Table A.1
Catalog of ammonia transitions that have been identified as masers in the ISM.
| Number | Transition | v | Elow /k | Eup/k | Discovery source & Reference |
|---|---|---|---|---|---|
| (J, K) | (MHz) | (K) | (K) | ||
| 1 | (1,1) | 23694.49550 | 22.12769 | 23.26484 | DR21, a |
| 2 | (2,2) | 23722.63330 | 63.30956 | 64.44806 | Sgr B2(M), b |
| 3 | (3,3) | 23870.12920 | 122.39346 | 123.53904 | W33, c |
| 4 | (5,5) | 24532.98870 | 294.19337 | 295.37076 | G9.26+0.19, d |
| 5 | (5,4) | 22653.02200 | 342.22451 | 343.31167 | W51-IRS2, e |
| 6 | (5,3) | 21285.27500 | 379.43682 | 380.45835 | W51-IRS2, f |
| 7 | (6,6) | 25056.02500 | 406.85658 | 408.05908 | NGC6334, g |
| 8 | (6,5) | 22732.42900 | 465.55043 | 466.64141 | W3(OH), h |
| 9 | (6,4) | 20994.61700 | 513.33957 | 514.34714 | Sgr B2(N), i |
| 10 | (6,3) | 19757.53800 | 550.36513 | 551.31333 | NGC7538, j |
| 11 | (6,2) | 18884.69500 | 576.73689 | 577.64321 | W51-IRS2, f |
| 12 | (6,1) | 18391.56200 | 592.52954 | 593.41219 | Sgr B2(N), i |
| 13 | (7,7) | 25715.18200 | 537.31664 | 538.55077 | W51-IRS2, f |
| 14 | (7,6) | 22924.94000 | 606.67824 | 607.77846 | W51-IRS2, f |
| 15 | (7,5) | 20804.83000 | 665.02736 | 666.02583 | W51-IRS2, e |
| 16 | (7,4) | 19218.46500 | 712.53838 | 713.46072 | W51-IRS2, f |
| 17 | (7,3) | 18017.33700 | 749.35187 | 750.21656 | Sgr B2(N), i |
| 18 | (8,6) | 20719.22100 | 834.46640 | 835.46076 | NGC6334, k |
| 19 | (8,5) | 18808.50700 | 892.42835 | 893.33101 | W51-IRS2, f |
| 20 | (8,4) | 17378.11000 | 939.62715 | 940.46116 | Sgr B2(N), i |
| 21 | (8,3) | 16455.09900 | 976.19662 | 976.98634 | Sgr B2(N), i |
| 22 | (9,9) | 27477.94300 | 851.45423 | 852.77295 | W51-IRS2, f |
| 23 | (9,8) | 23657.47100 | 942.18255 | 943.31792 | W51-IRS2, e |
| 24 | (9,7) | 20735.45200 | 1021.61682 | 1022.61196 | W51-IRS2, f |
| 25 | (9,6) | 18499.39000 | 1089.99977 | 1090.88760 | W51, NGC7538, W49, DR21(OH), j |
| 26 | (9,5) | 16798.13400 | 1147.53483 | 1148.34101 | Sgr B2(N), i |
| 27 | (9,4) | 15523.90000 | 1194.38934 | 1195.13437 | Sgr B2(N), i |
| 28 | (9,3) | 14376.81700 | 1230.70171 | 1231.39168 | Sgr B2(N), i |
| 29 | (10,9) | 24205.28700 | 1136.46581 | 1137.62748 | W51-IRS2, f |
| 30 | (10,8) | 20852.52700 | 1226.43274 | 1227.43349 | W51-IRS2, e |
| 31 | (10,7) | 18285.43400 | 1305.21064 | 1306.08820 | W51-IRS2, f |
| 32 | (10,6) | 16319.32400 | 1373.03592 | 1373.81912 | NGC7538, l |
| 33 | (11,9) | 21070.73900 | 1448.86263 | 1449.87386 | NGC6334, k |
| 34 | (12,12) | 31424.94300 | 1454.90272 | 1456.41088 | W51-IRS2, f |
| 35 | 15NH3 (3,3) | 22789.42170 | 124.64182 | 125.73554 | NGC7538, m |
| 36 | 15NH3 (4,3) | 21637.89450 | 238.70035 | 239.73880 | NGC7538, n |
| 37 | 15NH3 (4,4) | 23046.01580 | 202.51921 | 203.62523 | NGC7538, n |
Notes. The parameters of ammonia lines are taken from the Jet Propulsion Laboratory (JPL) molecular line catalog (Pickett et al. 1998, https://spec.jpl.nasa.gov/) and the Cologne Database for Molecular Spectroscopy (CDMS, Müller et al. 2005; Endres et al. 2016). For the last column, see a Gaume et al. (1996), b Mills et al. (2018), c Wilson et al. (1982), d Cesaroni et al. (1992), e Mauersberger et al. (1987), f Henkel et al. (2013), g Beuther et al. (2007), h Mauersberger et al. (1988), i Mei et al. (2020), j Madden et al. (1986), k Walsh et al. (2007), 1 Hoffman (2012), m Mauersberger et al. (1986), n Schilke et al. (1991).
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