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M 51

M 51 – Whirpool Galaxy


Date/time:
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

Equipment:
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

Acquisition:
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

Processing:
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.

Comments:
This is my first LRGB image with a monochrome camera.  

 

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