Added Colour to NGC 4565
2020-05-26
Here is the first round of adding colour data to the previous NGC 4565 image. Colour doesn’t come through my light-polluted sky very well — I could use a lot more time on the colour channels, but will have to wait until next year because there isn’t much time now between darkness and the target setting.
Exposure
Luminance: 90 minutes (18 x 5 minutes)
Colour: 20 minutes (10 x 2) of each of Red, Green, Blue
Colour: 20 minutes (10 x 2) of each of Red, Green, Blue
Camera
QSI583wsg, with Astrodon LRGB filters
running at -15°C
Image scale 0.69 arcseconds/pixel (luminance), 1.38 (colour)
Image scale 0.69 arcseconds/pixel (luminance), 1.38 (colour)
Telescope
AT8RC
Mount
Paramount MX+
Guiding
Autoguided with Starlight XPress Lodestar
Processing
32 dark frames per sequence
32 flat frames per filter
Sigma-clip mean combination on the darks and flats
Sum-combination on the light frames
Aligned, combined, and deconvolved with CCDStack2
32 flat frames per filter
Sigma-clip mean combination on the darks and flats
Sum-combination on the light frames
Aligned, combined, and deconvolved with CCDStack2