FROM TH2F
constant
0.04200661438038012+-0.01751050036115273
chi2/ndof = 0.02069129989310625
plane
0.028176202906573973+-0.0875535445602998
invpt slope = 0.011667299915273226+-0.008988102772720854
theta slope = -0.014212669410394329+-0.07373893903092772
chi2/ndof = 0.008392809617757157
from tgraph2D
constant
0.06051087154719623+-0.0030139775591722117
chi2/ndof = 0.0012990206840204882
plane
0.07483624875541008+-0.008928816748413873
invpt slope = 0.01327828245060719+-0.000729879472084545
theta slope = -0.05269555940244973+-0.007605378993631078
chi2/ndof = 0.0003740974648631233