Table 1
Line parameters.
| Line | Observation | Rest freq. | Sky freq. | E low a | S ul b | α c |
| date | (GHz) | (GHz) | (K) | (1012 cm-2 km-1 s) | ||
|
|
||||||
| SH+NJ = 12–01F = 1.5–0.5 | 2014 May 05, Jul. 18 | 526.038793(50) | 278.944 | 0.0 | 1.14 | |
| F = 2.5–1.5 | – | 526.048023(50) | 278.949 | 0.0 | 2.06 | 30.1 |
| F = 1.5–1.5 | – | 526.124951(50) | 278.990 | 0.0 | 0.23 | |
| 34SH+NJ = 12–01 | – | See dedicated entries in Table 2 | ||||
|
|
||||||
| CH+J = 1–0 | 2015 May 20 | 835.137504(20) | 442.851 | 0.0 | 1.0 | 2.85 |
| 13CH+J = 1–0 | – | 830.216096(22) | 440.241 | 0.0 | 1.0 | 2.79 |
Notes. Frequencies and molecular data are taken from the Cologne Database for Molecular Spectroscopy (Müller et al. 2001), except for 32SH+, for which they are taken from direct laboratory measurements by Halfen & Ziurys (2015). See also Sect. 3. The sky frequencies were calculated using z = 0.88582 (heliocentric frame).
The coefficient α was defined in Eq. (2) and calculated under the assumption that the rotational excitation is coupled with the cosmic microwave background temperature, 5.14 K at z = 0.89 (see, e.g., Muller et al. 2013, 2014a). In case of hyperfine structure (SH+), the coefficient applies to the hyperfine-structure deconvolved line profile, normalized for an equivalent component with Sul = 1.
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