FROM TH2F
constant
4.338991837941028+-0.26243644230299357
chi2/ndof = 46.42929138884219
plane
63.26533785597505+-2.539391232435378
invpt slope = -14.481301217908516+-0.4589905013377968
theta slope = -16.48452771198116+-1.5805959174658952
chi2/ndof = 30.06863100865756
from tgraph2D
constant
56.27896548146197+-4.6396786846019085
chi2/ndof = 1506.863281219114
plane
5.7076159206183235+-21.298895344393113
invpt slope = -16.250606369200266+-3.4301375943105805
theta slope = 71.87446849353289+-19.02860907594838
chi2/ndof = 973.1365721790954