FROM TH2F
constant
22.716181554562173+-0.4425258767747578
chi2/ndof = 17.939019046638855
plane
67.9722616279222+-2.865551338453184
invpt slope = -6.88118838114748+-0.21001529447281697
theta slope = -10.861698240852622+-2.433043755037141
chi2/ndof = 8.429913988382973
from tgraph2D
constant
40.37847744063832+-2.1141638404753005
chi2/ndof = 545.3020267184266
plane
107.17885847094047+-10.272974716794835
invpt slope = -6.054618188224896+-0.8086050570761021
theta slope = -43.10472990364105+-8.9698624675375
chi2/ndof = 334.314580715314