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Table 1

Molecular transitions studied in this paper.
Frequencya E upper/k a
Observation (MHz) (K)
CH3OCHO (277,21–267,20) A 335 015.90 443.5
CH3OH (22,1–31,2) 335 133.57 44.7
13CH3OH (121,11–120,12) 335 560.21 192.7
CH3OH (71,7–61,6) 335 582.02 79.0
CH3OCHO (279,18–269,17) A 336 111.32 277.9
CH3OH (147,8–156,9) 336 438.21 488.2
HC3N (37–36) 336 520.08 306.9
CH3OH (121,11–120,12) 336 865.15 197.1
CH3OCHO (266,20–256,19) E 336 889.20 235.5
CH3OCHO (266,20–256,19) A 336 918.18 235.5
C17O (3–2) 337 061.05 32.4
C34S (7–6) 337 396.69 50.2
CH3OH (70,7–60,6) vt = 1 337 748.83 488.5
CH3OH (71,6–61,5) vt = 1 337 969.44 390.1
H2CS (101,10–91,9) 338 083.20 102.4
SO2 (184,14–183,15) 338 305.99 196.8
CH3OH (73,4–63,3) 338 583.22 112.7
CH3OH (72,5–62,4) 338 639.80 102.7
H13CO+ (4–3) 346 998.34 41.6
13CH3OH (141,13–140,14) 347 188.28 254.3
SiO (8–7) 347 330.63 75.0
CH3OCHO (2810,19–2710,18) E 347 628.34 306.8
CH3OCHO (286,23–276,2) E 348 049.89 266.1
CH3OCHO (286,23–276,2) A 348 065.97 266.1
H2CS (101,9–91,8) 348 534.36 105.2
CH3OH (141,13–140,14) 349 107.00 260.2
CH313CN (19K–18K) 349 280.77b ...
CH3CN (19K–18K) 349 453.70b ...
HNCO (161,16–151,15) 350 333.35 186.2
CH3CN (K,l) v8 = 1 350 552.44c ...

Notes.

(a)

The frequencies are obtained from the Cologne Database for Molecular Spectroscopy (CDMS; Müller et al. 2001) and Jet Propulsion Laboratory (JPL; Pickett et al. 1998) catalogs. Eupper is the upper level energy, and k the Boltzmann constant.

(b)

The frequency is that of the K = 0 component.

(c)

The frequency is that of the K,l = 2, + 1 component.

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