t = 4.955072e-001 fitdelta = 4.9e-004
 Iter 23: fit = 4.960583e-001 fitdelta = 5.5e-004
 Iter 24: fit = 4.966814e-001 fitdelta = 6.2e-004
 Iter 25: fit = 4.973882e-001 fitdelta = 7.1e-004
 Iter 26: fit = 4.981921e-001 fitdelta = 8.0e-004
 Iter 27: fit = 4.991075e-001 fitdelta = 9.2e-004
 Iter 28: fit = 5.001490e-001 fitdelta = 1.0e-003
 Iter 29: fit = 5.013282e-001 fitdelta = 1.2e-003
 Iter 30: fit = 5.026502e-001 fitdelta = 1.3e-003
 Iter 31: fit = 5.041052e-001 fitdelta = 1.5e-003
 Iter 32: fit = 5.056587