OIII emissions - NGC 2899

[Tony_]

I have to admit this is a crappy image - I am only posting it for anyone who may be interested in seeing the strong OIII emissions in NGC 2899.


I took it during the last full moon as an experiment.
SCT9.25 @ f/10. modded cooled canon 60d @ 0C. 25 x 120s, ISO 3200 (too high - a lot of noise). I have done some excessive noise removal in photoshop.
Baader 10nm OIII.



Anyway - just to show the OIII emissions. I don't know what the squiggly lines are?



Tony.

[Ken]

Your 60d camera picked up the O111 well, the noise is a problem might have been a warm night. The squiggly lines are hot pixels that appear to move in reality they are in the same place but each sub has moved between exposures. Dark frames with OA guiding will solve the problem, flexing and movement of mirrors or guide scope gives this problem.The movement will show as a blacked out edge or border when you stack the image.