FROM TH2F
constant
20.362289611778795+-0.4102235793658244
chi2/ndof = 13.970967523993274
plane
70.32483378252587+-2.5200136437463256
invpt slope = -3.744393640308985+-0.1932230578077575
theta slope = -28.749319338442493+-2.0439689483787853
chi2/ndof = 9.211607160222552
from tgraph2D
constant
34.78290553214522+-2.1142406692345554
chi2/ndof = 567.6917291518026
plane
128.3591617687523+-9.818299639508423
invpt slope = -3.7151271352209907+-0.7227553504819817
theta slope = -73.7298673606776+-8.649993844160969
chi2/ndof = 315.2316819513643