FROM TH2F
constant
19.997924466251632+-0.6388434138049006
chi2/ndof = 14.558010883359836
plane
102.9457662672752+-5.2023595435672885
invpt slope = -5.26039820097262+-0.6413006873538878
theta slope = -60.83660810162756+-3.9809024106746684
chi2/ndof = 9.513300758474305
from tgraph2D
constant
33.442323352611304+-2.276422008179833
chi2/ndof = 285.0153439321014
plane
131.39146123284388+-9.998466414182237
invpt slope = 0.056063438374326785+-1.2766135235899396
theta slope = -86.54774449652845+-8.722647105435465
chi2/ndof = 101.92121080807739