Cat's Eye in OIII

This is a combination of 37x5min and 24x1m (for the core) of OIII. Reduced and aligned in CCDStack, then processed in photoshop with an arcsine stretch on import. Lots of blurring on the background and only a little sharpening on the core. Looks like I could re-do the flat here and process the stars separately?

We are still working on autoguiding drift, which really limits the length of exposures. (!) Some of this was taken with a different guide scope (not better - just different) and either there is still something loose that I can't find, or the primary mirror is not as locked as I think. If I don't find something soon, I think I will drill and tab a couple more holes in the back to add some 1/4-20 nylon screws to help lock the mirror. Anyone have any other ideas?

Charlie

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Sweet shot Charlie! That long focal length really got some detail in the center, and I like the depth in the outlying regions as well. Sweet!
Cheers,
Tyler

Hi Charles,

This is looking great!
I'm sure longer subs would make an improvement in your data. If you are chasing guiding issues and want to eliminate flexure and mirror shift as the culprit why not shoot some subs with the internal guide chip in the camera and see how they come out? There is always off axis guiding too.

This is a neat object,are you planning some Ha and SII on this as well?


Jason