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NGC3699 With external halo?
Hello
I'm still working on this target, but I wanted to share my progress.
It is a 11 h in OIII plus 5,25 h in Ha combined in a bicolor Ha-OIII-OIII. subs are 15 and 30 min long.
This object is not very photographed, or at least I did not find many pictures of it on internet.
My surprise was to see a very faint loop/halo around the subject best seen on the upper left side that is not on any other image I have seen of it.
The halo is only present in the OIII images, and to confirm it I took 6h extra images with 30Min exposure time, besides the 5h I already had.
There is also a small Ha patch on the right I've not seen on other images.
The attached image is a central crop of the image at 100%
Geert
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