Vela SNR mosaic

[Phil Hart]

Originally Posted by Paul Haese

This is cropped in an odd way Phil. I had some rotation from the previous panel and so I had to crop out several hundred pixels vertically. Hence why the aspect ratio looks wrong. My wife thinks it will looks good as a block mounted wall hanging. I might have to have an experiment to see if that works.

Ah yes. Sounds like the nature of doing mosaics near the pole on equatorial mount. Hard to avoid that issue unless you have a camera rotator. You've certainly got the resolution for a big print though.

Phil

[cazza132 (Troy Casswell)]

Wow! Looking good!
I am a believer that mosaics are better than throwing weight of data at a single panel at times. Say - a 2x2 panel mosaic with one quarter of the data thrown at each panel. Each panel looses SQRT(4) = 2 SNR for the same amount of time, but if you have 25% overlap you crop the bad corners anyway. Another thing - the stars are much smaller in the final image. Also, you can be slightly more aggressive with noise reduction, given the extra resolution (which can be selectively done).
On the other hand, gradients and trying to colour match panels can be a pain in the arse. $%#& I know! Airglow variations being one of the biggest culprits for me.
The most important thing is that each panel gets the same treatment with exposure and processing.
Do you plan to run more panels? Looks like a good project with awesome results already!

[dylan_odonnell (Dylan)]

Wow Paul. I keep looking at this region now and then and thinking to myself that it looks great, and difficult! So wide, so faint. Definitely a long term project. Looking great so far!

d