FROM TH2F
constant
0.0182279210634819+-0.014311118118332408
chi2/ndof = 0.01080281716605379
plane
0.01363840147085335+-0.09172688424826643
invpt slope = 0.006701822023658849+-0.008505397440832466
theta slope = -0.008981851711617757+-0.09288491866623755
chi2/ndof = 0.0034134739890721603
from tgraph2D
constant
0.027716497022477853+-0.0013931274879479109
chi2/ndof = 0.00018049479038720435
plane
0.03969333098178386+-0.0052994137831180255
invpt slope = 0.00587065820110924+-0.0003966229436149102
theta slope = -0.02847441388990367+-0.0050240084241949595
chi2/ndof = 5.141396674316565e-05