FROM TH2F
constant
0.03832483728350886+-0.018925539620598734
chi2/ndof = 0.014217240834761115
plane
0.062458143897709456+-0.16290416374324912
invpt slope = 0.006761241204991641+-0.008931816476392067
theta slope = -0.03916008272198405+-0.13225698616394993
chi2/ndof = 0.007058975367923909
from tgraph2D
constant
0.051090090404003294+-0.002720997631190815
chi2/ndof = 0.0008218249202474984
plane
0.11122498255942065+-0.012027019072315816
invpt slope = 0.007606672851807958+-0.0007923654085556446
theta slope = -0.07911108501099456+-0.009905961472023555
chi2/ndof = 0.0003258994606983063