FROM TH2F
constant
0.0183199386312498+-0.030265441208802996
chi2/ndof = 0.0006626206974763855
plane
0.021037526434696068+-0.3651421803529544
invpt slope = 0.003237233090152173+-0.048832016008624274
theta slope = -0.006157408944514301+-0.28689658778818067
chi2/ndof = 0.0002765846832686116
from tgraph2D
constant
0.01820143488019051+-0.0008387481793693318
chi2/ndof = 1.5476967184698967e-05
plane
0.020834444336302257+-0.005844457400563831
invpt slope = 0.003581011064989787+-0.0007029872123036585
theta slope = -0.006348574891492539+-0.004671909359320211
chi2/ndof = 5.144237824452892e-06