FROM TH2F
constant
0.012942973128631964+-0.02937456170299885
chi2/ndof = 0.0056573145805520805
plane
0.0909185967958637+-0.44073798612803755
invpt slope = -0.0038996599281910464+-0.07025559048798917
theta slope = -0.06321323692069973+-0.34307667449954016
chi2/ndof = 0.0036396402102301436
from tgraph2D
constant
0.017135722326608056+-0.0018279359468722199
chi2/ndof = 6.014429686562836e-05
plane
0.061102889114354526+-0.025272747448546632
invpt slope = 0.0005331173351532956+-0.002747991644539913
theta slope = -0.038920469616109385+-0.021238497182070673
chi2/ndof = 5.255814822611789e-05