FROM TH2F
constant
0.023479959839984656+-0.02393077405885483
chi2/ndof = 0.0067421439302368606
plane
0.06169890555871151+-0.1845399471525999
invpt slope = 0.006112036126406983+-0.030273401589144627
theta slope = -0.040295725962782504+-0.1444145636106287
chi2/ndof = 0.0031566650253108293
from tgraph2D
constant
0.028688014375277963+-0.002344984173914212
chi2/ndof = 0.00024195383413974335
plane
0.08937024276736097+-0.007533452172715569
invpt slope = 0.00468342672775412+-0.0013812352858435652
theta slope = -0.060565124381170635+-0.006082478283956008
chi2/ndof = 6.322073815246025e-05