FROM TH2F
constant
0.01531800571747965+-0.012903490306332793
chi2/ndof = 0.00763732083886411
plane
0.021934521585018598+-0.15414489467145684
invpt slope = 0.004066333826623315+-0.005091234830706831
theta slope = -0.015098625070542403+-0.12655130775290457
chi2/ndof = 0.0006412513784583054
from tgraph2D
constant
0.022236788897135363+-0.0012207987287372968
chi2/ndof = 0.0001415832059307153
plane
0.03498840401095271+-0.004562957373607747
invpt slope = 0.004002166354107967+-0.0001362920965378802
theta slope = -0.02500184369216161+-0.003707837712012586
chi2/ndof = 1.3614226020309076e-05