Horse Head Ha 17.5 hours

[gregbradley]

That's super Paul. Very detailed and smooth. Excellent.

Greg.

[jase (Jason)]

Impressive result so far Paul. I like the composition in order to fit the key features in the fov. You could have told me it was 8hrs or 30hrs and I'd be none the wiser. There does come a point of diminishing returns whereby all mega data begins to offer is a greater choice on sub quality selection for inclusion in the combine. This in turn can make processing easier. Just don't loose site of the fact that its not always about how much data you acquire, its the quality of the data you acquire.

-Asymptote-
Back in 2009, AIC Hubble Award Lecturer Tony Hallas did a presentation of CCDnoise and the point of diminishing returns, aka Asymptote. You may want to check out the presentation. http://www.aicccd.com/archive/aic200...s-ccdnoise.pdf - Note its 75Mb in size so download it before viewing. The presentation doesn't read well, you had to be there but I can tell you a few in the crowd were surprised including me.

I'm certainly not laughing at your mega data addiction. Did however get a chuckle out of your OIII attempt. Rule number one, research your target.

[Paul Haese]

Originally Posted by jase

Impressive result so far Paul. I like the composition in order to fit the key features in the fov. You could have told me it was 8hrs or 30hrs and I'd be none the wiser. There does come a point of diminishing returns whereby all mega data begins to offer is a greater choice on sub quality selection for inclusion in the combine. This in turn can make processing easier. Just don't loose site of the fact that its not always about how much data you acquire, its the quality of the data you acquire.

-Asymptote-
Back in 2009, AIC Hubble Award Lecturer Tony Hallas did a presentation of CCDnoise and the point of diminishing returns, aka Asymptote. You may want to check out the presentation. http://www.aicccd.com/archive/aic200...s-ccdnoise.pdf - Note its 75Mb in size so download it before viewing. The presentation doesn't read well, you had to be there but I can tell you a few in the crowd were surprised including me.

I'm certainly not laughing at your mega data addiction. Did however get a chuckle out of your OIII attempt. Rule number one, research your target.

Thanks Jase, Yes the data quality is uppermost in my mind. I have a FWHM that I am prepared to accept and beyond that it gets rejected. My recent image of NGC55 had over 30 hours of data captured but only 17.5 made it to the image.

You're 100% correct about research. I had thought I had seen a narrow band image of this before but I only lost half a night. Next time I will be more proactive prior to imaging.

[pvelez (Pete)]

That is a seriously busy area of the sky. It really stands out in your shot.

Very smooth Paul. You should be quite pleased with that one

Pete

[Astroman (Andrew Wall)]

Awesome Paul great detail, love to get into NB imaging one day, would suit this location I think... I have a special like for Ha images in B&W.

[Stevec35 (Steve)]

A seriously good horsehead Paul. Very smooth - excellent detail.

Cheers

Steve

[leinad (Dan)]

Very nice. That's interesting about the brightness increase mentioned?
Curious, what was that ADU difference Min/max with the 17hrs say to the sum of 8hrs.

[Paul Haese]

Originally Posted by leinad

Very nice. That's interesting about the brightness increase mentioned?
Curious, what was that ADU difference Min/max with the 17hrs say to the sum of 8hrs.

I'll check Daniel and get back to you.

[E_ri_k (Erik)]

Wow Paul, thats awesome Time well spent I think I prefer this one in BW/Ha than colour. Good work!

Erik

[nandopg]

Hi Paul,
Extraordinary image !! So much nebulosity in there showing some delicate details very rare to be seen.

About O3 you are right, just some in Flame and that is it. However, there is some good data in Sulfur III that might worth the capture and the creation of a bi-color mapped image.

Congratulations on this amazing image !

Fernando

[dvj (John)]

Excellent work! Great tonality in this image.

jg

[Paul Haese]

Originally Posted by leinad

Very nice. That's interesting about the brightness increase mentioned?
Curious, what was that ADU difference Min/max with the 17hrs say to the sum of 8hrs.

Using CCDinspector the 8 hour image had an ADU of 1545 and the 17.5 hours image an ADU of 397. I don't know how accurate that would be, I am assuming that the lower ADU in the larger integration means the image background is brighter. Perhaps I am wrong. Happy to be corrected.

[Paul Haese]

Originally Posted by nandopg

Hi Paul,
Extraordinary image !! So much nebulosity in there showing some delicate details very rare to be seen.

About O3 you are right, just some in Flame and that is it. However, there is some good data in Sulfur III that might worth the capture and the creation of a bi-color mapped image.

Congratulations on this amazing image !

Fernando

Thanks Fernando, but I think I will pass on this one. I am not sure I would like a bi-colour using Ha-SII. Maybe if I get time later in the season.

[Paul Haese]

Originally Posted by dvj

Excellent work! Great tonality in this image.

jg

Thanks John.

[Rigel003 (Graeme)]

Just caught up with this Paul. Very nice, and to think you were asleep while you took this. Looking forward to the colour version.

[Paul Haese]

Originally Posted by Rigel003

Just caught up with this Paul. Very nice, and to think you were asleep while you took this. Looking forward to the colour version.

Yes all part of the scheme of things Graeme. I can also do Planetary on those nights that the planets are available at a reasonable hour and I can be collecting DSO data while I am doing that.

[SpaceNoob (Chris)]

Great data Paul, if I could go mega I would (more so lots of decent subs), not quite there yet with my semi mobile setup. Results definitely speak for themselves! I've been following your dome thread quite closely, once you're up and running I have no doubt the effort will be well worth it.