FROM TH2F
constant
0.01601084526177492+-0.02138814442113841
chi2/ndof = 0.006188429732341889
plane
0.005689189962336409+-0.05203660997924678
invpt slope = 0.02294992450324361+-0.05370009642959053
theta slope = -0.005671576893578674+-0.08697979220393412
chi2/ndof = 0.00076419222579286
from tgraph2D
constant
0.017638635903885657+-0.00185070025360934
chi2/ndof = 0.00016440438857746558
plane
0.006280440448989541+-0.0012668770700980324
invpt slope = 0.021561300335387515+-0.001129749157542592
theta slope = -0.0022150324248916614+-0.0023927922351204478
chi2/ndof = 1.871955299799075e-05