VALD3 line lists contain a mandatory accuracy parameter for the oscillator strengths. This field is returned at beginning (2nd field) of the reference line of the long format extraction. Here are a few examples:

'Fe 1',       5166.2816,  -4.195,  0.0000,  4.0,  2.3992,  5.0, 1.600, 1.500, 1.310, 3.160,-6.280, 204.253, ...
'  LS                                                                           3d6.4s2 a5D'
'  LS                                                             3d6.(5D).4s.4p.(3P*) z7D*'
'FMW    N B+       Kurucz Fe I 2014Fe               7 K14      11 FMW       7 K14       7 K14       7 K14 ...
'Mg 1',       5167.3216,  -0.931,  2.7091,  0.0,  5.1079,  1.0,99.000,99.000,99.000, 7.990,-5.470, 729.23, ...
'  LS                                                          3s.3p                    3P*'
'  LS                                                              3s.4s                 3S'
'ATJL   E 0.037     CNO, Na 1, Mg 1:Mg              17 NIST10   18 ATJL     17 NIST10   17 NIST10   19 KP ...
'Fe 1',       5167.4879,  -1.118,  1.4849,  4.0,  3.8835,  3.0, 1.320, 1.250, 1.420, 6.750,-6.150, 281.253, ...
'  LS                                                                       3d7.(4F).4s a3F'
'  LS                                                             3d6.(5D).4s.4p.(3P*) z3D*'
'BWL    E 0.021    Kurucz Fe I 2014Fe               7 K14      11 BWL       7 K14       7 K14       7 K14 ...
'Fe 1',       5167.7176,  -2.814,  3.4149,  1.0,  5.8135,  2.0, 0.820, 1.260, 1.480, 8.020,-6.060,  -7.770, ...
'  LS                                                                       3d7.(2P).4s a1P'
'  LS                                                                            (4P)4p 3D*'
'K14               Kurucz Fe I 2014Fe               7 K14       7 K14       7 K14       7 K14       7 K14 ...
'Nd 2',       5167.9200,  -1.180,  0.5595,  6.5,  2.9580,  5.5, 1.110, 1.010, 1.380, 0.000, 0.000,   0.000, ...
'  LS                                                  4f4.(5I).6s                       4I'
'                                                                                         *'
'HLSC   E 0.04     Wisconsin REE exNd+             12 HLSC     12 HLSC     12 HLSC     12 HLSC     12 HLSC ...

The accuracy filed consists of accuracy flag and optional parameter. Accuracy flag values are:

' ' or '_' ... no value

'N' ... quality class (NIST)

'E' ... absolute error in dex

'C' ... cancellation factor

'P' ... predicted line

ValdWiki: VALD3_accuracy (last edited 2018-12-13 11:13:44 by NikolaiPiskunov)