NGC 7635 - The Bubble Nebula (Wouter Cazaux)

NGC 7635 - The Bubble Nebula

Revision title: Re-processed, trying to make non-cooled ‘old data’ come to life again with CPR, after 5 months

20210810 - (CAS) NGC 7635 - The Bubble Nebula

What was the experience
Last of my try-out shots with the TS-94EDPH APO + CEM70G + ASI178MC combination …… Well … In all honesty, I have to admit ☺️ … I was so excited about the new scope arriving that I completely over-looked it was suddenly Clear Skies 😳
I rushed outside with the existing (test)rig-setup, although I had planned to replace the camera with a cooled one 🙄. Scope and camera didn’t get the time to get climatized to the outside temperatures, and that’s very much noticeable in the background noise. Hadn’t even figured out what DSO to chose, so I picked an easy target. Tried to remove as much of the background rubble as I could through processing, but the noise is still quite noticeable.
The image is not as good as I would’ve liked, but hey .. progress comes in small steps … Anyway, next time, I’ll be ready to go cool 😎

What’s in the picture(s)
NGC 7635 - The Bubble Nebula - https://en.m.wikipedia.org/wiki/NGC_7635
Quote: “NGC 7635, also known as the Bubble Nebula, Sharpless 162, or Caldwell 11, is an H II region[1] emission nebula in the constellation Cassiopeia. It lies close to the direction of the open cluster Messier 52. The "bubble" is created by the stellar wind from a massive hot, 8.7[1] magnitude young central star, SAO 20575 (BD+60°2522).[7] The nebula is near a giant molecular cloud which contains the expansion of the bubble nebula while itself being excited by the hot central star, causing it to glow.”

How it was done
Mount: iOptron CEM70G
Guiding: ZWO OAG, ZWO ASI290MM, ASIAIR Pro
Scope: TS-94EDPH APO (FL 414mm / 517mm with 0.8x corrector)
Camera: ASI178MC (non-cooled)
Resolution: 1,19”/pixel, FoV 74’
Filter: Optolong L-Extreme
Moon: 5%(+), Bortle 5/6 SQM 19.60
Photons: Gain 125, 300s, 40x (o/w 4 rejected)
Darks 25x
Processing: PixInsight, Adobe Photoshop (Mac)

What have I learned from this
Plan your targets ahead, always be ready … even if you’ve just come back from holiday, all relaxed … the Clear Skies don’t wait for you to show up 😉🤩
Planetary camera’s should be used for planets. For DSO, we’re cool 😎 as of now

Clear Skies everybody! 🤩✨🔭

IG https://www.instagram.com/astrowaut/

Original
B
Final
C

B

Title: Re-processed, trying to make non-cooled ‘old data’ come to life again, after 5 months

Description: 20220123a - Cloudy Nights = Education time 🤩 - Working through my ‘old’ data. Re-processing ‘old data’ in a new way, trying to make something more decent out of data from a non-cooled OSC, that is very noisy and made by a camera that is more intended for planetary instead of for nebula, now 5 months later. Straight processing in PixInsight, but applying the new processing techniques gained since the original capture and processing.
The background and the nebulae is marred by artefacts, colour-blown hot pixels. The stars seem to have hot halos, which seems to come from the original data. Not sure how, if or when I will try to correct this (might just go for a new capture). Given this was with a non-cooled camera, it’s not surprising. I remember it was very warm at night mid-august. Still, I consider this an improvement ….
I’ve made 2 revisions: one as straight HOO, the second with a bit of boosting in the Oiii

Uploaded: ...

C

Title: Re-processed, trying to make non-cooled ‘old data’ come to life again with CPR, after 5 months

Description: 20220123b - Cloudy Nights = Education time 🤩 - Working through my ‘old’ data. Re-processing ‘old data’ in a new way, trying to make something more decent out of data from a non-cooled OSC, that is very noisy and made by a camera that is more intended for planetary instead of for nebula, now 5 months later. Straight processing in PixInsight, but applying the new processing techniques gained since the original capture and processing.
The background and the nebulae is marred by artefacts, colour-blown hot pixels. The stars seem to have hot halos, which seems to come from the original data. Not sure how, if or when I will try to correct this (might just go for a new capture). Given this was with a non-cooled camera, it’s not surprising. I remember it was very warm at night mid-august. Still, I consider this an improvement ….
I’ve made 2 revisions: one as straight HOO, the second with a bit of boosting in the Oiii

Uploaded: ...

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Status	Advanced success
Started	...
Astrometry.net job	5426983
PixInsight job	5EJO2N5MXLITAWLSDRBKF1QXUO7ZMKU4
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	23h20m45s.75
RA (top/left)	23h25m55s.63
RA (top/right)	23h19m01s.65
RA (bottom/right)	23h15m35s.12
RA (bottom/left)	23h22m25s.79

Dec (center)	+61°12′38″.5
Dec (top/left)	+61°10′16″.1
Dec (top/right)	+61°47′57″.7
Dec (bottom/right)	+61°14′15″.3
Dec (bottom/left)	+60°37′15″.10

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