FROM TH2F
constant
0.04700406855190859+-0.027100527140258908
chi2/ndof = 0.00977055992556562
plane
0.006028136022703416+-0.20095689903657754
invpt slope = 0.013398458967398113+-0.023658674131011026
theta slope = 0.015814016815722157+-0.1575017782922143
chi2/ndof = 0.004832090438292906
from tgraph2D
constant
0.05419271253939307+-0.0031015991610794857
chi2/ndof = 0.0006733942148898248
plane
-0.003056137728101438+-0.015886359305939523
invpt slope = 0.014799174135629648+-0.0016720920972264901
theta slope = 0.025198272762112017+-0.012768444030760334
chi2/ndof = 0.0003152771126717838