Wednesday, 14 September 2022
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Oh Wow

This one dataset justifies joining the syndicate.  What is the protocol here _ I am using syndicate data that I didn't specify - do I wait until the member shares their version, or can I publish anyway?

I never though I would tone down the effect of the oxygen signal in a processing run!  The O signal is good and smooth and strong in the core of the nebula, and the H alpha is beautifully varied.

the first image uses the H alpha signal alone as a luninance - and really accentuates the detail

the second image uses a mean of the normalised H alpha and Oiii signals as luminance - it retains sone of the detail, and enhances the wings of the nebula

I haven't shown my first attempt where I used twice as much Oiii as HA as it is just too smooth and boring

 

Personally I prefer the Ha only luminance - what do you think?

 

Paul

1 year ago
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#5465
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No paul, the data is yours to do as you please the same as all other members. You are a syndicate member after all :)

Ps try the M57 Data !!!!

I am very pleased you are happy so far

Steve


Please ignore my dylexia wherever possible, just be thankful I can control my Tourettes ;)

Things to do, so little time!

Steve
Roboscopes Tea Boy


1 year ago
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#5466
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Forgot to say, I prefer the core on one and the outer shell on the other....


Please ignore my dylexia wherever possible, just be thankful I can control my Tourettes ;)

Things to do, so little time!

Steve
Roboscopes Tea Boy


1 year ago
·
#5467
0
Votes
Undo

Oh Wow

This one dataset justifies joining the syndicate.  What is the protocol here _ I am using syndicate data that I didn't specify - do I wait until the member shares their version, or can I publish anyway?

I never though I would tone down the effect of the oxygen signal in a processing run!  The O signal is good and smooth and strong in the core of the nebula, and the H alpha is beautifully varied.

the first image uses the H alpha signal alone as a luninance - and really accentuates the detail

the second image uses a mean of the normalised H alpha and Oiii signals as luminance - it retains sone of the detail, and enhances the wings of the nebula

I haven't shown my first attempt where I used twice as much Oiii as HA as it is just too smooth and boring

 

Personally I prefer the Ha only luminance - what do you think?

 

Paul

Great image Paul, you have the outer shell beautifully.  Pier 1 is a great scope and I am glad you are happy with the data.

I can see your calibration isn't quite right as I there is some amp glow left behind, this will calibrate out and will allow you to take the data further.

Regards

Peter


Peter Shah - Collimation & Telescope servicing.
Visit my personal imaging website at astropix.co.uk
For Image Processing Tutorials
Contact: pete@ccdimaging.co.uk


We can supply your new high quality Newtonian or Dall Kirkham Astrograph

Peter Shah
Roboscopes Observatory Controller


1 year ago
·
#5468
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I can see your calibration isn't quite right as I there is some amp glow left behind, this will calibrate out and will allow you to take the data further.

Regards

Peter

 

Hi Peter

I had look at the data last night - and yes there was a very slight under calibration in my darks - thanks for that spot.  It arose from me using a mean calculation in the stacking - I changed that to median and the issue went away - Need to look at the stats for that - it maybe because I use 50 subs for my calibration frames at home and the mean and the median of the distribution converge at higher sample numbers so when 20 samples are used we have to be more careful in handling the data - dunno - will have to look that up - good learning experience!

 

Paul

1 year ago
·
#5486
0
Votes
Undo

Oh Wow

This one dataset justifies joining the syndicate.  What is the protocol here _ I am using syndicate data that I didn't specify - do I wait until the member shares their version, or can I publish anyway?

I never though I would tone down the effect of the oxygen signal in a processing run!  The O signal is good and smooth and strong in the core of the nebula, and the H alpha is beautifully varied.

the first image uses the H alpha signal alone as a luninance - and really accentuates the detail

the second image uses a mean of the normalised H alpha and Oiii signals as luminance - it retains sone of the detail, and enhances the wings of the nebula

I haven't shown my first attempt where I used twice as much Oiii as HA as it is just too smooth and boring

 

Personally I prefer the Ha only luminance - what do you think?

 

Paul

Lovely images Paul. Great detail.

Most of us grab the data that we are interested in and process. It is really useful to share our f different versions as they will always be subtly (and sometimes massively) different. And that leads to interesting discussion of “how did you do that?”.

I will certainly have a go at this data when I get the chance. Currently setting up a replacement computer so a bit hampered right now. A tedious job, but hopefully a more stable platform.

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