FROM TH2F
constant
0.009567525109868512+-0.011075223628200936
chi2/ndof = 0.016593576094015246
plane
0.08463611663871909+-0.12761805581350516
invpt slope = 0.001969117533538116+-0.00550325785378214
theta slope = -0.06019225658319533+-0.09770302292965312
chi2/ndof = 0.011609649195841808
from tgraph2D
constant
0.025820439239691434+-0.002656333473961429
chi2/ndof = 0.0005927130320814508
plane
0.10247088430460319+-0.02099424305173827
invpt slope = 0.005498269823472199+-0.0008154591857177329
theta slope = -0.07479078480403836+-0.016749492831276937
chi2/ndof = 0.0003654372721770052