FROM TH2F
constant
0.01816891815274171+-0.01566926676220788
chi2/ndof = 0.007341596597869981
plane
0.0035661704463187715+-0.037043960200014485
invpt slope = 0.015330485126290488+-0.021571191196294217
theta slope = 0.0012228684176429764+-0.05302814640072563
chi2/ndof = 0.00042430820575265496
from tgraph2D
constant
0.021984683425523694+-0.0015866673387108217
chi2/ndof = 0.00022405867868625356
plane
0.0035494542919428124+-0.0010516648831923171
invpt slope = 0.015756530844578155+-0.0005327319420449665
theta slope = 0.0015849131995627579+-0.0015664813582115902
chi2/ndof = 2.0224918909185375e-05