FROM TH2F
constant
0.014231122689436224+-0.012863831887440978
chi2/ndof = 0.03930960365954108
plane
0.06008001402555935+-0.08482488215511914
invpt slope = 0.01049626204041769+-0.012302156845277122
theta slope = -0.04340032536696322+-0.06127965799459954
chi2/ndof = 0.016825702848788066
from tgraph2D
constant
0.04981827607739266+-0.00581003722702011
chi2/ndof = 0.0031056009974225855
plane
0.15345423617846282+-0.01964409210747703
invpt slope = 0.01830702441091419+-0.003055496077788556
theta slope = -0.13125066475584274+-0.016853142851778583
chi2/ndof = 0.0015029543345310894