FROM TH2F
constant
0.01692233622039806+-0.018396921602067046
chi2/ndof = 0.006307908752344789
plane
0.0047906669413177085+-0.04319399255499728
invpt slope = 0.01772266005200177+-0.034687054533707844
theta slope = -0.0007892469530663164+-0.06603203139796429
chi2/ndof = 0.0010220418229839677
from tgraph2D
constant
0.019250669918386254+-0.001668916430633226
chi2/ndof = 0.00017825805135756416
plane
0.004412320043399298+-0.0013136850154250833
invpt slope = 0.01809247071035095+-0.0009270604610611905
theta slope = 0.0018708848238266705+-0.002173714293359948
chi2/ndof = 2.5171427426065126e-05