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William Shaheen | all galleries >> Astronomy >> Celestron EdgeHD 1100 and the SBIG ST-8300M > NGC3628 - Galaxy in Leo 31-Mar-2011 (after collimation)
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NGC3628 - Galaxy in Leo 31-Mar-2011 (after collimation)

NGC3628 - Galaxy in Leo 31-Mar-2011 (after collimation)

13 - 600 second exposures with the SBIG ST-8300M (monochrome) CCD camera at -15C. Baader 2" UV/IR filter. Telescope configuration: EdgeHD 1100 (2800mm, f/10) and no focal reducer, binned 2x2. Image scale of 0.80 arc-seconds/pixel. Mount: Losmandy G11 w/Gemini. Focused using a Bahtinov focus mask. Post processing: dark frame subtraction (15 darks), alignment, min/max excluded average combining in ImagesPlus 4.0, no bias frames and no flat frames; DDP and curves in Nebulosity2. Adaptive Richardson-Lucy Deconvolution in ImagesPlus 4.0 (7x7, 10 passes). Autoguided with a Lodestar autoguider connected to a Stellarvue 50mm finderscope and a Televue 2.5x Powermate (in lieu of 2x Barlow) and PHD autoguiding software.

20110331_NGC3628_Comb-ddpcrvarl.jpg


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