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|Description:||This unusual collection of galaxies has
NGC3718, the larger one, and NGC3729, the smaller barred spiral to the
right. There is a tight grouping of 5 galaxies at the top from left to
right: PGC35609, PGC35615, PGC35618, PGC35620 and PGC35631. PGC35620
is severely distorted. South is up.
|Exposure Data:||5/13,14/2004. LRGB: 50x3m, 12x3m, 12x3m,
12x3m. RGB binned 2x2.
-20°C, 0.59 arc-sec./pixel.
|Processing:||Acquired via Sequencer II and CCDSoft, reduced,
aligned and combined in Mira, L 20RL interations in AIP4WIN, RGB
in Maxim, final combine, curves, levels and other processing in Photoshop.
|Optical System:||14.5” Ritchey-Chretien RCOS Truss @ F/6.4,
SBIG ST-10XME NABG/FLI CFW-2 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.