FROM TH2F
constant
22.94177062787893+-0.5724854414050637
chi2/ndof = 67.91458279138334
plane
-10.96817086001172+-1.7641183073371707
invpt slope = -2.948403432514671+-0.5012444299847247
theta slope = 43.458575532008965+-1.8017898046968086
chi2/ndof = 61.25591317165555
from tgraph2D
constant
89.12461711321515+-5.480611863290097
chi2/ndof = 2342.894297229018
plane
31.291174445336726+-28.469050485851533
invpt slope = -3.8109111797092075+-4.104326222452903
theta slope = 58.25023605827802+-26.096414204548612
chi2/ndof = 2251.099376194774