NGC 3274 — galaxy, Hubble

Preparation of calibrated archival frames, alignment, rejection of defects, and stacking were performed in Siril using Python, Codex. In a separate cosmetic version, small residual defects were replaced by local interpolation; the original stacks and masks were preserved. Neural network inpainting was not used. 

The project also separately prepared a narrowband channel F657N (Hα + [NII] + continuum): 3 exposures, 1545 s, program 13773, February 16, 2015. This exposure is not included in the stated total of the main RGB.

Working assembly: 2980 × 2980 pixels, scale 0.05″/pixel, field approximately 149 × 149″. Measured FWHM of stars in the broadband stacks — about 0.10–0.11″.
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Note the blue scattering around the bright center. Here the galaxy ceases to be just a hazy patch: numerous compact sources and stellar groups become distinguishable. It is precisely the connection between individual stars, clusters, and large star-forming regions that the LEGUS program studies, from which our broadband data were taken. LEGUS description
The golden galaxy in the upper right corner — PGC 213714. It is located significantly farther away than NGC 3274: proximity in the image does not mean proximity in space.