FROM TH2F
constant
27.34131368759229+-0.8267604501905021
chi2/ndof = 114.32176312575731
plane
99.71054168244157+-15.694362720362362
invpt slope = -40.58666613398112+-0.7872136801174151
theta slope = 66.23052251007336+-12.442238868758343
chi2/ndof = 42.69141325045235
from tgraph2D
constant
140.46912117071994+-7.610352958811892
chi2/ndof = 2548.368772891173
plane
146.07661065761025+-83.36135327624488
invpt slope = -11.142836822665982+-5.681769865576662
theta slope = 11.87692087601819+-68.89179370940376
chi2/ndof = 2441.037517581629