Abstract
The first astronomical measurements of the Jk = 182-181, 192-191, and 202-201 E transitions of methanol (CH3OH) are presented. A rotational temperature Trot = 170(13) K was determined for the Sgr B2N-LMH core by combining the data from the Jk = 132-131 and 172-171 E transitions. The total column density of CH3OH is NT(CH3OH) = 4.2(6) × 1017 cm-2, and the fractional abundance of CH3OH is X(CH3OH) ≈ 4 × 10-8. The H59α recombination line and a new unidentified line were detected.
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