Jump to content

Narrowband

The Ghost and the Iris - 6 scopes and 9 years


Laurin Dave

Recommended Posts

A wide field image of the Iris Nebula (NGC7023) and the Ghost Nebula (SH2-136, VdB-141) in dusty Cepheus.  The image is made up of data acquired with 6 scope/camera systems over 9 years...  most recently over the last week 7.5hrs lum and 20 mins each RGB on my Esprit100/SX46, 3hrs each RGB GT71/ASI1600 which together gave the wide field framework,  3hrs hrs of Ghost lum and 1hr each RGB taken in August 2019 on the TEC140 Atik460 and TEC140 Moravian8300 at Olly's  @ollypenrice Les Granges observatory, 4hrs Lum and 3 hrs each RGB on the Iris taken in 2018 with my Esprit150/ASI1600 and 12 hrs lum on the Ghost taken by Olly in 2011 (scope/camera combo unknown). 

Processed in APP, Pixinsight and Photoshop.    Hopefully I've done the data justice..

Thanks for looking and thanks to Olly for such great data.. (The Ghost area is somewhat less noisy)

Dave

Iris_Ghost_Final_Levels_23Sept20_SGL.thumb.jpg.d2e9060ffa8fb92a6022c5d3eb66f731.jpg

 

 

  • Like 18
Link to comment
Share on other sites

4 hours ago, ollypenrice said:

That's worked! There's a certain charm to persuading data from different sources to come nicely together.

I love your thread title! It proves we're all mad...

😁lly

Thank you Olly..  In the UK it also gives us something to do when its cloudy...  it also shows that you should save your data as you never know when it'll come in handy...I feel the need to do the same to the Cocoon Data we gathered... probably leave that till next year though and probably go back to the Iris with the Esprit 150 at some point to see what more I can squeeze out of it ..

 

4 hours ago, michael.h.f.wilkinson said:

Lovely image. The result of an epic journey into astrophotography

Thanks Michael...  the first 6 years in this journey are I'm afraid Olly's alone,  just wish I'd started earlier..

4 hours ago, MarkAR said:

Excellent image, well worth pixel peeping the core.

Thank you Mark, yes I think the core has come out well, the stars are a little undersampled at 2 .25"/pp but the detail from the combined luminance of Esprit100 and Esprit150 is somewhat better than I achieved with the Esprit150 alone on my AZEQ6.  

2 hours ago, tooth_dr said:

Beautiful result. Well worth the mammoth effort. 

Thanks Adam....

 

57 minutes ago, tomato said:

Now that’s a proper project duration, on a par with a Solar System probe.  
 

Excellent data combination, was that handled by APP or PI?

Thanks Tomato

Both plus photoshop...   I created a LumMaster from the Esprit100 data in APP.... registered everything else (subs and High Res Masters) to that in Pixinsight using Thin Plate Splines and distortion correction (this seems to largely take account of the optical distortion differences between the scopes)..  then switched off Registration in APP and integrated the RGB subs and then the Esprit100 LumMaster and High Res Masters using Multi Band Blending..  I also used Photoshop to extract the stars from the Esprit100SX46 RGB data to replace those in the GT71/ASI1600 RGB..  

 

Dave

Edited by Laurin Dave
  • Like 1
  • Thanks 1
Link to comment
Share on other sites

3 hours ago, gorann said:

Great image and amazing mix Dave!

Thanks you Goran...   I thought it was about time I posted something "dark and dusty" in Cepheus, I was getting rather jealous seeing all the images you've taken with your new RASA... apologies for missing you off the previous post... I've been staring at the screen too much today..

Dave

  • Like 1
Link to comment
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
  • Recently Browsing   0 members

    • No registered users viewing this page.
×
×
  • Create New...

Important Information

We have placed cookies on your device to help make this website better. You can adjust your cookie settings, otherwise we'll assume you're okay to continue. By using this site, you agree to our Terms of Use.