(Click on image for full size version)
|Description:||NGC4631 is an edge-on spiral galaxy that is
severely distorted by its neighbor below in this image, NGC4627. There
is a bridge of material between the two that is thought to be hydrogen.
|Exposure Data:||6/3,4/2003. LRGB: 18x10m, 6x10m, 6x10m,
6x10m. RGB binned 2x2.
-10°C, 0.49 arc-sec./pixel.
|Processing:||Acquired via Sequencer in Maxim, reduced and
aligned in Mira. double size, Sigma Reject combine, RGB combine in Maxim. Lum
3 iterations in CCDSharp. LRGB assembled
with curves, levels and other adjustments in Photoshop. SGBNR applied.
|Optical System:||12.5” Ritchey-Chretien @ F/9, ST-10XME NABG/CFW-8A
CCD camera, Paramount ME. L: AO-7 guided, RGB: autoguided.
|Comments:||Seeing was 2.3 arc-sec., deconvolved to 1.7
arc-sec. Sky background was 19.9 mag/arcsec2. Here
is last year's effort.