Table 2.

Observed line parameters.

Source	Molecule	Transition	Frequency (MHz)	Eup (K)	Aul (s−1)	HPBW (″)	$\frac{B_{eff}}{F_{eff}}$	VLSR (km s−1)	Δv (km s−1)	$\int T_A^{\ast }dv\left(\mathrm{K}\mathrm{km}{\mathrm{s}}^{-1}\right)$
TMC-1	HCCCHO	90,9 – 80,8	83775.832	20.1	1.80 × 10−5	29.0	0.86	+5.72(5)	0.39(13)	0.006(2)
	HCCCHO	51,5 – 40,4	107556.726	9.6	8.58 × 10−6	22.6	0.83	+5.86(4)	0.48(8)	0.007(1)
	c-C3H2O	71,7 – 61,6	92517.434	17.2	8.11 × 10−5	26.3	0.85	+5.65(6)	0.43(13)	0.004(1)
B1-b	HCCCHO	90,9 – 80,8	83775.832	20.1	1.80 × 10−5	29.0	0.86	+6.43(6)	0.60(12)	0.012(2)
	c-C3H2O	71,6 – 61,5	103069.924	19.2	1.12 × 10−4	23.6	0.84	+6.49(4)	0.44(9)	0.006(1)
L483	HCCCHO	90,9 – 80,8	83775.832	20.1	1.80 × 10−5	29.0	0.86	+5.24(4)	0.34(12)	0.009(2)
	c-C3H2O	71,6 – 61,5	103069.924	19.2	1.12 × 10−4	23.6	0.84	+5.27(3)	0.26(6)	0.008(2)
Lupus-1A	HCCCHO	90,9 – 80,8	83775.832	20.1	1.80 × 10−5	29.0	0.86	+5.03(4)	0.38(10)	0.007(1)
	c-C3H2O	71,6 – 61,5	103069.924	19.2	1.12 × 10−4	23.6	0.84	+4.98(4)	0.34(10)	0.005(1)
L1495B	HCCCHO	90,9 – 80,8	83775.832	20.1	1.80 × 10−5	29.0	0.86	+7.60(4)	0.25(5)	0.005(1)
L1521F	HCCCHO	90,9 – 80,8	83775.832	20.1	1.80 × 10−5	29.0	0.86	+6.38(6)	0.46(11)	0.005(1)
Serpens South 1a	HCCCHO	90,9 – 80,8	83775.832	20.1	1.80 × 10−5	29.0	0.86	+7.51(5)	0.74(13)	0.020(3)

Numbers in parentheses are 1σ uncertainties in units of the last digits. Antenna temperature ($T_A^{\ast }$) can be converted to main beam brightness temperature (T_MB) by dividing by (B_eff/F_eff).