo. Telescope: Astrograph 250 f/4 Newton. Paramount ME. ATIK 16200 ccd. Chroma LRGB filters Exposures: L : 382 x 5' ( 31:50 ) R: 40 x 5' ( 3:20 ) G: 40 x 5' ( 3:20 ) B: 40 x 5' ( 3:20 ) Total: 44:50 hours Resolution: 1.03"/pixel. Date: December 2021 - February 2022 Site: La Sagra Observatory Puebla de Don Fadrique (Spain) - mag 7 professional observatory skies - |
Processing (PixInSight): Bias, Dark & Flat calibration Local Normalization DBE MLT linear noise reduction Photometric Color Calibration Starnet for star masks Deconvolution Histogram stretching HDRMultiscale Transformation Color saturation adjustments Morphological Transformation stars reduction Wavelet sharpening ACDNR noise reduction |