FROM TH2F
constant
0.011408147244401555+-0.014671334676763959
chi2/ndof = 0.0019344432239183527
plane
0.0384659207232612+-0.22208503075332453
invpt slope = -0.001751710341506401+-0.0070558747540370335
theta slope = -0.01575864717665719+-0.1645997880777692
chi2/ndof = 0.0006733674729640395
from tgraph2D
constant
0.01378527218119361+-0.0006594157122766867
chi2/ndof = 2.4785257651034545e-05
plane
0.0446415565782226+-0.00493410740832517
invpt slope = -0.0018890837728416188+-0.0001735839213183516
theta slope = -0.0196193824726468+-0.0037314934378190685
chi2/ndof = 6.87748358363454e-06