This is a work in progress. I only managed two hours of data between the clouds. Hopefully, I'll be improving on it when conditions are better. Still, it's a lovely galaxy. The pic is one which (I think) looks good at first glance, but faults show up on closer inspection:
- Some sort of ringing artifacts in the bright stars, probably due to deconvolution. Bit of a trade-off here. Stuff up a few bright stars but gain more detail in the galaxy
- A red fringe on one side of the brighter stars. This one really has me puzzled. It looks like a registration error, but registration was done in PI, so it can't be wrong (or can it?) I did the registration twice as a check on possible user error.
http://www.astrobin.com/93786/
Telescope: 12.5" PlaneWave CDK
Camera: QSI540wsg
Mount: AP900
Exposure: 4 x 10min L, 3 x 10 min R and G, 2 x 10min B
Geoff