Ryderscope
29-08-2017, 11:04 PM
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. (https://pixinsight.com/forum/index.php?topic=11419.msg71053#msg7 1053).
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 (https://www.dropbox.com/sh/hk3llbbu3eaj77r/AACyTVY5QOCLbJo_EWYfdzlSa?dl=0).
Many thanks,
Rodney.
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 (https://www.dropbox.com/sh/hk3llbbu3eaj77r/AACyTVY5QOCLbJo_EWYfdzlSa?dl=0).
Many thanks,
Rodney.