FROM TH2F
constant
59.67869831919708+-1.178081790588785
chi2/ndof = 14.982675536390275
plane
134.54877115437662+-7.11149708014113
invpt slope = 12.518769930902545+-1.4010359205667773
theta slope = -81.20683444223468+-5.683076365360072
chi2/ndof = 8.029618366355987
from tgraph2D
constant
70.37274794467405+-5.490405201443851
chi2/ndof = 1386.6492691510202
plane
158.5667160790132+-21.26303360199799
invpt slope = 15.06507649903282+-4.469229511484977
theta slope = -101.15478815157239+-17.429742909037152
chi2/ndof = 677.0063228406591