Hi
this thing is dim - eg, lots of (narrowband) galaxies shining through it
.
http://astrob.in/295151/0/
There is continuing discussion on just what it is. I assumed that it is a Stromgren sphere and not a PN, so left the internal detail ~as smooth as it appeared in the initial stacks, rather than try to make it look like the shock stuctures found in typical PNs. Also concentrated solely on SNR - all available data was used, including some with poor FWHM - and no deconvolution was applied, so stars are a bit ropey (especially stretched this much)
The bow wave from the motion of the central binary star pair through the interstellar medium is intriguing, as are the two linear features (not much agreement on what caused them). In any event, this was a very satisfying object to image and read about. Thanks for looking. regards Ray
edit: FWIW, the Ha signal in the dimmest outer regions amounted to around 1-2 photon/10 minute sub