FROM TH2F
constant
0.02000632088152385+-0.01826030343390466
chi2/ndof = 0.017087056877836286
plane
0.06690658197147098+-0.11001730743624936
invpt slope = 0.005839312538508588+-0.020844761917650494
theta slope = -0.04799333218466841+-0.09006666492627717
chi2/ndof = 0.010321626609905477
from tgraph2D
constant
0.03400441917152701+-0.004623190738636455
chi2/ndof = 0.0014106769119257509
plane
0.13342098689163373+-0.017848832825372737
invpt slope = 0.005100468448891574+-0.0038415172859322497
theta slope = -0.10360646664423381+-0.01587344537296456
chi2/ndof = 0.0008423511358068411