FROM TH2F
constant
6.510485450731286+-0.329405662873043
chi2/ndof = 0.15123351495903095
plane
4.959118700868608+-0.8569088244971225
invpt slope = 0.1053090261851991+-0.582559412798187
theta slope = 2.7837446137168396+-1.0409718750887156
chi2/ndof = 0.030436137992967995
from tgraph2D
constant
6.595758491679388+-0.12019685268382704
chi2/ndof = 1.0979935381093513
plane
5.120189575187058+-0.11346963623017323
invpt slope = 0.040397609107445456+-0.07864869827150879
theta slope = 2.7225227707201265+-0.15555971060331142
chi2/ndof = 0.21594590157407456