Hello! I'm having trouble getting the error range of my T PYX observations down. They seem to run 0.3 to 0.5 mags. Last night, I averaged ten 60 second images through my ST-402 with BVIC and my 8 inch LX200 classic scope. The error range was still over 0.4 magnitudes. MPO Connections to control the run; AIP4Win to calibrate and stack, and Canopus, to extract the magnitudes and error ranges.
My error ranges for the targets in evening's run were typically under 0.1 magnitude.
What should I look for in order to determine the cause for the high error range? Thank you and best regards.