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Old 19-02-2018, 08:57 PM
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CTB 1 - supernova remnant in Cassiopeia

I posted an image of CTA 1 a little while ago. Here's it's somewhat brighter brother, CTB 1.

Supernova remnant CTB 1 in Cassiopeia is the remains of a violently exploding star. It's approximately 10,000 light-years away and occurred between 7,500 and 11,000 years ago, shortly before I went to school.

Captured at SRO California, Aug-Nov, 2017.

Scope: Ceravolo C300 @ f/4.9 = 1470mm FL
Mount: AP1100
Camera: FLI PL16803
Filters: Astrodon
Image scale: 1.26 arcsec/pixel (Drizzled to double res)
Exposures: 11x300s R, 11x300s G, 11x300s B, 49x1800s Ha, 53x1800 Oiii, 55x1800s Sii (total: 81.25 hours)
Processing: PixInsight 1.8.5

Processing credit: Rick Stevenson
Acquisition credit: Scott Johnson, Augusto Hernandez, John Kasianowicz, Daniele Malleo, Jose Mtanous and Rick Stevenson

Bigger version on Astrobin: https://www.astrobin.com/full/334214/0/
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Click for full-size image (CTB1_v3_crop_tc-sml.jpg)
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Old 19-02-2018, 09:08 PM
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Old 19-02-2018, 09:14 PM
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Thanks, Louie
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Old 19-02-2018, 09:19 PM
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Wonderful image Rick!
Good onya for showing us something really new & different, exquisitely framed & processed too.
Top stuff
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Old 19-02-2018, 09:20 PM
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Wonderful image Rick!
Good onya for showing us something really new & different, exquisitely framed & processed too.
Top stuff
Thanks, Andy. Very kind of you!
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Old 19-02-2018, 09:32 PM
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Absolutely beautiful Rick!

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Old 19-02-2018, 09:54 PM
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Wow Rick! that's got punch, love the striking colours.

Josh
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Old 19-02-2018, 10:04 PM
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Stunning Rick.

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Old 19-02-2018, 10:13 PM
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Well, never seen this one before mate...striking and rather intriguing object Rick, lovely vibrant colours too... looks like the head of a sperm

Mike
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Old 20-02-2018, 12:28 AM
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Stunning Rick. How did you map the filters/colors?
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Old 20-02-2018, 07:10 AM
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A magnificent image Rick.

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Old 20-02-2018, 07:49 AM
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Absolutely beautiful Rick!
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Originally Posted by Joshua Bunn View Post
Wow Rick! that's got punch, love the striking colours.
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Originally Posted by batema View Post
Stunning Rick.
Thanks Steve, Josh & Mark!

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Originally Posted by strongmanmike View Post
Well, never seen this one before mate...striking and rather intriguing object Rick, lovely vibrant colours too... looks like the head of a sperm
Ta, Mike! I think the shell rupture at the top LHS adds to the resemblance.

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Stunning Rick. How did you map the filters/colors?
Thanks, Joel. I mapped Ha as red, Oiii as Blue/Green (then mapped cyan to a more blue shade) and used Sii as a mask and reduced green. The Sii didn't really contribute a lot.

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A magnificent image Rick.
Thanks, Greg!
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Old 20-02-2018, 08:23 AM
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Great shot. Looks like a giant jellyfish.
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Old 20-02-2018, 08:46 AM
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Yes very dramatic and a rare one, onya Rick!
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Old 20-02-2018, 11:21 AM
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Lovely - the blue certainly adds to it.
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Old 20-02-2018, 03:00 PM
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Great shot. Looks like a giant jellyfish.
Thanks, Marc. That's a bit more family friendly thank Mike's sperm

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Originally Posted by SimmoW View Post
Yes very dramatic and a rare one, onya Rick!
Thanks, Simon!

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Lovely - the blue certainly adds to it.
Ta, Troy. I always like to push the blue a bit
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Old 20-02-2018, 04:46 PM
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Nice Rick, very nice. Colour, detail and star colour. All good.
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Old 20-02-2018, 07:04 PM
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An amazing looking object and an amazing looking photo of it.

Beautiful work Rick!

I love the colours and detail.

Ross.
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Old 20-02-2018, 09:20 PM
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Looks much like the Spaghetti Nebula you did a while back with the Rokinon 135mm
Faint sucker given the 80+ hours!
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Old 20-02-2018, 09:38 PM
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Originally Posted by Paul Haese View Post
Nice Rick, very nice. Colour, detail and star colour. All good.
Thanks, Paul.

Quote:
Originally Posted by Ross G View Post
An amazing looking object and an amazing looking photo of it.

Beautiful work Rick!

I love the colours and detail.
Thank you, Ross.

Quote:
Originally Posted by Atmos View Post
Looks much like the Spaghetti Nebula you did a while back with the Rokinon 135mm
Faint sucker given the 80+ hours!
It does look a bit like that, Colin. Only much, much smaller! They were both very faint...
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