FROM TH2F
constant
0.020073281848453355+-0.020036607422031106
chi2/ndof = 0.008437941691313736
plane
0.0622663787906675+-0.1650873257835929
invpt slope = 0.009030780689277878+-0.0197299412343538
theta slope = -0.04585811519534155+-0.1350817587390001
chi2/ndof = 0.0015742009274737588
from tgraph2D
constant
0.02639616831686989+-0.002121056033152115
chi2/ndof = 0.0002474383282676944
plane
0.06950607573082032+-0.005931490409082755
invpt slope = 0.009883632864807838+-0.0006624649324942605
theta slope = -0.0522619605248884+-0.004921588046346967
chi2/ndof = 2.95059131542551e-05