Some seriously faint stuff in Norma

[Stevec35]

A colleague in the UK, Sakib Rasool, periodically sends me rarely imaged areas of the southern sky for me to have a go at and this is one of them, an area in Norma populated by several RCW nebulae. This is in no way a spectacular image but it does show some rarely seen stuff.

Cheers

Steve

http://members.pcug.org.au/~stevec/rcw104_STL11K_FSQ106.htm

[madbadgalaxyman]

Georgelin and colleagues did a pioneering H-alpha survey of much of the southern Milky Way between Norma and Circinus, finding numerous HII regions there; but few or none of these nebulae made it into the NGC/IC.
(I forget the reference.....the relevant papers are sitting there and very deeply buried in one of dozens of tall piles of scientific papers!! No wonder I now keep all my references on computer.)

Some of your faint nebs were imaged by them.

Based on the H-alpha surface-brightness of nebulae seen in their imagery, I once made a list of the most prominent (in H-alpha) emission nebulae in their Ha survey images.
I did some of this, way back in the dark ages, even before PCs.....so some of the coordinates are actually rough estimates made by using a translucent grid that I superposed on a star atlas!!

So here is my list of some southern RCW nebulae that have reasonable H-alpha surface brightness:

114838

The attached notes, many of them from Georgelin, state that RCW103 is a supernova remnant, and that RCW 104 is probably a Wolf-Rayet nebula.

[Moon]

Really nice image Steve.

[tornado33]

Lovely image.
I can see the very bright and tiny Ant nebula almost dead centre, above that and slightly to the right is RCW 103 a Sumernova Remnant, on the left side is RCW 104, ionised by a Wolf Rayet star, its a really interesting bit of sky not often imaged.
Scott

[Stevec35]

Thanks Scott. Might go back to this with another 3-4 hours of Ha at some stage.

[multiweb]

Not familar with this area. Some real nice structure there. :thumbsup:

[Stevec35]

Thanks. Probably needs at least double the exposure to bring it out properly.