Resolving the distance controversy for Sharpless 269 - A possible kink in the outer arm

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Table 3.

Fitting results of parallax and proper motion for four 22 GHz water maser spots present in S 269 with respect to two extragalactic continuum sources, under the usual assumption that the quasars are stationary during our observations.

Maser	Quasar	π	μ_α cosδ	μ_δ	V_LSR	Combined	Combined
spot		(mas)	(mas yr⁻¹)	(mas yr⁻¹)	(km s⁻¹)	μ_α cos δ (mas yr⁻¹)	μ_δ (mas yr⁻¹)
I	J0613+1306	0.244 ± 0.010	−0.091 ± 0.024	−0.003 ± 0.029	19.6	−0.099 ± 0.019	−0.008 ± 0.020
	J0619+1454	0.243 ± 0.013	−0.107 ± 0.032	−0.012 ± 0.028

II	J0613+1306	−	0.518 ± 0.187	0.408 ± 0.099	19.0	0.507 ± 0.128	0.438 ± 0.076
	J0619+1454		0.497 ± 0.187	0.464 ± 0.124

III	J0613+1306	0.226 ± 0.013	0.173 ± 0.033	0.049 ± 0.039	18.2	0.170 ± 0.025	0.063 ± 0.028
	J0619+1454	0.228 ± 0.017	0.166 ± 0.041	0.078 ± 0.042

IV	J0613+1306	−	0.767 ± 0.115	−0.234 ± 0.194	20.4	0.763 ± 0.089	−0.185 ± 0.139
	J0619+1454		0.762 ± 0.144	−0.137 ± 0.206

V	J0613+1306	0.234 ± 0.033	−0.189 ± 0.032	−0.177 ± 0.057	16.6	−0.187 ± 0.052	−0.177 ± 0.057
	J0619+1454	0.214 ± 0.042	−0.108 ± 0.133	−0.207 ± 0.085

VI	J0613+1306	−	−0.639 ± 0.215	0.085 ± 0.068	19.8	−0.650 ± 0.147	0.080 ± 0.050
	J0619+1454		-0.661 ± 0.212	0.069 ± 0.082

VII	J0613+1306	0.254 ± 0.026	−0.108 ± 0.064	−1.255 ± 0.034	16.0	−0.111 ± 0.043	−1.254 ± 0.024
	J0619+1454	0.248 ± 0.024	−0.115 ± 0.060	−1.254 ± 0.035

VIII	J0613+1306	−	−0.209 ± 0.286	−1.602 ± 0.490	19.2	−0.031 ± 0.160	−1.580 ± 0.250
	J0619+1454		0.152 ± 0.120	−1.542 ± 0.347

IX	J0613+1306	−	0.950 ± 0.819	−2.142 ± 0.213	17.4	1.052 ± 0.529	−1.959 ± 0.139
	J0619+1454		1.149 ± 0.839	−1.772 ± 0.140

Combined		0.241 ± 0.012		Average		0.157 ± 0.066	-0.509 ± 0.037
parallax				proper motion

Notes. Radial velocities of those masers are also shown. The description of how the combined parallax and proper motion were obtained is described in Sect. 3.2. The first column gives the maser spot number used in Fig. 2. The annual parallax values (π) provided in the third column were fitted for only four masers (see Sect. 3.2). For the absolute proper motion fittings (Cols. 4,5,7,8), we fixed the parallax value in 0.241 ± 0.012 mas. The procedures to obtain the combined and average values reported in this table are described in Sect. 3.2.

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