Extended Data Table 2 Spectroscopic information of the brightest and cleanest detected transitions of 2,5-CT toward G+0.693 − 0.027, which are shown in Fig. 1 and were used to derive the physical parameters of the molecule

From: A detection of sulfur-bearing cyclic hydrocarbons in space

  1. Note: (a) The rotational energy levels are labeled using the conventional notation for asymmetric tops: \({J}_{{K}_{a},{K}_{c}}\), where J denotes the angular momentum quantum number, and the Ka and Kc labels are projections of J along the a and c principal axes. (b) We give the contribution of the (unknown) contamination to the overall area after subtracting the LTE fit of 2,5-CT from the observed spectrum, including also the contribution from all the molecules previously detected in the molecular line survey of G+0.693. (c) The S/N ratio is computed from the integrated signal (\(\int\,{T}_{{\rm{A}}}^{* }\) dv) and noise level, σ = rms \(\times \sqrt{\delta v\times {\rm{FWHM}}}\), where δv is the velocity resolution of the spectra and the FWHM is fitted from the data. Transitions with the * symbol are (auto)blended with another transition of 2,5-CT. Numbers in parentheses represent the predicted uncertainty associated to the last digits.
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