M 51

M 51 – Whirpool Galaxy

19.04.2009 22:00 to 20.04.2009 01:25
20.04.2009 22:30 to 21.04.2009 01:15

Ambient conditions: 10°C, transparency 5/5, seeing 4/5
Location: Trier, Germany

Telescope: Celestron C8 with AlanGee focal reducer at f/6.3
Mount: CGE
Guiding: SSAG on 70mm Bresser Achromat guidescope, PHD
Camera: ATIK 16 IC-S monochrome
Filters: Baader L,R,G,B

Software: CCDSoft V5
FOV, Image scale: 15.4 x 11.0 arcmin, 1,21 arcs/pixel
Sub-exposures: L/R/G/B = 60 / 60 / 60 / 60 min
subframes of 5min at 1:1, calibration with bias and flats, no darks

Calibration and stacking in Images Plus 3.75,
LRGB composite using Carbonis Actions, curves, levels adjustments, color balance in CS3,
Carbonis Actions for background noise reduction.

This is my first LRGB image with a monochrome camera.  


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