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Witch's Broom Nebula


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A second attempt at the Witch’s Broom Nebula (NGC6960), this time in narrowband. It took me 3.5 months to acquire the data, which was caused by a combination of poor UK weather and the partial obstruction by trees at my location. Anyway, better late than never....:happy11:

Although imaged in narrowband, I tried to go for realistic looking colours so started with Ha mapped to red and OIII mapped to blue with a synthetic green generated from a Ha/OIII mix.  After a few hue adjustments, I ended up with a colour image which mainly gave blue/reddish stars and nebula. I found that detail could be boosted by creating a super luminance image from the individually stacked narrow band stacks and then deconvolving the result which I then blended into the colour result via Pixinsight’s LRGB process.

The image below was taken with my Esprit 150 and represents 16.5 hours integration time.

1669100051_25.Final.thumb.jpg.495db5b550e3cc47f10ef7a4b6b076e5.jpg

LIGHTS: Ha: 15, OIII: 18 x 1800s; DARKS:30, BIAS:100, FLATS:40 all at -20C.

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    • By alan4908
      A second attempt at the Witch’s Broom Nebula (NGC6960), this time in narrowband. It took me 3.5 months to acquire the data, which was caused by a combination of poor UK weather and the partial obstruction by trees at my location.
      Although imaged in narrowband, I tried to go for realistic looking colours so started with Ha mapped to red and OIII mapped to blue with a synthetic green generated from a Ha/OIII mix.  After a few hue adjustments, I ended up with a colour image which mainly gave blue/reddish stars and nebula. I found that detail could be boosted by creating a super luminance image from the individually stacked narrow band stacks and then deconvolving the result which I then blended into the colour result via Pixinsight’s LRGB process. The image represents 16.5 hours integration time.
    • By Dinglem
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    • By Dinglem
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    • By Toxophilus
      NGC6960 – Witch's Broom Nebula
      Really delighted with this one. We had a lovely evening where I could get some great subframes, it was stable and nice and clear for a change.
      This is a supernova remnant in the constellation of Cygnus. Its original host star exploded some 5000 - 8000 years ago. It is roughly 1,500 light year away from us.
    • By ste7e
      Hi
      My first serious go at a narrowband image taken over a few nights from my back garden in not-so-darkest North Staffs
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      G: 22 x 30s
      B: 22 x 30s
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      Calibration: Bias and flats, no darks (dithering)
      Ha used for Luminace and Red channel
      OIII used for Blue and Green channels
      Equipment list in sig
       

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