Table 1: Data of observed sources.
Name $V_{\rm lsr}$ $\sigma$ Maser velocities

${\rm km~s^{-1}}$ ${\rm km~s^{-1}}$ ${\rm km~s^{-1}}$

G08.671-0.354 33.7 1.6 39.2

G09.990-0.030 48.9 1.7 47.9 47.0 46.3 43.0 41.9 40.8

G10.313-0.152 14.7 1.0 11.4 12.2 13.0 14.3 15.5 16.7 20.0

G10.626-0.383 -3.4 2.8 -8.9 -8.0 -7.2 -6.0 -0.3 0.8 2.1 3.9 4.8 5.8

G10.632-0.337 -3.9 1.7 -13.0 -11.7 -10.9 -9.4 -8.1 -7.8 -6.5 -5.0 -1.3 -0.4

G10.962-0.016 21.0 2.1 24.7 24.4

G11.030+0.060 15.9 1.9 16.0 20.5

G11.500-1.500 10.6 1.3 16.2 15.3 14.8 14.3 13.4 13.0 10.0 8.9 8.0 7.2 6.7 6.3

G11.900-0.140 37.8 2.7 40.0 42.6 43.1 43.7

G11.992-0.275 59.5 2.2 60.2

G12.200-0.120 27.3 2.1 26.2 29.5 30.0 30.1 30.6 31.4

G12.209-0.103 24.2 2.7 19.5 20.4

G14.104+0.093 9.3 2.2 5.0 5.4 5.8 6.5 7.0 8.0 10.1 10.6 13.2 13.7 15.1 16.2

G15.033-0.677 19.8 1.9 21.0 22.8 23.2

G16.582-0.047 59.3 1.4 68.6 63.9 61.9 59.3 58.4 57.0

G16.868-2.158 17.5 2.0 14.7 16.9 18.4

G17.017-2.400 19.8 1.3 20.5 23.3

G17.640+0.160 22.5 1.3 19.7

G18.836-0.304 42.5 1.8 41.1 43.5 42.5

G19.470+0.017 18.8 3.1 20.6 21.3 22.3 24.1

G19.488+0.140 24.4 1.7 24.2 23.0 22.4 21.5 20.9 18.0

G19.610-0.132 57.6 1.8 56.2 52.4 50.2

G20.230+0.070 71.0 2.4 60.6 61.3 68.6 70.9 71.6 73.1 74.2 75.5 76.0 77.3

G22.358+0.064 84.6 1.6 85.0 80.0 77.0

G22.430-0.160 28.7 1.8 23.4 24.6 25.0 25.5 29.5 32.6 33.2 35.0 38.2 39.6

G23.245-0.240 63.2 2.1 63.9 64.7 66.0

G23.457+0.068 84.0 1.3 88.0 87.0 84.8 82.0

G24.330+0.140 112.8 2.3 108.2 110.1 111.9 113.0 114.3 115.3

G24.489-0.046 110.1 2.1 109.2 111.3 114.5 115.3

G24.790+0.080 110.7 2.0 107.5 107.8 109.3 110.1 111.6 112.0 113.0 113.8 114.5

G24.845+0.091 109.2 1.8 114.6 113.9 113.3 112.2 111.7 110.8 110.3 109.7 107.9 107.6 106.7

G25.720+0.050 100.5 2.1 89.7 91.1 91.8 92.3 93.5 94.5 94.8 95.4 96.3 99.9

G26.610-0.220 107.8 1.1 103.7 108.2 111.9 112.3 113.2

G27.280+0.150 31.8 2.4 35.0

G27.360-0.160 92.2 1.8 88.5 91.7 97.4 98.4 98.9 99.7 100.2 101.5 104.0

G28.840-0.232 96.0 1.5 99.8 91.7 90.9

G29.860-0.050 100.4 1.5 99.1 100.6 101.0 101.5 101.9 103.0 103.6

G29.956-0.017 97.3 1.7 104.5 103.9 103.4 102.5 101.8 101.2 100.1 98.9 98.2 97.7 96.5 95.7

G30.200-0.170 103.3 1.2 101.3 103.2 104.9 105.8 108.2 109.0 110.0 110.5

G30.220-0.180 104.5 1.4 111.4 113.2 113.5

G30.536+0.018 48.0 1.8 43.2

G30.590-0.040 42.3 2.1 42.5 45.3

G30.762-0.053 91.0 2.3 108.2 101.2 92.8 91.8 90.9 89.9 88.6 88.0 87.3 85.9

G30.780+0.230 41.6 1.4 47.5 49.3

G30.790-0.060 91.2 2.1 86.0 88.2 89.8 91.2 91.8

G32.089+0.091 95.2 1.4 92.8 94.5 95.4 98.3 99.5 100.8 101.0

G32.740-0.080 36.8 2.9 24.9 26.5 30.1 32.4 33.5 35.4 36.0 38.2 38.9 44.8

G32.750-0.070 37.0 2.4 30.1 31.8 32.3 33.0 33.5 37.4 38.2 38.9 37.0 35.8 36.2

G33.090-0.070 100.5 1.1 95.5 97.5 100.0 102.1 104.0 105.1

G33.417-0.004 74.8 1.6 102.1 102.4 104.8 105.1 106.1

G35.030+0.350 52.8 1.8 44.2 45.4 45.7

G36.110+0.550 75.9 1.4 70.4 72.0 73.0 74.4 76.1 82.2 84.0

G37.430+1.520 43.9 1.4 41.1

G43.790-0.120 44.0 2.8 39.4 39.9 40.3 43.0

G45.070+0.130 59.1 2.1 57.8

G45.490+0.130 60.6 1.9 59.7

G49.488-0.380 59.5 3.8 52.2 56.2 58.1 59.3 59.9 60.7

G49.570-0.270 52.6 2.0 58.0 59.3 62.8 63.8 64.9 66.0

G59.780+0.060 22.5 1.0 14.4 16.0 17.2 19.7 20.5 21.9 24.9 27.3

G73.060+1.080 0.7 0.8 -2.9 -2.5 6.0

G75.770+0.340 -1.4 2.2 -10.0 -9.7 -2.9 -0.7 -0.1 0.4

G109.90+2.120 -10.8 2.0 -4.9 -4.2 -3.9 -2.6 -2.0

G111.50+0.780 -57.4 1.8 -61.5 -60.9 -59.2 -58.1 -57.5 -56.4 -52.9 -48.9 -48.5

**Table 1:** Data of observed sources.
Name	$V_{\rm lsr}$	$\sigma$	Maser velocities
	${\rm km~s^{-1}}$	${\rm km~s^{-1}}$	${\rm km~s^{-1}}$
G08.671-0.354	33.7	1.6	39.2
G09.990-0.030	48.9	1.7	47.9	47.0	46.3	43.0	41.9	40.8
G10.313-0.152	14.7	1.0	11.4	12.2	13.0	14.3	15.5	16.7	20.0
G10.626-0.383	-3.4	2.8	-8.9	-8.0	-7.2	-6.0	-0.3	0.8	2.1	3.9	4.8	5.8
G10.632-0.337	-3.9	1.7	-13.0	-11.7	-10.9	-9.4	-8.1	-7.8	-6.5	-5.0	-1.3	-0.4
G10.962-0.016	21.0	2.1	24.7	24.4
G11.030+0.060	15.9	1.9	16.0	20.5
G11.500-1.500	10.6	1.3	16.2	15.3	14.8	14.3	13.4	13.0	10.0	8.9	8.0	7.2	6.7	6.3
G11.900-0.140	37.8	2.7	40.0	42.6	43.1	43.7
G11.992-0.275	59.5	2.2	60.2
G12.200-0.120	27.3	2.1	26.2	29.5	30.0	30.1	30.6	31.4
G12.209-0.103	24.2	2.7	19.5	20.4
G14.104+0.093	9.3	2.2	5.0	5.4	5.8	6.5	7.0	8.0	10.1	10.6	13.2	13.7	15.1	16.2
G15.033-0.677	19.8	1.9	21.0	22.8	23.2
G16.582-0.047	59.3	1.4	68.6	63.9	61.9	59.3	58.4	57.0
G16.868-2.158	17.5	2.0	14.7	16.9	18.4
G17.017-2.400	19.8	1.3	20.5	23.3
G17.640+0.160	22.5	1.3	19.7
G18.836-0.304	42.5	1.8	41.1	43.5	42.5
G19.470+0.017	18.8	3.1	20.6	21.3	22.3	24.1
G19.488+0.140	24.4	1.7	24.2	23.0	22.4	21.5	20.9	18.0
G19.610-0.132	57.6	1.8	56.2	52.4	50.2
G20.230+0.070	71.0	2.4	60.6	61.3	68.6	70.9	71.6	73.1	74.2	75.5	76.0	77.3
G22.358+0.064	84.6	1.6	85.0	80.0	77.0
G22.430-0.160	28.7	1.8	23.4	24.6	25.0	25.5	29.5	32.6	33.2	35.0	38.2	39.6
G23.245-0.240	63.2	2.1	63.9	64.7	66.0
G23.457+0.068	84.0	1.3	88.0	87.0	84.8	82.0
G24.330+0.140	112.8	2.3	108.2	110.1	111.9	113.0	114.3	115.3
G24.489-0.046	110.1	2.1	109.2	111.3	114.5	115.3
G24.790+0.080	110.7	2.0	107.5	107.8	109.3	110.1	111.6	112.0	113.0	113.8	114.5
G24.845+0.091	109.2	1.8	114.6	113.9	113.3	112.2	111.7	110.8	110.3	109.7	107.9	107.6	106.7
G25.720+0.050	100.5	2.1	89.7	91.1	91.8	92.3	93.5	94.5	94.8	95.4	96.3	99.9
G26.610-0.220	107.8	1.1	103.7	108.2	111.9	112.3	113.2
G27.280+0.150	31.8	2.4	35.0
G27.360-0.160	92.2	1.8	88.5	91.7	97.4	98.4	98.9	99.7	100.2	101.5	104.0
G28.840-0.232	96.0	1.5	99.8	91.7	90.9
G29.860-0.050	100.4	1.5	99.1	100.6	101.0	101.5	101.9	103.0	103.6
G29.956-0.017	97.3	1.7	104.5	103.9	103.4	102.5	101.8	101.2	100.1	98.9	98.2	97.7	96.5	95.7
G30.200-0.170	103.3	1.2	101.3	103.2	104.9	105.8	108.2	109.0	110.0	110.5
G30.220-0.180	104.5	1.4	111.4	113.2	113.5
G30.536+0.018	48.0	1.8	43.2
G30.590-0.040	42.3	2.1	42.5	45.3
G30.762-0.053	91.0	2.3	108.2	101.2	92.8	91.8	90.9	89.9	88.6	88.0	87.3	85.9
G30.780+0.230	41.6	1.4	47.5	49.3
G30.790-0.060	91.2	2.1	86.0	88.2	89.8	91.2	91.8
G32.089+0.091	95.2	1.4	92.8	94.5	95.4	98.3	99.5	100.8	101.0
G32.740-0.080	36.8	2.9	24.9	26.5	30.1	32.4	33.5	35.4	36.0	38.2	38.9	44.8
G32.750-0.070	37.0	2.4	30.1	31.8	32.3	33.0	33.5	37.4	38.2	38.9	37.0	35.8	36.2
G33.090-0.070	100.5	1.1	95.5	97.5	100.0	102.1	104.0	105.1
G33.417-0.004	74.8	1.6	102.1	102.4	104.8	105.1	106.1
G35.030+0.350	52.8	1.8	44.2	45.4	45.7
G36.110+0.550	75.9	1.4	70.4	72.0	73.0	74.4	76.1	82.2	84.0
G37.430+1.520	43.9	1.4	41.1
G43.790-0.120	44.0	2.8	39.4	39.9	40.3	43.0
G45.070+0.130	59.1	2.1	57.8
G45.490+0.130	60.6	1.9	59.7
G49.488-0.380	59.5	3.8	52.2	56.2	58.1	59.3	59.9	60.7
G49.570-0.270	52.6	2.0	58.0	59.3	62.8	63.8	64.9	66.0
G59.780+0.060	22.5	1.0	14.4	16.0	17.2	19.7	20.5	21.9	24.9	27.3
G73.060+1.080	0.7	0.8	-2.9	-2.5	6.0
G75.770+0.340	-1.4	2.2	-10.0	-9.7	-2.9	-0.7	-0.1	0.4
G109.90+2.120	-10.8	2.0	-4.9	-4.2	-3.9	-2.6	-2.0
G111.50+0.780	-57.4	1.8	-61.5	-60.9	-59.2	-58.1	-57.5	-56.4	-52.9	-48.9	-48.5

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