NGC3699 With external halo?

[gvanhau]

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

[Paul Haese]

First time I have seen this object. Your image has good colour and detail is also good. I wonder what your final result will look like.

[RickS]

Nice catch, Geert. There seem to be quite a few planetaries with faint Oiii halos that are poorly known or completely undiscovered.

Cheers,
Rick.

[Stevec35]

Yep - second that. It's a nice image. There is considerable research into OIII halos around planetaries going on right now.

[gvanhau]

Thanks Paul Steve and Rick.

I'm still working on it, since weather is not very stable at the moment.

Regards
Geert

[tilbrook@rbe.ne]

That's nice work Geert!:thumbsup:

Good detail from a 1 arc minute planetary.

Cheers,

Justin.