FROM TH2F
constant
11.588583559372367+-0.5382514176000316
chi2/ndof = 24.896773748008968
plane
-39.28229842493613+-4.636087052204985
invpt slope = -6.171591519035719+-0.7330855092399445
theta slope = 60.085058866995794+-4.255700984924959
chi2/ndof = 18.84534678158328
from tgraph2D
constant
43.387944745813655+-7.870268231896612
chi2/ndof = 2787.3504865663267
plane
-170.55153279347599+-45.54259043190869
invpt slope = -18.800932459260636+-5.602335954737443
theta slope = 212.81935020008476+-38.09502253770137
chi2/ndof = 1250.2435320907489