FROM TH2F
constant
31.476997130359035+-0.7125261414164216
chi2/ndof = 15.442972579841964
plane
58.9467042438593+-4.38728179891725
invpt slope = -10.344402154086758+-0.5800741631557118
theta slope = -1.1430335531593485+-4.085920050953905
chi2/ndof = 9.212041554516306
from tgraph2D
constant
46.085610417219975+-1.997602696360686
chi2/ndof = 271.34832433932615
plane
29.380420613669315+-11.822448217241648
invpt slope = 0.13129833322144535+-1.7021632921081509
theta slope = 14.629976242888318+-10.53871368424327
chi2/ndof = 271.12482402277783