Table 1
COM lines targeted with ARO 12 m, and selection of COM lines targeted with Yebes 40 m.
| Molecule | Transition | Frequency | Eu | Aul | gu | Tmb | RMS | Vel | FWHM | θbeam |
|---|---|---|---|---|---|---|---|---|---|---|
| (GHz) | (K) | (s−1) | (mK) | (mK) | (km s−1) | (km s−1) | (″) | |||
| ARO 12 m | ||||||||||
| CH3OH | 2−1,2−1−1,1 E | 96.739358(2) | 12.5 | 2.6E-06 | 20 | 1011.9 | 4.9 | 3.76(<1) | 1.10(<1) | 62.3 |
| 20,2−10,1 A+ | 96.741371(2) | 6.7 | 3.4E-06 | 20 | 1223.7 | 4.9 | 3.71(<1) | 1.12(<1) | 62.3 | |
| 20,2−10,1 E | 96.744545(2) | 20.1 | 3.4E-06 | 20 | 206.7 | 4.9 | 3.75(<1) | 1.20(<1) | 62.3 | |
| 13CH3OH | 2−1,2−1−1,1 E | 94.40516(5) | 12.4 | 2.3E-06 | 5 | 19.7 | 5.9 | 3.49(1) | 0.96(3) | 63.9 |
| 20,2−10,1 A | 94.407129(4) | 6.7 | 3.1E-06 | 5 | 30.6 | 5.0 | 3.59(1) | 0.74(2) | 63.9 | |
| CH2DOH | 11,0−10,1 e0 | 85.29690(10) | 6.2 | 4.5E-06 | 3 | 40.8 | 4.5 | 3.77(<1) | 0.57(1) | 70.9 |
| 21,1−20,2 e0 | 86.66886(10) | 10.6 | 4.6E-06 | 5 | 56.0 | 5.2 | 3.81(<1) | 0.90(1) | 69.6 | |
| 21,2–11,1 e0 | 88.07312(10) | 10.4 | 1.4E-06 | 5 | 15.6 | 3.8 | 3.64(1) | 0.52(2) | 68.5 | |
| 20,2−10,1 e0 | 89.40791(16) | 6.4 | 2.0E-06 | 5 | 64.0 | 4.6 | 3.63(<1) | 0.62(<1) | 67.4 | |
| CHD2OH | 21,2–11,2 e0 | 82.16582(10) | 9.1 | 1.6E-06 | 5 | 16.7 | 5.8 | 3.77(1) | 0.36(2) | 73.4 |
| 20,1−10,1 e0 | 83.28963(10) | 6.0 | 2.2E-06 | 5 | 24.8 | 4.1 | 3.54(1) | 0.34(1) | 72.4 | |
| CH3CHO | 21,2−10,1 A | 84.219749(3) | 5.0 | 2.4E-06 | 10 | − | 4.7 | − | − | 71.6 |
| 51,5–41,4 A | 93.580909(3) | 15.7 | 2.6E-05 | 22 | 42.0 | 6.2 | 3.72(1) | 0.95(1) | 64.4 | |
| 51,5−41,4 E | 93.595235(3) | 15.8 | 2.6E-05 | 22 | 48.5 | 6.9 | 3.80(<1) | 0.86(1) | 64.4 | |
| 50,5−40,4 E | 95.947437(3) | 13.9 | 3.0E-05 | 22 | 51.7 | 5.0 | 3.81(<1) | 0.90(1) | 62.8 | |
| 50,5−40,4 A | 95.963459(3) | 13.8 | 3.0E-05 | 22 | 54.0 | 5.3 | 3.85(<1) | 0.98(1) | 62.8 | |
| HCOOCH3 | 81,7−71,6 A a | 100.49068(1) | 22.7 | 1.4E-05 | 34 | 10.5 | 3.3 | 4.33(6) | 2.73(15) | 60.0 |
| 81,7−71,6 E a | 100.48224(1) | 22.7 | 1.4E-05 | 34 | 12.0 | 3.8 | 3.66(3) | 0.97(8) | 60.0 | |
| CH3OCH3 | 41,4−30,3 AA | 99.32607(10) | 10.2 | 5.5E-06 | 90 | − | 5.7 | − | − | 60.7 |
| 41,4−30,3 EE | 99.32522(10) | 10.2 | 5.5E-06 | 144 | – | 5.7 | – | – | 60.7 | |
| 41,4−30,3 AE+EA | 99.32436(10) | 10.2 | 5.5E-06 | 90 | − | 5.7 | − | − | 60.7 | |
| CH2CHCN | 91,8–81,7 | 87.312807(30) | 23.1 | 5.3E-05 | 57 | − | 4.3 | − | − | 69.0 |
| 100,10−90,9 | 94.276624(40) | 24.9 | 6.2E-05 | 63 | – | 4.1 | – | – | 64.0 | |
| 101,9–91,8 | 96.982447(40) | 27.8 | 7.2E-05 | 63 | − | 7.7 | − | − | 62.1 | |
| Yebes 40 m | ||||||||||
| CH3OH | 10,1−00,0 A | 48.372460(1) | 2.3 | 3.6E-07 | 12 | 778.3 | 7.3 | 3.75(<1) | 0.96(<1) | 37.4 |
| 1−0,1−0−0,0 E | 48.376887(1) | 15.4 | 3.6E-07 | 12 | 116.2 | 9.3 | 3.68(<1) | 0.93(<1) | 37.4 | |
| CH2DOH | 10,1−00,0 e0 | 44.713190(80) | 2.1 | 2.1E-07 | 3 | 26.5 | 5.2 | 3.33(1) | 0.69(3) | 40.5 |
| CH3CHO | 21,2−11,1 A | 37.464204(1) | 4.9 | 1.2E-06 | 10 | 32.3 | 2.0 | 3.86(1) | 0.88(3) | 48.3 |
| 21,2−11,1 E | 37.686932(2) | 5.0 | 1.1E-06 | 10 | 19.2 | 2.5 | 3.80(2) | 0.78(4) | 48.0 | |
| 20,2−10,1 E | 38.506034(1) | 2.8 | 1.7E-06 | 10 | 52.2 | 2.1 | 3.88(1) | 0.84(2) | 47.0 | |
| 20,2−10,1 A | 38.512079(1) | 2.8 | 1.7E-06 | 10 | 54.3 | 2.6 | 3.91(1) | 0.73(1) | 47.0 | |
| 21,1−11,0 E | 39.362537(2) | 5.2 | 1.3E-06 | 10 | 31.6 | 2.0 | 3.79(1) | 0.82(3) | 46.0 | |
| 21,1−11,0 A | 39.594289(1) | 5.1 | 1.4E-06 | 10 | 35.6 | 3.1 | 3.90(1) | 0.82(2) | 46.0 | |
| HCOOCH3 | 30,3 - 20,2 E | 36.102224(50) | 3.5 | 6.2E-07 | 14 | 6.9 | 1.9 | 3.81(5) | 0.76(11) | 50.1 |
| 30,3 - 20,2 A | 36.104793(50) | 3.5 | 6.2E-07 | 14 | 8.9 | 2.9 | 3.88(4) | 0.91(1) | 50.1 | |
| CH3OCH3 | 31,2−30,3 AE+EA | 32.977274(1) | 7.0 | 3.4E-07 | 70 | 6.8 | 1.7 | 3.60(6) | 1.04(14) | 54.8 |
| 31,2 - 30,3 EE | 32.978232(1) | 7.0 | 3.4E-07 | 112 | 8.6 | 1.5 | 3.78(4) | 0.67(8) | 54.8 | |
| 31,2−30,3 AA | 32.979187(1) | 7.0 | 3.4E-07 | 70 | 6.1 | 1.6 | 4.21(5) | 0.56(13) | 54.8 | |
| 51,4−50,5 AE+EA | 39.046259(1) | 15.4 | 5.0E-07 | 110 | – | – | – | – | 46.3 | |
| 51,4−50,5 EE | 39.047303(1) | 15.4 | 5.0E-07 | 176 | 10.6 | 1.9 | 4.19(3) | 0.70(7) | 46.3 | |
| 51,4−50,5 AA | 39.048346(1) | 15.4 | 5.0E-07 | 110 | − | − | − | − | 46.3 | |
Notes. Line information including frequency, upper energy (Eu), spontaneous emission coefficient (Aul) and the upper state degeneracy (gu) for CH3CHO and HCOOCH3 is from the JPL catalog (https://spec.jpl.nasa.gov/; Pickett et al. 1998) and for the remaining transitions from the CDMS database (https://cdms.astro.uni-koeln.de; Müller et al. 2001, 2005; Endres et al. 2016). The laboratory spectroscopic work for CH3OH is in Xu et al. (2008), for 13CH3OH in Xu & Lovas (1997), for CH2DOH in Pearson et al. (2012); Coudert et al. (2014), for CHD2OH in Drozdovskaya et al. (2022), for CH3CHO in Kleiner et al. (1996), HCOOCH3 in Bauder (1979); Karakawa et al. (2001); Ogata et al. (2004); Ilyushin et al. (2009), CH3OCH3 in Durig et al. (1976); Lovas et al. (1979); Endres et al. (2009), and for CH2CHCN in Stolze & Sutter (1985); Cazzoli & Kisiel (1988). The Gaussian fitting parameters for IRAS 16293E are also listed next to each line transition, where Tmb represents the peak intensity on the main temperature beam scale, rms is the 1σ standard deviation in the noise level, Vel is the line-of-sight centroid velocity, and FWHM is the full width at half maximum of the line. The telescope beam, θbeam, is listed in the last column. Numbers in parentheses denote 1σ uncertainties in units of the last quoted digit, where a <1 indicates an uncertainty in the fitting routine (with Pyspeckit) smaller than 0.01 km/s for the centroid velocity or FWHM. (a)Smoothed by three channels.
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