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Table A.1.

Proper motion study of CM1, CM3, and CM4 with respect to CM2.

Component Epoch RA (J2000) Δx Dec (J2000) Δy Vx Vy |V| P.A.
(h m s) (″) (° ′ ″) (″) (mas yr−1) (mas yr−1) (km s−1) (°)
CM1 May 2009 18:54:00.49098 0.001 02.01:18.292 0.001
May 2014 18:54:00.48936 0.001 02.01:18.332 0.001 −2 ± 2 1 ± 2 20 ± 40
CM2 May 2009 18:54:00.6498 0.010 02.01:19.32 0.010
May 2014 18:54:00.6489 0.006 02.01:19.354 0.006 0 0 0
CM3 May 2009 18:54:00.766 0.030 02.01:22.82 0.030
May 2014 18:54:00.765 0.010 02.01:22.91 0.010 −1 ± 6 11 ± 6 120 ± 90
CM4 May 2009 18:54:00.523 0.060 02.01:15.60 0.060
May 2014 18:54:00.519 0.020 02.01:15.55 0.020 −10 ± 12 −17 ± 12 220 ± 200

Notes. Column 1: centimeter continuum components used for the proper motion calculation. Column 2: observational epochs. Columns 3 and 5: centroid position obtained from a two-dimensional Gaussian fit, and Cols. 4 and 6: positional uncertainties of the Gaussian fits as specified in Appendix A. Positions at the first epoch are obtained from Table 2 of Cyganowski et al. (2011). Columns 7 and 8: (relative) proper motion components in the east-west and north-south directions, respectively. Columns 9 and 10: magnitude of the proper motion and its position angle (east of north).

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