It would be good if I could get some input from the Pixinsight users on the this forum regarding a thread that I have been running on the PI forum to do with issues that I have noted with my master dark frames. The link to the PI
forum thread is here..
The summary of the issue is that I have noticed vertical bands in my master dark frames which are not present in any of the individual sub frames. If I play with the pixel rejection settings and drop down the 'high' ranges I can make the vertical bands go away but I would like to understand why they are there and if it matters if I adjust the rejection metrics in this way.
I have uploaded the results of my testing with 300s dark frames to a shared drop box folder if anyone wishes to have a look let me know what you think. There are two dark frames along with the PI process icons used to produce them.
Link to shared dropbox folder is here.
Many thanks,
Rodney.