FROM TH2F
constant
0.020082970557049835+-0.016701201953925802
chi2/ndof = 0.010043269295721012
plane
0.06157973529236642+-0.10242603273481729
invpt slope = 0.008119981172732145+-0.012940492293928144
theta slope = -0.045776254659288015+-0.08744877770738639
chi2/ndof = 0.0017520055587275398
from tgraph2D
constant
0.02792055157713398+-0.0017903280587315002
chi2/ndof = 0.000250011415496915
plane
0.07399325132010548+-0.004038245079555015
invpt slope = 0.008348348881515527+-0.0005813130514276363
theta slope = -0.05646597919094564+-0.0037986909050282324
chi2/ndof = 4.792502968647789e-05