FROM TH2F
constant
0.03882864497583268+-0.016896885575951762
chi2/ndof = 0.016053294522473213
plane
0.06352775381988417+-0.08436017184086249
invpt slope = 0.011158558186871458+-0.009382232350742566
theta slope = -0.04304798761582574+-0.07525211163012951
chi2/ndof = 0.004947513178915009
from tgraph2D
constant
0.05244846269436198+-0.0023882046072932943
chi2/ndof = 0.0008213070595217447
plane
0.0773707525542715+-0.006364948194607349
invpt slope = 0.011461033889484806+-0.0007172305419217749
theta slope = -0.052255898772686694+-0.005840188351377762
chi2/ndof = 0.00027884814789623714