Table C.1

Synthetic fitting of the detected S-bearing species toward IRAS 16293-2422 A for an excitation temperature (T_ex) of 125 K and a source size of 2″. Directly across from a specific minor isotopolog under “Derived N of isotopologs” follows the column density of the main isotopolog upon the assumption of the standard isotopic ratio. In bold in the same column, we show the average column density of the main isotopolog based on all the available minor isotopologs (only if the minor isotopolog is optically thin and including the uncertainties).

Species	Transition	Frequency (GHz)	Eup (K)	Aij (s−1)	Beam size (″)	FWHM (km s−1)	N (cm−2)	Derived N of isotopologs (cm−2)	τ
H2S	22,0-21,1	216.710	84	4.9×10−5	6.0	4.5	op. thick		6.0
H2 33S	22,0,1-21,1,2	215.494	84	2.4×10−5	6.0	6.0			0.002
	22,0,1-21,1,1	215.497	84	2.4×10−5					0.002
	22,0,4-21,1,3	215.501	84	6.9×10−6					0.002
	22,0,4-21,1,4	215.503	84	4.1×10−5					0.010
	22,0,2-21,1,3	215.504	84	1.7×10−5					0.003
	22,0,2-21,1,2	215.505	84	1.9×10−5					0.003
	22,0,2-21,1,1	215.508	84	1.2×10−5					0.002
	22,0,3-21,1,3	215.512	84	2.8×10−5					0.007
	22,0,3-21,1,2	215.513	84	1.1×10−5					0.003
	22,0,3-21,1,4	215.513	84	9.1 ×10−6					0.002
H2 34S	22,0-21,1	214.377	84	4.7×10−5	6.0	7.0	>6.6×1015		0.1
OCS, υ = 0	19-18	231.061	111	3.6×10−5	5.6	4.5	op. thick		9.00
OC33S	18-17	216.147	99	2.9×10−5	6.0	6.0			0.05
O13CS	19-18	230.318	110	3.5×10−5	5.7	8.0			0.08
18OCS	19-18	216.753	104	3.0×10−5	6.0	9.0			0.01
OCS, υ2 = 1−	19-18	231.342	860	3.5×10−5	5.6	6.0			0.02
OCS, υ2 = 1+	19-18	231.584	860	3.5×10−5	5.6				0.02