importing root, please wait ... ...root imported Using root file /twist/tw00y/systematics//data/set72/anal2/goodlinks/run42210/042210.root using z positions from 2006/7 MINUIT WARNING IN HESSE ============== Negative diagonal element 3 in Error Matrix MINUIT WARNING IN HESSE ============== Negative diagonal element 4 in Error Matrix MINUIT WARNING IN HESSE ============== Negative diagonal element 5 in Error Matrix MINUIT WARNING IN HESSE ============== 5.49199e+08 added to diagonal of error matrix EIGENVALUES OF SECOND-DERIVATIVE MATRIX: -1.0514e+04 9.4816e-01 9.8044e-01 1.0160e+00 1.0715e+00 1.0797e+00 1.0516e+04 MINUIT WARNING IN HESSE ============== MATRIX FORCED POS-DEF BY ADDING 10524.987073 TO DIAGONAL. MINUIT WARNING IN HESSE ============== Negative diagonal element 2 in Error Matrix MINUIT WARNING IN HESSE ============== Negative diagonal element 3 in Error Matrix MINUIT WARNING IN HESSE ============== Negative diagonal element 4 in Error Matrix MINUIT WARNING IN HESSE ============== Negative diagonal element 5 in Error Matrix MINUIT WARNING IN HESSE ============== 1.15713e+08 added to diagonal of error matrix EIGENVALUES OF SECOND-DERIVATIVE MATRIX: -5.5297e+03 9.6329e-01 9.9030e-01 1.0016e+00 1.0089e+00 1.0371e+00 5.5317e+03 MINUIT WARNING IN HESSE ============== MATRIX FORCED POS-DEF BY ADDING 5535.263064 TO DIAGONAL. MINUIT WARNING IN HESSE ============== Negative diagonal element 2 in Error Matrix MINUIT WARNING IN HESSE ============== Negative diagonal element 3 in Error Matrix MINUIT WARNING IN HESSE ============== Negative diagonal element 4 in Error Matrix MINUIT WARNING IN HESSE ============== Negative diagonal element 5 in Error Matrix MINUIT WARNING IN HESSE ============== 1.15714e+08 added to diagonal of error matrix EIGENVALUES OF SECOND-DERIVATIVE MATRIX: -5.5286e+03 9.6419e-01 9.9058e-01 1.0015e+00 1.0087e+00 1.0362e+00 5.5306e+03 MINUIT WARNING IN HESSE ============== MATRIX FORCED POS-DEF BY ADDING 5534.132234 TO DIAGONAL. MINUIT WARNING IN HESSE ============== Negative diagonal element 2 in Error Matrix MINUIT WARNING IN HESSE ============== Negative diagonal element 3 in Error Matrix MINUIT WARNING IN HESSE ============== Negative diagonal element 4 in Error Matrix MINUIT WARNING IN HESSE ============== Negative diagonal element 5 in Error Matrix MINUIT WARNING IN HESSE ============== 1.15714e+08 added to diagonal of error matrix EIGENVALUES OF SECOND-DERIVATIVE MATRIX: -5.5284e+03 9.6419e-01 9.9059e-01 1.0015e+00 1.0087e+00 1.0362e+00 5.5304e+03 MINUIT WARNING IN HESSE ============== MATRIX FORCED POS-DEF BY ADDING 5533.936183 TO DIAGONAL. MINUIT WARNING IN HESSE ============== Negative diagonal element 2 in Error Matrix MINUIT WARNING IN HESSE ============== Negative diagonal element 3 in Error Matrix MINUIT WARNING IN HESSE ============== Negative diagonal element 4 in Error Matrix MINUIT WARNING IN HESSE ============== Negative diagonal element 5 in Error Matrix MINUIT WARNING IN HESSE ============== 1.15714e+08 added to diagonal of error matrix EIGENVALUES OF SECOND-DERIVATIVE MATRIX: -5.5284e+03 9.6419e-01 9.9059e-01 1.0015e+00 1.0087e+00 1.0362e+00 5.5304e+03 MINUIT WARNING IN HESSE ============== MATRIX FORCED POS-DEF BY ADDING 5533.940096 TO DIAGONAL. MINUIT WARNING IN HESSE ============== Negative diagonal element 2 in Error Matrix MINUIT WARNING IN HESSE ============== Negative diagonal element 3 in Error Matrix MINUIT WARNING IN HESSE ============== Negative diagonal element 4 in Error Matrix MINUIT WARNING IN HESSE ============== Negative diagonal element 5 in Error Matrix MINUIT WARNING IN HESSE ============== 1.15713e+08 added to diagonal of error matrix EIGENVALUES OF SECOND-DERIVATIVE MATRIX: -5.5284e+03 9.6422e-01 9.9062e-01 1.0016e+00 1.0088e+00 1.0361e+00 5.5304e+03 MINUIT WARNING IN HESSE ============== MATRIX FORCED POS-DEF BY ADDING 5533.886931 TO DIAGONAL. MINUIT WARNING IN HESSE ============== Negative diagonal element 2 in Error Matrix MINUIT WARNING IN HESSE ============== Negative diagonal element 3 in Error Matrix MINUIT WARNING IN HESSE ============== Negative diagonal element 4 in Error Matrix MINUIT WARNING IN HESSE ============== Negative diagonal element 5 in Error Matrix MINUIT WARNING IN HESSE ============== 1.15637e+08 added to diagonal of error matrix EIGENVALUES OF SECOND-DERIVATIVE MATRIX: -5.5219e+03 9.6363e-01 9.9109e-01 1.0018e+00 1.0086e+00 1.0375e+00 5.5239e+03 MINUIT WARNING IN HESSE ============== MATRIX FORCED POS-DEF BY ADDING 5527.469648 TO DIAGONAL. MINUIT WARNING IN MIGRAD ============== Negative diagonal element 4 in Error Matrix MINUIT WARNING IN MIGRAD ============== 1.00037 added to diagonal of error matrix MINUIT WARNING IN HESSE ============== Negative diagonal element 1 in Error Matrix MINUIT WARNING IN HESSE ============== Negative diagonal element 3 in Error Matrix MINUIT WARNING IN HESSE ============== Negative diagonal element 4 in Error Matrix MINUIT WARNING IN HESSE ============== 1.33357e+07 added to diagonal of error matrix EIGENVALUES OF SECOND-DERIVATIVE MATRIX: -4.7254e+02 1.8538e-01 9.9238e-01 1.0127e+00 1.5460e+00 4.7481e+02 MINUIT WARNING IN HESSE ============== MATRIX FORCED POS-DEF BY ADDING 473.018295 TO DIAGONAL. MINUIT WARNING IN MIGRAD ============== Negative diagonal element 2 in Error Matrix MINUIT WARNING IN MIGRAD ============== Negative diagonal element 3 in Error Matrix MINUIT WARNING IN MIGRAD ============== Negative diagonal element 4 in Error Matrix MINUIT WARNING IN MIGRAD ============== 1.00106 added to diagonal of error matrix NEW MINIMUM FOUND. GO BACK TO MINIMIZATION STEP. ================================================= V V V VVVVVVV VVVVV VVV V MINUIT WARNING IN HESSE ============== Negative diagonal element 2 in Error Matrix MINUIT WARNING IN HESSE ============== 1.06137e+07 added to diagonal of error matrix EIGENVALUES OF SECOND-DERIVATIVE MATRIX: -8.2425e+02 -3.6823e-02 8.2222e-01 9.2429e-01 1.0743e+00 2.2116e+00 8.2625e+02 MINUIT WARNING IN HESSE ============== MATRIX FORCED POS-DEF BY ADDING 825.075694 TO DIAGONAL. MINUIT WARNING IN MIGRAD ============== Negative diagonal element 2 in Error Matrix MINUIT WARNING IN MIGRAD ============== 1 added to diagonal of error matrix MINUIT WARNING IN HESSE ============== Negative diagonal element 5 in Error Matrix MINUIT WARNING IN HESSE ============== 5.65363e+07 added to diagonal of error matrix EIGENVALUES OF SECOND-DERIVATIVE MATRIX: -6.1862e+03 8.4224e-01 9.6624e-01 9.9767e-01 1.0047e+00 1.1764e+00 6.1882e+03 MINUIT WARNING IN HESSE ============== MATRIX FORCED POS-DEF BY ADDING 6192.391882 TO DIAGONAL. MINUIT WARNING IN HESSE ============== Negative diagonal element 5 in Error Matrix MINUIT WARNING IN HESSE ============== 5.65364e+07 added to diagonal of error matrix EIGENVALUES OF SECOND-DERIVATIVE MATRIX: -6.1815e+03 8.4256e-01 9.6634e-01 9.9759e-01 1.0046e+00 1.1761e+00 6.1835e+03 MINUIT WARNING IN HESSE ============== MATRIX FORCED POS-DEF BY ADDING 6187.703676 TO DIAGONAL. MINUIT WARNING IN MIGRAD ============== VARIABLE4 IS AT ITS LOWER ALLOWED LIMIT. MINUIT WARNING IN MIGRAD ============== VARIABLE4 IS AT ITS LOWER ALLOWED LIMIT. MINUIT WARNING IN MIGRAD ============== VARIABLE4 IS AT ITS LOWER ALLOWED LIMIT. MINUIT WARNING IN MIGRAD ============== VARIABLE4 IS AT ITS LOWER ALLOWED LIMIT. MINUIT WARNING IN MIGRAD ============== VARIABLE4 IS AT ITS LOWER ALLOWED LIMIT. MINUIT WARNING IN MIGRAD ============== VARIABLE4 IS AT ITS LOWER ALLOWED LIMIT. MINUIT WARNING IN MIGRAD ============== VARIABLE4 IS AT ITS LOWER ALLOWED LIMIT. MINUIT WARNING IN HESSE ============== Negative diagonal element 2 in Error Matrix MINUIT WARNING IN HESSE ============== Negative diagonal element 3 in Error Matrix MINUIT WARNING IN HESSE ============== Negative diagonal element 4 in Error Matrix MINUIT WARNING IN HESSE ============== Negative diagonal element 5 in Error Matrix MINUIT WARNING IN HESSE ============== 1.15713e+08 added to diagonal of error matrix EIGENVALUES OF SECOND-DERIVATIVE MATRIX: -5.5297e+03 9.6329e-01 9.9030e-01 1.0016e+00 1.0089e+00 1.0371e+00 5.5317e+03 MINUIT WARNING IN HESSE ============== MATRIX FORCED POS-DEF BY ADDING 5535.263064 TO DIAGONAL. MINUIT WARNING IN HESSE ============== Negative diagonal element 2 in Error Matrix MINUIT WARNING IN HESSE ============== Negative diagonal element 3 in Error Matrix MINUIT WARNING IN HESSE ============== Negative diagonal element 4 in Error Matrix MINUIT WARNING IN HESSE ============== Negative diagonal element 5 in Error Matrix MINUIT WARNING IN HESSE ============== 1.15714e+08 added to diagonal of error matrix EIGENVALUES OF SECOND-DERIVATIVE MATRIX: -5.5286e+03 9.6419e-01 9.9058e-01 1.0015e+00 1.0087e+00 1.0362e+00 5.5306e+03 MINUIT WARNING IN HESSE ============== MATRIX FORCED POS-DEF BY ADDING 5534.132234 TO DIAGONAL. MINUIT WARNING IN HESSE ============== Negative diagonal element 2 in Error Matrix MINUIT WARNING IN HESSE ============== Negative diagonal element 3 in Error Matrix MINUIT WARNING IN HESSE ============== Negative diagonal element 4 in Error Matrix MINUIT WARNING IN HESSE ============== Negative diagonal element 5 in Error Matrix MINUIT WARNING IN HESSE ============== 1.15714e+08 added to diagonal of error matrix EIGENVALUES OF SECOND-DERIVATIVE MATRIX: -5.5284e+03 9.6419e-01 9.9059e-01 1.0015e+00 1.0087e+00 1.0362e+00 5.5304e+03 MINUIT WARNING IN HESSE ============== MATRIX FORCED POS-DEF BY ADDING 5533.936183 TO DIAGONAL. MINUIT WARNING IN MIGRAD ============== VARIABLE1 IS AT ITS LOWER ALLOWED LIMIT. MINUIT WARNING IN MIGRAD ============== VARIABLE1 IS AT ITS LOWER ALLOWED LIMIT. MINUIT WARNING IN MIGRAD ============== VARIABLE1 IS AT ITS LOWER ALLOWED LIMIT. MINUIT WARNING IN MIGRAD ============== VARIABLE1 IS AT ITS LOWER ALLOWED LIMIT. MINUIT WARNING IN MIGRAD ============== VARIABLE1 IS AT ITS LOWER ALLOWED LIMIT. MINUIT WARNING IN MIGRAD ============== VARIABLE1 IS AT ITS LOWER ALLOWED LIMIT. MINUIT WARNING IN MIGRAD ============== VARIABLE1 IS AT ITS LOWER ALLOWED LIMIT. MINUIT WARNING IN HESSE ============== Negative diagonal element 2 in Error Matrix MINUIT WARNING IN HESSE ============== Negative diagonal element 3 in Error Matrix MINUIT WARNING IN HESSE ============== Negative diagonal element 5 in Error Matrix MINUIT WARNING IN HESSE ============== 1.13741e+08 added to diagonal of error matrix EIGENVALUES OF SECOND-DERIVATIVE MATRIX: -2.6902e+03 9.7990e-01 9.9296e-01 9.9994e-01 1.0028e+00 1.0420e+00 2.6922e+03 MINUIT WARNING IN HESSE ============== MATRIX FORCED POS-DEF BY ADDING 2692.935904 TO DIAGONAL. MINUIT WARNING IN HESSE ============== Negative diagonal element 2 in Error Matrix MINUIT WARNING IN HESSE ============== Negative diagonal element 3 in Error Matrix MINUIT WARNING IN HESSE ============== Negative diagonal element 5 in Error Matrix MINUIT WARNING IN HESSE ============== 1.13738e+08 added to diagonal of error matrix EIGENVALUES OF SECOND-DERIVATIVE MATRIX: -2.5487e+03 9.7990e-01 9.9250e-01 9.9988e-01 1.0013e+00 1.0391e+00 2.5507e+03 MINUIT WARNING IN HESSE ============== MATRIX FORCED POS-DEF BY ADDING 2551.294789 TO DIAGONAL. MINUIT WARNING IN HESSE ============== Negative diagonal element 2 in Error Matrix MINUIT WARNING IN HESSE ============== Negative diagonal element 3 in Error Matrix MINUIT WARNING IN HESSE ============== Negative diagonal element 5 in Error Matrix MINUIT WARNING IN HESSE ============== 1.13643e+08 added to diagonal of error matrix EIGENVALUES OF SECOND-DERIVATIVE MATRIX: -2.5462e+03 9.7989e-01 9.9242e-01 9.9987e-01 1.0012e+00 1.0390e+00 2.5482e+03 MINUIT WARNING IN HESSE ============== MATRIX FORCED POS-DEF BY ADDING 2548.789030 TO DIAGONAL. MINUIT WARNING IN MIGRAD ============== VARIABLE4 IS AT ITS LOWER ALLOWED LIMIT. MINUIT WARNING IN MIGRAD ============== VARIABLE4 IS AT ITS LOWER ALLOWED LIMIT. MINUIT WARNING IN MIGRAD ============== VARIABLE4 IS AT ITS LOWER ALLOWED LIMIT. MINUIT WARNING IN MIGRAD ============== VARIABLE4 IS AT ITS LOWER ALLOWED LIMIT. MINUIT WARNING IN MIGRAD ============== VARIABLE4 IS AT ITS LOWER ALLOWED LIMIT. MINUIT WARNING IN MIGRAD ============== VARIABLE4 IS AT ITS LOWER ALLOWED LIMIT. MINUIT WARNING IN MIGRAD ============== VARIABLE4 IS AT ITS LOWER ALLOWED LIMIT. MINUIT WARNING IN HESSE ============== Negative diagonal element 2 in Error Matrix MINUIT WARNING IN HESSE ============== Negative diagonal element 3 in Error Matrix MINUIT WARNING IN HESSE ============== Negative diagonal element 5 in Error Matrix MINUIT WARNING IN HESSE ============== 2.75265e+09 added to diagonal of error matrix EIGENVALUES OF SECOND-DERIVATIVE MATRIX: -2.7780e+04 9.7353e-01 9.9501e-01 1.0000e+00 1.0090e+00 1.0522e+00 2.7782e+04 MINUIT WARNING IN HESSE ============== MATRIX FORCED POS-DEF BY ADDING 27807.480860 TO DIAGONAL. EIGENVALUES OF SECOND-DERIVATIVE MATRIX: -1.3977e-02 2.3624e-01 7.5066e-01 9.2457e-01 9.9925e-01 1.2476e+00 2.8557e+00 MINUIT WARNING IN HESSE ============== MATRIX FORCED POS-DEF BY ADDING 0.016832 TO DIAGONAL. MINUIT WARNING IN MIGRAD ============== VARIABLE1 IS AT ITS LOWER ALLOWED LIMIT. MINUIT WARNING IN MIGRAD ============== VARIABLE1 IS AT ITS LOWER ALLOWED LIMIT. MINUIT WARNING IN MIGRAD ============== VARIABLE1 IS AT ITS LOWER ALLOWED LIMIT. MINUIT WARNING IN MIGRAD ============== VARIABLE1 IS AT ITS LOWER ALLOWED LIMIT. MINUIT WARNING IN MIGRAD ============== VARIABLE1 IS AT ITS LOWER ALLOWED LIMIT. MINUIT WARNING IN MIGRAD ============== VARIABLE1 IS AT ITS LOWER ALLOWED LIMIT. MINUIT WARNING IN MIGRAD ============== VARIABLE1 IS AT ITS LOWER ALLOWED LIMIT. MINUIT WARNING IN PARAMETR ============== VARIABLE2 BROUGHT BACK INSIDE LIMITS. MINUIT WARNING IN HESSE ============== Negative diagonal element 2 in Error Matrix MINUIT WARNING IN HESSE ============== Negative diagonal element 5 in Error Matrix MINUIT WARNING IN HESSE ============== 2.38068e+09 added to diagonal of error matrix EIGENVALUES OF SECOND-DERIVATIVE MATRIX: -2.7856e+04 9.6314e-01 9.9982e-01 9.9997e-01 1.0008e+00 1.0532e+00 2.7858e+04 MINUIT WARNING IN HESSE ============== MATRIX FORCED POS-DEF BY ADDING 27883.758877 TO DIAGONAL. MINUIT WARNING IN MIGRAD ============== Negative diagonal element 5 in Error Matrix MINUIT WARNING IN MIGRAD ============== Negative diagonal element 6 in Error Matrix MINUIT WARNING IN MIGRAD ============== 1.00018 added to diagonal of error matrix MINUIT WARNING IN HESSE ============== Negative diagonal element 2 in Error Matrix MINUIT WARNING IN HESSE ============== Negative diagonal element 4 in Error Matrix MINUIT WARNING IN HESSE ============== 6.23657e+07 added to diagonal of error matrix EIGENVALUES OF SECOND-DERIVATIVE MATRIX: -4.9054e+01 1.4525e-02 5.8815e-01 9.4817e-01 1.0049e+00 2.4007e+00 5.1097e+01 MINUIT WARNING IN HESSE ============== MATRIX FORCED POS-DEF BY ADDING 49.104707 TO DIAGONAL. MINUIT WARNING IN MIGRAD ============== Negative diagonal element 2 in Error Matrix MINUIT WARNING IN MIGRAD ============== 1 added to diagonal of error matrix MINUIT WARNING IN HESSE ============== Negative diagonal element 2 in Error Matrix MINUIT WARNING IN HESSE ============== Negative diagonal element 4 in Error Matrix MINUIT WARNING IN HESSE ============== 5.05468e+07 added to diagonal of error matrix EIGENVALUES OF SECOND-DERIVATIVE MATRIX: -1.5050e+03 -1.7631e-02 5.8944e-01 9.4595e-01 1.0053e+00 2.4283e+00 1.5071e+03 MINUIT WARNING IN HESSE ============== MATRIX FORCED POS-DEF BY ADDING 1506.550240 TO DIAGONAL. MINUIT WARNING IN HESSE ============== Negative diagonal element 2 in Error Matrix MINUIT WARNING IN HESSE ============== Negative diagonal element 4 in Error Matrix MINUIT WARNING IN HESSE ============== 5.05468e+07 added to diagonal of error matrix EIGENVALUES OF SECOND-DERIVATIVE MATRIX: -1.5022e+03 -1.9713e-02 5.8893e-01 9.4438e-01 1.0049e+00 2.4293e+00 1.5043e+03 MINUIT WARNING IN HESSE ============== MATRIX FORCED POS-DEF BY ADDING 1503.735150 TO DIAGONAL. MINUIT WARNING IN MIGRAD ============== VARIABLE1 IS AT ITS LOWER ALLOWED LIMIT. MINUIT WARNING IN MIGRAD ============== VARIABLE1 IS AT ITS LOWER ALLOWED LIMIT. NEW MINIMUM FOUND. GO BACK TO MINIMIZATION STEP. ================================================= V V V VVVVVVV VVVVV VVV V all fit results: {'A': [0.051894656221333491, 0.00066549564952611551], 'Dx': [0.20711843300657051, 0.00048683820039663317], 'chisquare': 2405.4068944814135, 'L': [47.013472736712693, 1.1029732172279978], 'A_d': [0.0017577925093527624, 2.994091770130991e-05], 'L_d': [0.45321852302787019, 0.021607198373648467], 'Dy': [-0.014947513521738287, 0.00041106992876649429], 'phase': [66.600470547773909, 0.023210952278702734]} {'A': [0.10012577482287469, 9.6749863749689968e-06], 'Dx': [0.22527100285865487, 0.00044567257816119366], 'chisquare': 7246.0228742780109, 'L': [62.424905111161323, 0.80919165577209284], 'A_d': [0.0032982948280353419, 1.4732754038127016e-05], 'L_d': [0.73877986641482485, 0.015983299970769471], 'Dy': [-0.022489392273353559, 0.00046975309020602651], 'phase': [92.021357593886279, 0.013958265621980104]} {'A': [0.047657791018646534, 0.00068384620028894005], 'Dx': [0.20506719358482783, 0.00048073063780762482], 'chisquare': 3390.9104280440552, 'L': [43.418691506237437, 0.45513360366808087], 'A_d': [0.0014618220165499296, 2.4854214385527928e-05], 'L_d': [7.8212547549583178e-11, 0.00049986302896282142], 'Dy': [-0.01588121812376464, 0.00047440475771765023], 'phase': [79.230074544169554, 0.020090177127912057]} {'A': [7.5495165674510645e-14, 4.9129215182186492e-06], 'Dx': [0.19429982102234788, 0.00037920526103629726], 'chisquare': 5795.3847915675433, 'L': [27.48700716929018, 0.40282465034342252], 'A_d': [0.00083816447410339778, 1.5145213381501099e-05], 'L_d': [0.1814734408795276, 0.0071940632948315486], 'Dy': [-0.014640997015145985, 0.00037497563822430635], 'phase': [68.971180668018405, 0.058762003034289023]} {'A': [0.047657494320000882, 0.00068387946653411524], 'Dx': [0.20506711718397419, 0.00048075339366349112], 'chisquare': 3390.9104320703364, 'L': [43.418837456307614, 0.4552213024236913], 'A_d': [0.0014618331797948136, 2.4854597987178373e-05], 'L_d': [1.1772869346060588e-09, 0.0004998933291838481], 'Dy': [-0.015881234631443419, 0.00047447333670014302], 'phase': [-96.699104648441732, 0.020094584953000094]} {'A': [1.7319479184152442e-13, 4.9130319262902233e-06], 'Dx': [0.19429990758729154, 0.00037975647143007052], 'chisquare': 5795.3847907034915, 'L': [27.487018098461803, 0.43305380568093454], 'A_d': [0.00083817780381933993, 1.5156820231315704e-05], 'L_d': [0.18147372812150198, 0.0077384774125297817], 'Dy': [-0.014640820224212092, 0.00037483556420969677], 'phase': [56.40480468790031, 0.062095562231903045]} {'A': [4.7683700662992656e-06, 1.3680391440229478e-05], 'Dx': [0.19597794584283434, 0.00037568582283498131], 'chisquare': 6521.739341110776, 'L': [17.272403081724963, 0.062424130779193732], 'A_d': [0.00072556488301134259, 1.5017121016758228e-05], 'L_d': [0.0016335228914394762, 1.3421012523717746e-05], 'Dy': [-0.013916229602745744, 0.0003754061457907909], 'phase': [29.553967546317722, 0.0433550998615857]} final fit results: chi = 2405.40689448 A = 0.051895 +/- 0.000665 A_d = 0.001758 +/- 0.000030 L = 47.013473 +/- 1.102973 L_d = 0.453219 +/- 0.021607 phase = 66.600471 +/- 0.023211 Dx = 0.207118 +/- 0.000487 Dy = -0.014948 +/- 0.000411