Strange stacking artefacts

Dear Ed @edarter,

Thank you very much for your question.

The artefacts are in fact clusters of hot pixels. 2 ways to avoid them:

1) first make mosaic panels with normal registration mode, then these panels will have removed these hot pixel clusters because outlier rejection is enabled in automatic integration mode ( 6) Integrate, integrate setting) for normal registration. Then register these mosaic panels with mosaic registration and integrate them to your final mosaic. It is explained in our mosaic tutorial here: https://www.astropixelprocessor.com/mosaic-tutorial-milky-way-to-rho-ophiuchi-by-mabula/

2) Or, do not make mosaic panels, thus load all individual subs and register them as a mosaic. Then in 6) Integrate, you need to disable the automatic integration setting, set it to average and then configure outlier rejection yourself to have these clusters of hot pixels removed properly.

APP assumes in mosaic registration that you provide mosaic panels that are already clear of these artefacts. Reason is that if you enable outlier rejection on a mosaic, your will get less good results, the outlier rejection will harm your data and thus for a mosaic it is much better to first make mosaic panels and then register them as a mosaic, integrating them without outlier rejection 😉 Also, workflow 1) is much faster and much more robust. If you calculate a mosaic from individual subs, the complicated mosaic calculation might need to solve the mosaic for 100s of frames instead of 10 for instance.

Mabula

Thanks Mabula, I will give this a go. I was half way towards this solution to be honest as I've since tried stacking the panels individually and there are no signs of the coloured pixels. I suspect I had sub-optimal settings though when I then went to put the panels together in mozaic mode, so I will look at the tutorial and have another go at that!

Thanks
Ed

Excellent Ed edarter 😉

Where you able to get a clean result now ?

Mabula