FROM TH2F
constant
0.020375822274587486+-0.01942498500547691
chi2/ndof = 0.02901334662539986
plane
0.005012809479617306+-0.042051362246678936
invpt slope = 0.03414199198440844+-0.03275901524528076
theta slope = -0.011409877104892172+-0.06849019128247157
chi2/ndof = 0.008852121930903513
from tgraph2D
constant
0.03994322847956208+-0.004800672889774572
chi2/ndof = 0.001567159293284456
plane
0.006688335350635242+-0.004788445805242391
invpt slope = 0.038876072099555195+-0.002976630366270533
theta slope = -0.00813366599295059+-0.008670167215570457
chi2/ndof = 0.00042211387152998826