FROM TH2F
constant
0.022590820151130366+-0.0229209055381063
chi2/ndof = 0.010297520126251488
plane
0.08145331020037459+-0.15835602197100287
invpt slope = 0.006015683791870749+-0.03085302653243744
theta slope = -0.05747962109504481+-0.11996929364855505
chi2/ndof = 0.002173937361433922
from tgraph2D
constant
0.03127750466291562+-0.002525535171600992
chi2/ndof = 0.00029340308353815
plane
0.08249453526456053+-0.007460959174948743
invpt slope = 0.005952007876025679+-0.0015384664375030302
theta slope = -0.05634148019636139+-0.006040538839954735
chi2/ndof = 7.83408632797809e-05