How do I remove this reflection artifact?

[Geoff]

I think this artifact was from the top of the dew shield catching some stray light.  I know how to do it in Photoshop, but have no idea of how to go about it in PI (Very new to this).  Does anyone have any suggestions?
Note added: See my follow up message below
Geoff

[Geoff]

This was my first post on the forum--a bit naive perhaps.  After having become more in tune with the PixInsight philosophy, I now know how to deal with it.  Fix the problem, throw away the bad image and then acquire the data again. The following quote from Juan (in a slightly different context) says it all:

So the only solution to tracking problems is fixing the hardware that is causing them: throw away all wrongly tracked frames, look for the causes of bad tracking in your equipment, analyze and understand them, and fix them. Then acquire the data again. Astrophotography requires the pursuit of excellence, both technically and aesthetically. No software 'magical box' can help you to achieve that.

Geoff

[pfile]

having said that, i wonder if this kind of noise is periodic enough to show up in an FFT? maybe not.