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Table A.1.

Assigned transitions for NCN, observed transition frequency (MHz), experimental uncertainty Unc. (MHz), residual O−C between observed frequency and that calculated from the final set of spectroscopic parameters, weight for blended lines, and source of line.

J J Frequency Unc. O−C Weight
1 0 1 0 0 0 0 0 19458.1 0.1 −0.15777 Tyler et al. (1972)
2 0 2 0 1 0 1 0 38916.282 0.100 0.00717 Brown et al. (1985)
7 0 7 0 6 0 6 0 136194.32870 0.05000 0.00263 Kraśnicki et al. (2011)
8 0 8 0 7 0 7 0 155645.83281 0.05000 −0.01287 Kraśnicki et al. (2011)
9 0 9 0 8 0 8 0 175095.43308 0.05000 −0.00786 Kraśnicki et al. (2011)
21 6 15 1 20 6 14 1 407549.715 0.050 0.05275 0.5000 Koeln
21 6 16 1 20 6 15 1 407549.715 0.050 0.05275 0.5000 Koeln
25 6 19 1 24 6 18 1 485115.812 0.050 0.04584 0.5000 Koeln
25 6 20 1 24 6 19 1 485115.812 0.050 0.04584 0.5000 Koeln
26 6 20 1 25 6 19 1 504502.373 0.030 −0.03347 0.5000 Koeln
26 6 21 1 25 6 20 1 504502.373 0.030 −0.03347 0.5000 Koeln

Notes. This table and those of other isotopologs are available in their entirety at the CDS. A portion is shown here for guidance regarding its form and content. The quantum number designators vt = 0 and 1 indicate the tunneling states 0+ and 0, respectively.

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