FROM TH2F
constant
0.017623773463677023+-0.014660288764143619
chi2/ndof = 0.006109313792124872
plane
0.004925086474450328+-0.03450740243968746
invpt slope = 0.013247516497855246+-0.019589774403514074
theta slope = 0.00011765971684734623+-0.04552948745709867
chi2/ndof = 0.00045922149744800087
from tgraph2D
constant
0.020623559644677034+-0.001379695787529952
chi2/ndof = 0.0001865489256853565
plane
0.0051565939129015175+-0.0011815998462578507
invpt slope = 0.01394756298707588+-0.0005927428989031574
theta slope = -0.0009342736028875964+-0.0016065535413819765
chi2/ndof = 2.8051802825299024e-05