Search found 247 matches

by Rkonrad
Wed Jan 24, 2024 2:34 am
Forum: Image Processing Troubleshooting
Topic: true colour in globular clusters
Replies: 20
Views: 111570

Re: true colour in globular clusters

Thanks for your work Dietmar - and yes, I will re-shoot next year as the target is now not visible. However, i will contact Mladen, the support person for ITelescope and see what can be done by updating flats or other calibration files. I don't know how they do this but hopefully they can with a mis...
by Rkonrad
Mon Jan 22, 2024 4:10 pm
Forum: Image Processing Troubleshooting
Topic: true colour in globular clusters
Replies: 20
Views: 111570

Re: true colour in globular clusters

Thanks for this! ill need a bit of time to digest what you've written. Meanwhile I could at least re shoot the red and blue frames and then crop the image even more aggressively.

Generally this system produces good colours with other targets.

Thanks Richard
by Rkonrad
Sat Jan 20, 2024 2:21 am
Forum: Image Processing Troubleshooting
Topic: true colour in globular clusters
Replies: 20
Views: 111570

Re: true colour in globular clusters

Thanks for all your hard work Mike - really amazing. A few questions: After checking Stellarium though, I question those blue stars, since their B-V values make them rather Sun-like, and thus perhaps ought to be white. Stellarium provides you with such information? I never knew (how?) There's also a...
by Rkonrad
Tue Jan 16, 2024 4:58 am
Forum: Image Processing Troubleshooting
Topic: true colour in globular clusters
Replies: 20
Views: 111570

Re: true colour in globular clusters

Sorry its taken me awhile to fix this - the correct link to the stacks is here https://drive.google.com/file/d/1D1xdcEMY4UEl8nx0a4mYcsOepei3toe2/view?usp=sharing, https://drive.google.com/file/d/1FsjmerS7SAcKWLQAVPnFy-jrqRpmftkF/view?usp=sharing, https://drive.google.com/file/d/1JKVzxJVK3F58sRaeSO_j...
by Rkonrad
Fri Dec 01, 2023 9:51 pm
Forum: Image Processing Troubleshooting
Topic: true colour in globular clusters
Replies: 20
Views: 111570

Re: true colour in globular clusters

Try this one. https://drive.google.com/drive/folders/ ... drive_link
I dont really understand this. If this doesn't work I'll try dropbox.
by Rkonrad
Fri Nov 24, 2023 6:54 pm
Forum: Image Processing Troubleshooting
Topic: true colour in globular clusters
Replies: 20
Views: 111570

Re: true colour in globular clusters

Here are my stacks for Tucanae 47.

https://drive.google.com/drive/folders/ ... drive_link

Thanks for all your help!
by Rkonrad
Thu Nov 23, 2023 12:09 am
Forum: Image Processing Troubleshooting
Topic: M45 colour balance
Replies: 0
Views: 52824

M45 colour balance

Well here's another query back to back on my last one. Things have piled up since I haven't visited the forum for so long :) I took this image with an 11 inch RASA f2.3. I think there is about 88 min of exposure with 4 minute lights which is a lot of exposure with such a scope. I was amazed to see t...
by Rkonrad
Wed Nov 22, 2023 11:44 pm
Forum: Image Processing Troubleshooting
Topic: true colour in globular clusters
Replies: 20
Views: 111570

Re: true colour in globular clusters

Sorry, I've been away for a week or so and won't be back for several days. I will post a Dropbox of my stacks and I'll also restack them with a different programme though my m13 looks the same (used with a different scope and osc ). Looks like Ivo may be away or busy but I'd love his view on this as...
by Rkonrad
Tue Nov 14, 2023 9:24 pm
Forum: Image Processing Troubleshooting
Topic: true colour in globular clusters
Replies: 20
Views: 111570

Re: true colour in globular clusters

So I tried copying the information from the log of prior rgb images, applied and got this https://www.flickr.com/gp/rkonrad/74Pw0t51je.
Now too blue. I would love to hear Ivo's take on this problem if he has time.

Thanks! Richard
by Rkonrad
Tue Nov 14, 2023 7:08 pm
Forum: Image Processing Troubleshooting
Topic: true colour in globular clusters
Replies: 20
Views: 111570

Re: true colour in globular clusters

You did a lot of work Mike - thanks! I've used this scope a lot as it is one of the "free" scopes at Itelescope. Here are few other rgb images I took with the same setup. https://www.flickr.com/gp/rkonrad/06RT3ZPee4 (2 pictures). Did you want to see all the light frames or just the stacked one? The ...