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William Shaheen | all galleries >> Astronomy >> Astro Images by Subject > NGC 253 - The Sculptor Galaxy 07-Nov-2010
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NGC 253 - The Sculptor Galaxy 07-Nov-2010

NGC 253 - The Sculptor Galaxy 07-Nov-2010

11 - 8 min. exposures with the SBIG ST-8300M (monochrome) CCD camera at -10C. Baader 2" UV/IR filter. Telescope configuration: EdgeHD 9.25 (2350mm, f/10) and no focal reducer, binned 2x2 yielding an image scale of 0.95 arc-seconds/pixel. Mount: Losmandy G11 w/Gemini. Focused using a Bahtinov focus mask. Post processing: Calibration, alignment, stacking in ImagesPlus 3.82b using 9 dark frames and 16 bias frames; DDP and curves in Nebulosity2; Adaptive Richardson-Lucy Deconvolution in ImagesPlus (9x9 10 passes). Autoguided with a Lodestar autoguider connected to a Stellarvue 50mm finderscope and a Celestron 2x Barlow and PHD autoguiding software.

20101107_NGC253_CombSigAvg-ddpcrvarl.jpg


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Guest 09-Nov-2010 01:58
Very nice Bill!
And this quality with a G11. I know the ccdastro folks snub that mount but they really should not.
Cheers
Olivier