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William Shaheen | all galleries >> Astronomy - Astronomical objects, images and astronomy related projects >> APOD Submissions > M1 - The Crab Nebula 07-Feb-2015
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M1 - The Crab Nebula 07-Feb-2015

Distance 6.5 +/- 1.6 kly. North is up, east to the left.

Telescope configuration: Celestron EdgeHD 1400 with the Celestron 0.7x focal reducer (fl=2737, f/7.7).
Camera: Canon EOS 6D unbinned, unmodified, ambient temperature ~60F. 10 - 8 minute exposures at ISO 1600. Image scale: 0.49 arc-sec/pixel. Image capture ImagesPlus 5.75 Camera Control.
Mount: Software Bisque Paramount MX with PEC and ProTrack enabled. Autoguided with an SBIG Sti autoguider, a Celestron OAG (off-axis guider) and a Starlight Xpress AOLF (Adaptive Optics Large Format) device using PHD2 autoguiding software.
Post processing: ImagesPlus 5.0: Calibration, alignment, stacking and DDP using 7 dark frames, 7 bias frames and 7 flat frames, followed by color balance, color saturation, noise reduction, Adaptive Richardson-Lucey deconvolution (13x13 by 10 passes), curves, for contrast, and rotated +90 deg. (North is up.) Cropped and one pass unsharp mask in ThumbsPlus7. Final midtone and background color adjustment in IP.

20150207_M1-Flatted_CombSigMed-IPddpetc-TPadj-IPcolor.jpg


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