This high-resolution HOO narrowband composite maps the low-surface-brightness filaments of the Galactic supernova remnant SNR G65.3+5.7 in the constellation Cygnus. Captured from Huércal de Almería, Spain, the sprawling structure required a demanding 2 x 4 spatial mosaic (8 tiles total) integrated under highly variable atmospheric conditions. Due to the exceptionally low photon flux of the target, data acquisition was executed using 2×2 binning to optimize the signal-to-noise ratio SNR, accumulating 50 exposures in Hydrogen-Alpha and 50 exposures in Oxygen-III per individual tile.
This high-resolution HOO narrowband composite maps the low-surface-brightness filaments of the Galactic supernova remnant SNR G65.3+5.7 in the constellation Cygnus. Captured from Huércal de Almería, Spain, the sprawling structure required a demanding 2 x 4 spatial mosaic (8 tiles total) integrated under highly variable atmospheric conditions. Due to the exceptionally low photon flux of the target, data acquisition was executed using 2×2 binning to optimize the signal-to-noise ratio SNR, accumulating 50 exposures in Hydrogen-Alpha and 50 exposures in Oxygen-III per individual tile.