FROM TH2F
constant
10.760418781294764+-0.42705969036131397
chi2/ndof = 14.533431798831614
plane
20.83583121254731+-3.866299400853726
invpt slope = -0.08697412586637063+-0.19572366244959544
theta slope = -8.63613020881649+-3.37684861309132
chi2/ndof = 14.928690370699012
from tgraph2D
constant
23.732109522262547+-4.633380254128011
chi2/ndof = 1373.965604168316
plane
-51.66090366310094+-36.52516807827872
invpt slope = 6.078973078826228+-2.077850260504642
theta slope = 52.69451589599147+-32.84243133338329
chi2/ndof = 1157.9176768217485