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The cis isomer of HOSO+ is much lower in
energy than the trans isomer. Moreover, the
available experimental transition frequencies are
limited to low J. Therefore, an entry
has not yet been created for the trans isomer.
The experimental data was taken from
(1) V. Lattanzi, P. Thaddeus, M. C. McCarthy, and S. Thorwirth,
2010, J. Chem. Phys. 133, Art. No. 194305;
and from
(2) V. Lattanzi, C. A. Gottlieb, P. Thaddeus, S. Thorwirth,
and M. C. McCarthy,
2011, Astron. Astrophys. 533, Art. No. L11.
The parameters released and the uncertainties used in
the final fit differ slightly from those given in (1) and (2).
Since the experimental data are restricted to
Ka = 0 and 1, predictions with
Ka ≥ 2 should be viewed with
increasing caution, in particular b-type transitions.
Moreover, predictions for transitions with
Ka ≤ 1 should be
reliable as long as the uncertainties do not exceed
200 kHz.
The dipole moment is from an ab initio calculation
in (1).
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