NGC1275 et al in Pegasus


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Description: NGC1275 is the largest galaxy in the image and the grouping is known as Pegasus cluster of galaxies.  NGC1274 contains a very strong radio source known as Pegasus A.  Close examination of the image shows filaments of gaseous material moving outward at up to 1500 miles per second.  The full size image shows a large number of faint galaxies.  North is up.
Exposure Data: 12/12/2002.  LRGB: 12x10m, 4x5m, 4x5m, 4x7m, RGB 2x2. -20C, 0.8 arc-sec./pixel.
Processing: Acquired via script with Maxim, reduced and aligned in Mira, sub-frames combined in Sigma, L: 10x RL in AIP4WIN, RGB combined 1.0:0.9:1.05 in Maxim, LRGB assembly, curves, levels, mild USM other processing in Photoshop.  10 darks, 20 bias and 10 flats per filter used in calibration, also combined in Sigma.
Optical System: 10 Ritchey-Chretien truss prototype by RCOS @ F/9, ST-8E USB NABG/CFW-8A CCD camera, AO-7 auto-guided, Paramount ME mount.
Comments: Seeing was 3.0 arc-sec and deconvolved to 2.1 arc-sec.