Open Access

Table A.3

Spectroscopic information of the transitions of g-ethyl formate detected toward G+0.693-0.027, shown in Figure A.1.

Frequency (GHz) Transition(a) log I (300 K) (nm2 MHz) Eup (K) Blending
33.515573 (29) 51,5–41,4 −6.0284 5.1 Blended: U-line *
35.398028 (20) 53,3–43,2 −6.1600 7.8 Unblended
36.604135 (25) 51,4–41,3 −5.9528 5.6 Blended HC9N and U-line *
40.121894 (74) 61,6–51,5 −5.7904 7.0 Blended: H2NCO and U-line *
40.929526 (64) 60,6–50,5 −5.7656 6.9 Blended: C2H5CHO
42.107618 (48) 62,5–52,4 −5.7887 8.3 Unblended
42.509261 (48) 63,4–53,3 −5.8557 9.9 Blended
42.622312 (49) 63,3–53,2 −5.8534 9.9 Blended: U-line *
43.765633 (58) 61,5–51,4 −5.7165 7.6 Unblended
46.69026 (16) 71,7–61,6 −5.5918 9.2 Blended: CH3C6H and U-line *

Notes. (a)The rotational energy levels are labeled using the conventional notation for asymmetric tops: JKa,Kc. Numbers in parentheses represent the predicted uncertainty associated to the last digits. Transitions that were not used in the AUTOFIT owing to a non-negligible contamination with a U-line are flagged with an asterisk (*).

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