FROM TH2F
constant
5.190902030800948+-0.29916268271063073
chi2/ndof = 0.3566929424409451
plane
11.100505787996426+-3.5360777519446973
invpt slope = -0.3719285901340699+-0.15521074830630519
theta slope = -3.6553402453616517+-2.769107838711722
chi2/ndof = 0.21038403860236982
from tgraph2D
constant
5.548773997956682+-0.131944649494371
chi2/ndof = 1.0793822125544694
plane
10.593839667481554+-1.281617959940518
invpt slope = -0.20459408145501784+-0.05741675099026376
theta slope = -3.5052710358605457+-0.996601507763685
chi2/ndof = 0.7689124392686192