FROM TH2F
constant
22.97437006203142+-0.8101916884113135
chi2/ndof = 5.838663460442806
plane
2.281667557667372+-1.86509239345855
invpt slope = 23.643812255747775+-1.9252602339452292
theta slope = 17.695705447320677+-3.29265976303547
chi2/ndof = 0.6333258549980098
from tgraph2D
constant
23.7304951510262+-1.9551283120370406
chi2/ndof = 183.4812825414678
plane
5.515827148784676+-1.3652333786259536
invpt slope = 21.542167958557506+-1.2174592890068618
theta slope = 16.019838647312163+-2.578561019092466
chi2/ndof = 21.739037828375054