NGC3576 Stars

[billdan]

Hi all,

I have been using startools for 4 weeks and I really love it, and I found I am making better images than before using the traditional histogram stretch and saturation.

I have attached a crop of a region of NGC3576 to show the stars and I am curious if there is a module to complete the colour of the stars.

You will notice e.g. the blue stars are blue on one side of the airy disk and missing on the other side. I should point out these were 15min subs and most likely the stars are all saturated and it is a credit to startools that it found some colour in the stars. In my efforts with Astroart v5 just about all the stars are white using traditional stretching methods.

I have not yet tried the Repair, Synth or Magic modules, so I was curious will any of these modules be any benefit to me for this situation.

Cheers
Bill

[admin]

Hi Bill,

Great to hear ST is performing to satisfaction!

The blue fringing on one side may indicate a slight alignment error during stacking.

Using the Lens module and shifting the blue (as well as the red a tiny bit), the result seems somewhat better aligned which lends weight to that theory;

NGC3576 25x900 crop.jpg (193.06 KiB) Viewed 3658 times

[billdan]

Thanks for your help Ivo, I will have a play with Lens and see what I can do.

I do seem some improvement in your sample. So I'll see if I can do the same.

I wonder would slightly out of collimation also cause this?
Thanks
Bill

EDIT: I had a go last night and yes it works well, surprised by how much I had to shift the blue pixels though, something like 30 pixels to the left.
Bill