FROM TH2F
constant
0.034615793592875595+-0.015668506062640458
chi2/ndof = 0.022195591650691484
plane
0.05333603944147022+-0.0882526005393738
invpt slope = 0.012546929745867434+-0.008252532615719396
theta slope = -0.038508542826459456+-0.07438670788511237
chi2/ndof = 0.00482022838838291
from tgraph2D
constant
0.0541879375065262+-0.0028880356490303197
chi2/ndof = 0.0012344309868203467
plane
0.05823897277828159+-0.007361354106216681
invpt slope = 0.014179592050220416+-0.0006788201360905164
theta slope = -0.04351743010108369+-0.006629062708648835
chi2/ndof = 0.00031192936480387565