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Table 2

Characterization of the different datasets used in the analysis of 12CH3O13CH3.

Source Frequency Number of Typ. exp. J max K a,max σ wrms
[GHz] transitions (lines) uncert. [kHz]

Niide & Hayashi (2003) 8–34 36 (36) 50 7 2 1.13

Synthesizer 34–68 125 (89) 10 17 5 0.72
Tripler 75–120 389 (242) 20 31 8 0.83
Superlattice 3rd harm. 300–360 807 (439) 30 53 12 0.96
Superlattice 5th harm. 500–600 786 (289) 80 60 10 0.95
Superlattice 7th harm. 700–840 1236 (352) 110 53 14 1.01
Multiplier chain 1330–1500 1155 (123) 540 53 25 1.03

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