FROM TH2F
constant
61.90015751783416+-1.1355996727868192
chi2/ndof = 32.8681379880899
plane
194.81800416919478+-15.633783499631559
invpt slope = 7.6927303226467085+-0.654828173684038
theta slope = -119.64289118425131+-12.298665911143525
chi2/ndof = 28.7893256169359
from tgraph2D
constant
89.25673220312902+-7.136862178112037
chi2/ndof = 2648.609688790217
plane
205.15178151147845+-69.39259573881151
invpt slope = 19.716192747305648+-2.9826326063368884
theta slope = -132.28239251661674+-56.41566142057264
chi2/ndof = 1419.0921424729872