FROM TH2F
constant
0.019582459480544327+-0.021096347962061075
chi2/ndof = 0.005624073980176613
plane
-0.034429767486046425+-0.14809573066802487
invpt slope = 0.0029356427039048663+-0.023437663713893053
theta slope = 0.045993755853858065+-0.1345373751248668
chi2/ndof = 0.0024708983667859914
from tgraph2D
constant
0.024350706861586233+-0.00123645674636388
chi2/ndof = 7.491243899585452e-05
plane
-0.02069974252931961+-0.007100966261696739
invpt slope = 0.004130498777059122+-0.0008281153697244797
theta slope = 0.034202221371191645+-0.006005236018721062
chi2/ndof = 3.608866939254702e-05