FROM TH2F
constant
0.016645699099174256+-0.01843117318909749
chi2/ndof = 0.006733499684434568
plane
0.0786709821099118+-0.1375313000424022
invpt slope = -0.0012960943801458165+-0.018036443622334
theta slope = -0.05060926722487699+-0.11078710994392865
chi2/ndof = 0.002449185066358837
from tgraph2D
constant
0.022861355993248837+-0.001319560015566732
chi2/ndof = 9.402688627312334e-05
plane
0.07043273087603036+-0.006574469560101793
invpt slope = -0.00024219050393300154+-0.000895221212530425
theta slope = -0.04269792164375998+-0.005704086334278395
chi2/ndof = 4.655237983239928e-05