Table 2.

Spectroscopic information (rest frequency, Einstein coefficients [$A_{\mathrm{u}\mathrm{l}}$], and energy of the upper levels [$E_{\mathrm{u}\mathrm{p}}$]) of the transitions of EtA that appear blended in the observed spectra of G+0.693 (see Fig. 3)

Frequency, GHz	Transition	log$A_{\mathrm{u}\mathrm{l}}$, ${\mathrm{s}}^{-1}$	$E_{\mathrm{u}\mathrm{p}}$, K
31.7653500	3(1,2)–2(1,1)	−6.00114	3.5
38.3746402	4(1,4)–3(1,3)	−5.71626	5.1
47.8493375	5(1,5)–4(1,4)	−5.40899	7.4
50.4153833	5(2,4)–4(2,3)	−5.39849	9.1
73.4680803	7(2,5)–6(2,4)	−4.85633	15.7
75.9126193	8(1,8)–7(1,7)	−4.78270	17.0
81.4338930	8(3,6)–7(3,5)	−4.74841	21.6
81.4392902	8(4,5)–7(4,4)	−4.80721	24.8
81.4863522	8(4,4)–7(4,3)	−4.80646	24.8
82.2698610	8(3,5)–7(3,4)	−4.73500	21.7
85.1653931	9(1,9)–8(1,8)	−4.62876	21.0
85.6467486	9(0,9)–8(0,8)	−4.62059	21.0
91.7192567	9(4,6)–8(4,5)	−4.62007	29.2
92.4964225	9(1,8)–8(1,7)	−4.52562	23.0
93.0416052	9(3,6)–8(3,5)	−4.55708	26.2
94.3821793	10(1,10)–9(1,9)	−4.49166	25.6
95.0023981	9(2,7)–8(2,6)	−4.49975	24.3
99.3388437	10(2,9)–9(2,8)	−4.43880	28.3
101.7229298	10(3,8)–9(3,7)	−4.42905	30.9
101.8639901	10(1,9)–9(1,8)	−4.39813	27.9
102.0183898	10(4,7)–9(4,6)	−4.45929	34.1
102.2528632	10(4,6)–9(4,5)	−4.45637	34.1
103.5718907	11(1,11)–10(1,10)	−4.36815	30.5
103.7762062	11(0,11)–10(0,10)	−4.36532	30.5
103.9759166	10(3,7)–9(3,6)	−4.39964	31.2
105.5481523	10(2,8)–9(2,7)	−4.35654	29.4
108.8642389	11(2,10)–10(2,9)	−4.31491	33.5
111.0166375	11(1,10)–10(1,9)	−4.28448	33.2
111.7757005	11(3,9)–10(3,8)	−4.29721	36.3
112.7422238	12(1,12)–11(1,11)	−4.25550	35.9
112.8698247	12(0,12)–11(0,11)	−4.25393	35.9

All transitions have line intensities $>$5 mK, according to the best LTE fit described in the text.