NGC4725 in Coma Berenices


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Exposure Data: 4/24/2004.  LRGB: 50x3m, 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 3 iterations of CCDSharp, RGB 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 2.5 arc-sec. before deconvolution and 1.6 arc-sec. after.