[PRejto (Peter)]

Nothing much from SB yet so I tried Pempro last night during a lucky break in the clouds. Remarkably I got my first positive result. My measured PE in Pempro (same camera, resolution, same everthing except using Pempro instead of Bisque TCS) measure my PE as 2.6 arcsec peak to peak (vs 2.2 in TSX) after 9 worm cycles in not great seeing. After applying the correction it is now .7 arcsec peak to peak.

Reasoning that there can only be one correction curve that "works" it seemed possibly interesting to compare results from TSX to Pempro and see what the differences might be. I used data collected a few nights ago, a run of 44 min and compared it to the Pempro results from last night. The 44 min data was collected with a position angle of close to zero with the telescope pointing west, as it was for the data collection. Therefore the "west" selection would normally not be necessary to check (which flips the data vertically).

#1 just places the two curves on top of each other
#2 Better fit with large phase shift.
#3 Bisque curve flipped vertically. Shows phase error, possible match but there are obvious differences in curves.

If this analysis is correct there are two possible problems with the TSX PE calculation. Something is causing the data not to align properly with the worm index, and there might be something not correct about the use of the "west" selection. (though I think the fit is better with the curve not flipped vertically which would mean the major problem is that the curve is just out of phase with the true worm position).

I will be adding this to the discussion at SB.
Thoughts?

Peter