Experimentally determined energies of rovibrational levels
of the 4{singlet}{Sigma}+{ungerade} state in Na2.
Zero of energy corresponds to the bottom of the ground
state potential. 
Asterisks denote levels excluded from the fit of the potential
energy curve.

  v       J      E(cm-1)            v       J      E(cm-1)

  0      12     33243.31            2      42     33614.09
  1      12     33344.81            3      42     33701.39
  2      12     33441.85            4      42     33781.18
  3      12     33533.43            5      42     33853.41
  6      12     33767.83            6      42     33919.76
  7      12     33834.93            7      42     33983.12
  8      12     33899.66            8      42     34045.00
  9      12     33963.10            9      42     34106.01
 10      12     34025.57           10      42     34166.34
 11      12     34087.32           11      42     34226.16
 18      12     34502.54           12      42     34285.42
 19      12     34559.58           13      42     34344.04
 21      12     34671.68           15      42     34459.92
 22      12     34726.67           16      42     34517.04
 23      12     34780.82           17      42     34573.66
  0      14     33249.18           18      42     34629.73
  1      14     33350.61           19      42     34684.98*
  2      14     33447.52           24      42     34951.74
  3      14     33539.00           25      42     35002.47
  6      14     33772.85           26      42     35051.91
  7      14     33839.84           27      42     35100.23
  8      14     33904.51           28      42     35147.08
  9      14     33967.82           29      42     35192.47
 10      14     34030.25           30      42     35236.15
 11      14     34091.85           31      42     35277.98
 16      14     34391.09           32      42     35317.56
 17      14     34449.23           37      42     35389.28
 18      14     34506.73           41      42     35420.39
 19      14     34563.69           45      42     35447.26*
 21      14     34675.68           49      42     35470.03
 22      14     34730.64           51      42     35482.07
 23      14     34784.79           52      42     35486.35
  1      16     33357.16           53      42     35491.96
  2      16     33453.96           54      42     35498.20
  3      16     33545.32           55      42     35504.68
  4      16     33629.99           56      42     35511.43
  5      16     33707.50           57      42     35518.60
  1      18     33364.64           58      42     35525.99
  2      18     33461.36           60      42     35541.62
  3      18     33552.48           61      42     35549.69
  4      18     33637.04           62      42     35558.01
  5      18     33714.28           63      42     35566.46
  7      18     33851.79           64      42     35575.18
  0      24     33291.55           65      42     35584.11
  1      24     33392.26           66      42     35593.15
  2      24     33488.43           67      42     35602.44
  4      24     33662.73           68      42     35611.80
  5      24     33739.20           70      42     35631.38*
  6      24     33809.13           71      42     35641.11
  0      26     33302.62           72      42     35651.17
  1      26     33403.12           73      42     35661.44
  2      26     33499.13           74      42     35671.67
  4      26     33672.87           75      42     35682.10
  5      26     33748.87           76      42     35692.71
  2      27     33504.86           77      42     35703.40
  3      27     33594.97            0      43     33431.15
  4      27     33678.21            3      43     33710.06
  5      27     33754.06            0      44     33440.55
  6      27     33823.66            1      44     33538.86
  7      27     33889.33            2      44     33632.07
  8      27     33952.96            3      44     33718.90
  9      27     34015.47            4      44     33798.10
 10      27     34077.22            5      44     33869.64
 11      27     34138.16            6      44     33935.51
 12      27     34198.58            7      44     33998.50
 13      27     34258.38            8      44     34060.12
 14      27     34317.61            9      44     34120.89
 15      27     34376.49           10      44     34181.03
 16      27     34434.52           11      44     34240.63
 17      27     34492.16           12      44     34299.82
 18      27     34549.13           13      44     34358.13
 19      27     34605.62           14      44     34416.15
 20      27     34661.39           15      44     34473.63
 21      27     34716.58           16      44     34530.65
 23      27     34824.60           18      44     34643.03
 24      27     34877.43           19      44     34698.25
 25      27     34929.19           20      44     34752.98
  0      28     33314.53           23      44     34912.57
  1      28     33414.96           24      44     34964.00
  2      28     33510.67           25      44     35014.46
  4      28     33683.78           26      44     35063.74
  5      28     33759.39           27      44     35111.84
  6      28     33828.78           28      44     35158.44
  7      28     33894.34           29      44     35203.62
 11      28     34142.88           30      44     35246.90
  0      29     33320.81           31      44     35288.52
  1      29     33421.12           32      44     35327.70
  2      29     33516.78           34      44     35364.46
  3      29     33606.59           38      44     35398.50
  4      29     33689.48           42      44     35429.05
  5      29     33764.91           46      44     35455.68
  6      29     33834.23           49      44     35476.72
  7      29     33899.56           51      44     35485.33
  8      29     33963.06           52      44     35490.31
  9      29     34025.38           53      44     35495.64
 10      29     34086.93           54      44     35501.81
 11      29     34147.80           55      44     35508.37
 12      29     34208.06           56      44     35515.15
 13      29     34267.76           57      44     35522.37
 14      29     34326.89           58      44     35529.78
 15      29     34385.44           59      44     35537.41
 16      29     34443.57           60      44     35545.34
 17      29     34501.08           61      44     35553.37
 18      29     34557.96           62      44     35561.83
 19      29     34614.31           63      44     35570.36
 20      29     34670.02           64      44     35579.08
 21      29     34725.09           65      44     35588.00
 23      29     34832.92           66      44     35597.10
 24      29     34885.95           67      44     35606.39*
 25      29     34937.17           68      44     35615.77
  0      30     33327.32           69      44     35625.39
  1      30     33427.54           70      44     35635.13
  4      30     33695.40           71      44     35644.94*
  5      30     33770.63           72      44     35655.17
  6      30     33839.65           73      44     35665.32
 11      30     34152.79           74      44     35675.60
  0      31     33334.04           75      44     35686.15
  1      31     33434.12           76      44     35696.79
  2      31     33529.47           77      44     35707.51
  4      31     33701.50            0      46     33460.05
  5      31     33776.51            1      46     33558.01
  6      31     33845.33            2      46     33650.83
  7      31     33910.49            3      46     33737.14
  0      37     33378.86            4      46     33815.66
  1      37     33478.20            5      46     33886.57
  2      37     33572.67           13      46     34372.84
  3      37     33661.08           15      46     34488.00
  4      37     33742.17            0      48     33480.36
  6      37     33883.37            1      48     33578.03
  7      37     33947.57            2      48     33670.37
  8      37     34010.14            4      48     33834.00
  9      37     34071.67            5      48     33904.14
 14      37     34370.18            6      48     33969.05
 15      37     34428.26           11      48     34271.41
 16      37     34485.74           12      48     34329.98
 20      37     34710.14           13      48     34388.17
 21      37     34764.77           15      48     34502.94
 22      37     34818.58           16      48     34559.57
 23      37     34871.51            0      54     33546.15
 28      37     35120.93            1      54     33642.65
  0      39     33395.42            3      54     33817.42
  1      39     33494.50            4      54     33893.06
  2      39     33588.65            5      54     33961.08
  3      39     33676.68            6      54     34024.29
  4      39     33757.29            9      54     34204.95
  6      39     33897.41           10      54     34263.86
  7      39     33961.33           11      54     34322.29
  8      39     34023.61           12      54     34380.27
  9      39     34084.94           18      54     34718.12*
 10      39     34145.54           20      54     34826.01
 14      39     34382.47            2      55     33744.91
 15      39     34440.45            3      55     33828.35
 16      39     34497.84            0      56     33569.70
 17      39     34554.67            1      56     33665.82
 22      39     34829.76            3      56     33839.30
 23      39     34882.59            4      56     33914.12
 27      39     35083.74            5      56     33981.35
  0      40     33403.95            6      56     34043.99
  6      40     33904.68            9      56     34223.66
  7      40     33968.38           10      56     34282.24
  8      40     34030.55           11      56     34340.51
  0      41     33412.82           12      56     34398.21
  3      41     33692.99           19      56     34788.71
  4      41     33773.03           20      56     34842.30
  0      42     33421.84            2      57     33767.81
  1      42     33520.52            3      57     33850.81*