FROM TH2F
constant
0.02154420080161808+-0.01806729877187591
chi2/ndof = 0.02500954361039563
plane
0.05401958025214332+-0.12333801760040766
invpt slope = 0.005368102888946406+-0.01723291798360819
theta slope = -0.03533115341911023+-0.09601853324291386
chi2/ndof = 0.019923517298627447
from tgraph2D
constant
0.04367787744233508+-0.005195652828872237
chi2/ndof = 0.001889636582028099
plane
0.16601677026325004+-0.019953092781490003
invpt slope = 0.00966750492196392+-0.0033322070625764295
theta slope = -0.13133886937752948+-0.01685557149464186
chi2/ndof = 0.0009163994355805032