The Bat, Eastern Veil Nebula, ngc6995

I need to find a way to take better flat frames, this image was subject to a wretched double gradient which made processing rather awkward. I'm pretty sure the origin of this was in the flat frame (actually i should analyse the master flat to test this out...)

 

I had been having issues with a definite banding across the centre of the image, but after much headscratching and trial and error experimentation I managed to work out that that was introduced by some poor bias frames.

 

What a minefield astrophotography can be! Still the result is ok, though I should have used longer subs.

 

90x120 second subframes, total integration 3 hours.

 

Imaging:

Skywatcher Evostar 150,

QHY163C with Astronomik CLS filter.

Guiding:

190mm focal length finder-guider,

Orion SSAG.

All on

Skywatcher HEQ5 Pro

 

Captured using SharpCap. Guided with PHD2.

 

Stacked and processed in DSS, Fitswork and Gimp

 

24th August 2017

Cambridge, UK

Done