(Click on image for full size version)
|Exposure Data:||4/21/2002. LRGB: 18x5m, 6x5m, 6x5m, 6x8m.
-15°C, 1.0 arc-sec./pixel
|Processing:||Acquired via script with Maxim, reduced,
background corrected and aligned in Mira, 2x RGB and RGB combine in Maxim. L
3x CCDSharp. PS: LLRGB 50% using unsharpened L, 2x upsample, 2.0 x shift,
0.5 y shift and 2x downsample. Flatten image, 0.5 gaussian blur, unsharp
mask and final curve and level in Photoshop.
|Optical System:||10” Ritchey-Chretien @ F/7.2, ST-8E NABG/CFW-8A
CCD camera, STV/FSQ-106, AP900GTO mount.
|Comments:||Seeing 3.7 arc-sec. Used
B. Johnston’s pixel shift idea in Photoshop to reduce star bloat and
correct RA elongation. This is a great technique and introduces minimal
artifacts. NGC4302 is the edge-on galaxy.