FROM TH2F
constant
0.010007323069045043+-0.015081086189511542
chi2/ndof = 0.002568941935407863
plane
0.009682953657073633+-0.17694960120630004
invpt slope = 0.002842449832890264+-0.011282336391448313
theta slope = -0.0036899622746022105+-0.14691886695455672
chi2/ndof = 0.0011165992809043092
from tgraph2D
constant
0.012199525885127148+-0.0007305966950219313
chi2/ndof = 2.5087261946555594e-05
plane
0.025259168780088933+-0.006615115464999752
invpt slope = 0.002313870722966749+-0.00038981487411864275
theta slope = -0.014495857049057818+-0.005381347228696444
chi2/ndof = 1.3807851455074166e-05