FROM TH2F
constant
20.193444883154765+-0.6486114157647481
chi2/ndof = 60.47712066098557
plane
69.1631903094449+-5.62873815904087
invpt slope = -6.6959443481716425+-0.39314240527752914
theta slope = -23.333769167665693+-4.5147378028299885
chi2/ndof = 55.47376970169908
from tgraph2D
constant
78.78370417459796+-7.37404632706671
chi2/ndof = 2936.3342010523106
plane
104.38624830640703+-68.22902180123116
invpt slope = 4.448541083185105+-5.4414252986248925
theta slope = -27.626634694681037+-56.71627869021829
chi2/ndof = 3004.558700434302