Observed lines of NCCHCS in TMC-1. The abscissa corresponds to the velocity scale that was derived using the frequencies given in Table B.1 for which a v_LSR of 5.83 kms⁻¹ was adopted (Cernicharo et al. 2020). The ordinate is the antenna temperature in milliKelvin. The blank channels correspond to negative features produced in the folding of the frequency-switching data. The red spectra correspond to the synthetic line profiles modeled with a rotational temperature of 8.5 K and a column density of 1.2 × 10¹¹ cm⁻².