FROM TH2F
constant
0.04281182379428871+-0.018147223518442567
chi2/ndof = 0.02004900530603085
plane
0.05776896426637679+-0.12110706160804671
invpt slope = 0.010125066698025719+-0.00875362054225355
theta slope = -0.03501335174050249+-0.09903648051364392
chi2/ndof = 0.00916513314564113
from tgraph2D
constant
0.06051535474070438+-0.003309335016978076
chi2/ndof = 0.0014894309627473833
plane
0.1024767230424522+-0.012582737163548926
invpt slope = 0.012447665625310342+-0.0009573639794776221
theta slope = -0.07259971086664015+-0.010724382334973082
chi2/ndof = 0.0006285597627470904