FROM TH2F
constant
11.851507555465528+-0.4600370239037411
chi2/ndof = 47.17108775024808
plane
146.1245797266253+-7.170910444770274
invpt slope = -11.42965053034366+-0.3165141099782325
theta slope = -63.731555131594924+-5.438400002309285
chi2/ndof = 23.55859826765775
from tgraph2D
constant
56.17957056951094+-5.426816641107747
chi2/ndof = 1767.0203297904047
plane
325.8796840206344+-55.31156221633572
invpt slope = -4.216571156458696+-2.608269407217332
theta slope = -211.41472040801568+-45.08508528118116
chi2/ndof = 1259.9994975865652