FROM TH2F
constant
8.324959591984209+-0.29602559621541025
chi2/ndof = 1.5526947735699168
plane
25.35037235198963+-1.7528261141604857
invpt slope = -0.9111984455394018+-0.22380111613141387
theta slope = -12.63358731713103+-1.368688292402932
chi2/ndof = 0.5298046637081053
from tgraph2D
constant
9.774484712062282+-0.44741608676303257
chi2/ndof = 20.01811546092895
plane
28.745855804229233+-1.2056982232889177
invpt slope = -0.8931788287576825+-0.17356929380393865
theta slope = -15.359979828808687+-1.0006228768887286
chi2/ndof = 5.586699843362577