FROM TH2F
constant
0.012388900811048256+-0.01590077703801737
chi2/ndof = 0.0047465007493863775
plane
0.01825642282483795+-0.1011155888883779
invpt slope = 0.003985707158107393+-0.013625831916206687
theta slope = -0.009632660764650122+-0.08279466818910164
chi2/ndof = 0.0027408281591213483
from tgraph2D
constant
0.016039447740713062+-0.0009905268015025458
chi2/ndof = 5.298174060264471e-05
plane
0.019638069439523044+-0.005172736961805356
invpt slope = 0.003646707503854309+-0.0006700412829848283
theta slope = -0.008293291123466415+-0.004521480496155059
chi2/ndof = 3.4877146385386145e-05