M94, spiral galaxy in Canes Venatici


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Description: This unusual galaxy has a bright ring of star forming regions in clusters around the core.  Moving outward, there is a collection of older stars followed by another ring of young stars.  Continuing further out, there is a dust area and beyond that a galactic glow that extends nearly to the total height of the image.  The latter areas depend on a carefully adjusted monitor to see.
Exposure Data: 3/30/2004.  LRGB: 49x3m, 10x3m, 10x3m, 10x3m. RGB binned 2x2.
-20C, 0.59 arc-sec./pixel.
Processing: Acquired via Sequencer II and CCDSoft, reduced, aligned and combined in Mira, L 30xRL, DDP in AIP4WIN, LRGB in Maxim, final combine, curves, levels and other processing in Photoshop.
Optical System: 14.5 Ritchey-Chretien RCOS Truss @ F/6.4, ST-10XME NABG/CFW-8A CCD camera, Paramount ME. AstroDon filters with IR-filtered L. Unguided and dithered 4 arc-sec.
Comments: Luminance frame measured 3.2 arc-sec. before deconvolution and 1.6 arc-sec. after.