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Table B.1.

6.7 GHz CH3OH maser parameters for G24.78+0.08 A1.

Feature Epochsa of Ipeak VLSR Δx Δy Vx Vy
number detection (Jy beam−1) (km s−1) (mas) (mas) (km s−1) (km s−1)
Cluster A1N
1 1,2,3 81.19 113.4 0.00±0.00 0.00±0.00 1.1± 0.7 −2.1± 0.8
2 1,2,3 20.18 114.1 −76.43±0.08 98.71±0.08 −2.4± 0.7 3.0± 0.8
3 1,2,3 5.39 114.8 −141.18±0.08 78.18±0.08 −4.9± 0.7 −0.4± 0.8
4b 1,2,3 3.87 114.1 −85.63±0.10 98.19±0.12 ... ...
5 1,2,3 1.48 114.4 −17.70±0.11 −55.32±0.13 3.8± 0.9 −7.1± 1.0
6 2 1.34 108.1 −391.01±0.25 −202.82±0.23 ... ...
7 1,2,3 1.00 113.0 −23.95±0.12 −36.47±0.13 −2.9± 0.9 −0.6± 1.0
8 1,2,3 0.85 114.2 −38.72±0.17 −29.44±0.20 9.3± 1.0 5.3± 1.3
9 1,2,3 0.73 110.2 −129.04±0.19 −75.49±0.23 1.3± 1.4 −4.3± 1.7
10 3 0.72 113.5 −74.69±0.21 97.88±0.29 ... ...
11 1,2,3 0.61 113.1 −106.98±0.25 106.19±0.34 −8.0± 1.8 7.9± 2.4
12 1,2 0.44 113.7 −14.33±0.22 88.61±0.28 ... ...
13 1,2,3 0.43 113.2 −55.02±0.31 −26.37±0.36 11.1± 1.9 0.5± 2.3
14 2,3 0.32 113.6 −52.07±0.27 97.14±0.47 ... ...
15 1,2,3 0.28 114.8 −27.68±0.27 106.88±0.36 −5.2± 1.7 5.3± 2.5
16 3 0.28 114.6 −41.37±0.15 −31.36±0.18 ... ...
17 1,2,3 0.27 116.6 −255.38±0.13 −116.67±0.16 −2.3± 1.3 2.8± 1.6
18 1,2,3 0.23 115.1 −32.27±0.26 −24.14±0.32 −0.4± 1.5 −5.8± 2.0
19 2 0.18 112.9 −16.29±0.18 −31.66±0.37 ... ...
20 1,2,3 0.18 114.7 −52.42±0.51 −46.18±0.70 8.7± 2.7 1.9± 3.9
21 2 0.18 113.6 −58.58±0.60 98.75±1.00 ... ...
22 3 0.18 113.6 −57.83±0.27 −27.14±0.33 ... ...
23 2 0.17 114.1 −79.88±0.39 −30.63±0.53 ... ...
24 1,2,3 0.15 108.9 −177.28±0.24 −115.33±0.32 3.7± 2.0 −3.4± 2.7
25 2,3 0.11 115.0 −149.75±0.28 102.65±0.44 ... ...
26b 1,2,3 0.11 112.8 60.09±0.42 25.85±0.59 ... ...
27 3 0.10 114.7 −23.32±0.35 76.34±0.54 ... ...
28 1,2,3 0.09 115.1 −49.71±0.38 102.99±0.44 −7.2± 4.4 9.8± 3.9
29 3 0.07 114.8 −155.87±0.55 −318.19±0.57 ... ...
30 1,2,3 0.07 109.4 −177.82±0.51 −91.35±0.68 −2.3± 4.0 −11.4± 5.7
31 3 0.06 109.2 −174.72±0.38 −110.64±0.61 ... ...
32 3 0.04 109.2 −189.65±0.61 −170.96±0.49 ... ...
Cluster A1SW
1 1,2,3 18.97 107.7 −441.61±0.09 −404.01±0.10 2.5± 0.8 −8.4± 0.9
2 1,2,3 11.43 107.8 −433.43±0.09 −404.94±0.10 5.8± 0.7 −11.2± 0.8
3 1,2,3 7.73 108.0 −408.71±0.09 −406.65±0.09 −0.9± 0.7 −10.8± 0.8
4 1,2,3 6.04 108.0 −377.97±0.11 −400.50±0.10 9.7± 0.8 −8.3± 0.9
5 2,3 4.67 108.0 −382.91±0.09 −402.05±0.10 ... ...
6 1,2,3 3.70 108.3 −426.44±0.08 −403.91±0.09 1.6± 0.7 −10.2± 0.8
7 1,2,3 2.79 108.2 −398.99±0.11 −403.38±0.12 −2.8± 0.9 −9.4± 1.0
8 3 1.36 107.7 −436.89±0.23 −656.05±0.17 ... ...
9 2 0.96 108.1 −393.44±0.29 −603.90±0.26 ... ...
10 2 0.74 108.1 −418.27±0.39 −608.02±0.31 ... ...
11 3 0.65 108.2 −392.87±0.12 −403.05±0.14 ... ...
12 2 0.46 108.2 −406.98±0.36 −605.24±0.51 ... ...
13 1,2,3 0.44 107.2 −482.45±0.16 −406.38±0.18 −1.2± 1.2 −11.0± 1.3
14 3 0.39 108.4 −372.17±0.17 −399.04±0.15 ... ...
15 1,2,3 0.21 108.7 −536.40±0.25 −376.26±0.21 7.5± 2.3 −10.3± 1.9
16 3 0.20 107.4 −386.48±0.36 −406.75±0.29 ... ...
17 2 0.19 108.6 −530.89±0.24 −377.59±0.31 ... ...
18 1,2,3 0.17 106.9 −288.59±0.39 −412.53±0.27 8.2± 3.8 −9.5± 2.5
19 2 0.15 108.4 −380.00±0.47 −527.35±0.66 ... ...
20 1,2,3 0.11 107.1 −316.94±0.66 −413.64±0.62 −0.6± 5.0 −9.2± 3.9
21 2 0.09 107.1 −301.78±0.49 −412.40±0.58 ... ...
22 1,2,3 0.08 106.9 −329.04±0.95 −417.53±0.96 13.5± 6.8 −9.5± 5.6
23 2 0.08 106.8 −277.69±0.61 −412.23±0.69 ... ...
24 3 0.07 106.8 −279.93±0.67 −412.96±0.33 ... ...
25 3 0.06 107.1 −293.87±0.83 −414.17±0.46 ... ...
26 1 0.05 106.4 −401.51±0.62 −384.93±0.78 ... ...
Centers of Motion
0-A1N 1,2,3 ... 113.4 −77.06±0.08 0.01±0.10 0.0± 0.0 0.0± 0.0
0-A1SW 1,2,3 ... 107.7 −403.69±0.13 −404.52±0.12 4.4± 1.0 −9.8± 0.9

Notes. (a) The three observing epochs are: 1) 2007 March 20; 2) 2009 March 12; 3) 2012 November 3. (b)Feature with not reliable proper motion, even if observed at three epochs. Column 1 gives the feature label number; Col. 2 lists the observing epochs at which the feature was detected; Cols. 3 and 4 provide the intensity of the strongest spot and the intensity-weighted LSR velocity, respectively, averaged over the observing epochs; Cols. 5 and 6 give the position offsets (with the associated errors) along the RA and Dec axes, relative to the persistent feature #1 of cluster A1N, measured at the first epoch of detection; Cols. 7 and 8 give the components of the relative proper motion (with the associated errors) along the RA and Dec axes, measured with respect to the reference feature #0-A1N (the “center of motion” of cluster A1N). The absolute position of the reference feature #1 in cluster A1N at the observing epoch on March 20, 2007, is: RA (J2000) = 18h 36m12.s5625, Dec (J2000) = −7° 12′ 10.′′811, with an accuracy of ±1 mas.

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