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Table B.1

S Per 1994 22-GHz H2O maser feature parameters. ΔV is the full velocity extent of the feature and ΔV1/2 is the FWHM, set to zero if a Gaussian spectral profile could not be fitted at  ≥ 3σ. x, y and a are the Cartesian and radial (in the plane of the sky) offsets from the centre of expansion. l is the angular extent of the feature and I is its peak.

V LSR ΔV ΔV1/2 x y a l I
(km s-1) (km s-1) (km s-1) (mas) (mas) (mas) (mas) (Jy)

–52.5 0.6 0.00 ± 0.00  − 11.6 ± 1.3  − 29.7 ± 1.3 31.8 ± 1.3 2.8 ± 7.2 0.15
–51.8 0.4 0.39 ± 0.13 0.5 ± 1.5  − 18.7 ± 1.5 18.8 ± 1.5 6.6 ± 7.1 0.22
–51.6 1.4 1.09 ± 0.17  − 11.4 ± 0.7  − 29.7 ± 0.7 31.8 ± 0.7 11.3 ± 8.0 0.35
–48.7 1.8 1.03 ± 0.04 8.8 ± 0.2  − 6.8 ± 0.2 11.2 ± 0.2 9.5 ± 6.0 0.80
–48.2 0.8 0.00 ± 0.00  − 28.8 ± 1.3  − 28.7 ± 1.3 40.7 ± 1.3 6.3 ± 6.8 0.19
–47.6 1.0 1.56 ± 1.21  − 23.1 ± 1.2  − 7.6 ± 1.2 24.4 ± 1.2 11.4 ± 7.0 0.13
–47.6 0.8 1.02 ± 0.42  − 9.3 ± 1.3  − 7.7 ± 1.3 14.5 ± 1.3 5.4 ± 5.4 0.14
–47.1 0.7 0.52 ± 0.05  − 28.0 ± 0.7  − 29.4 ± 0.7 40.6 ± 0.7 5.8 ± 4.0 0.45
–46.8 1.2 1.25 ± 0.48  − 15.5 ± 0.9  − 9.5 ± 0.9 18.3 ± 0.9 13.8 ± 4.6 0.22
–46.7 1.2 0.00 ± 0.00  − 27.5 ± 1.1 26.0 ± 1.1 37.9 ± 1.1 9.9 ± 4.7 0.24
–46.3 1.9 0.69 ± 0.01 12.6 ± 0.1 30.3 ± 0.1 32.8 ± 0.1 13.3 ± 6.2 7.05
–45.7 0.8 0.00 ± 0.00 31.3 ± 1.8  − 36.2 ± 1.8 47.9 ± 1.8 7.4 ± 9.7 0.09
–45.7 0.8 0.75 ± 0.23  − 25.6 ± 0.4  − 14.4 ± 0.4 29.4 ± 0.4 5.9 ± 5.7 1.11
–45.4 3.3 1.01 ± 0.04  − 18.6 ± 0.1 9.7 ± 0.1 21.0 ± 0.1 16.8 ± 2.8 46.21
–45.4 0.9 0.00 ± 0.00  − 37.9 ± 0.8  − 2.7 ± 0.8 38.1 ± 0.8 3.7 ± 3.1 0.94
–45.0 1.0 1.28 ± 0.64 21.5 ± 1.0 41.7 ± 1.0 46.9 ± 1.0 12.4 ± 4.2 0.42
–44.9 2.7 0.92 ± 0.02  − 19.0 ± 0.1  − 58.2 ± 0.1 61.2 ± 0.1 5.5 ± 5.3 8.12
–44.9 0.8 0.00 ± 0.00 3.2 ± 0.9 37.8 ± 0.9 37.9 ± 0.9 4.5 ± 4.6 0.42
–44.6 0.5 0.44 ± 0.09 21.0 ± 2.0  − 13.2 ± 2.0 25.9 ± 2.0 18.8 ± 7.1 0.15
–44.4 0.9 0.00 ± 0.00  − 37.1 ± 1.0 6.6 ± 1.0 37.7 ± 1.0 11.1 ± 4.6 0.85
–44.0 1.0 0.00 ± 0.00 2.6 ± 1.1 40.4 ± 1.1 40.8 ± 1.1 18.7 ± 5.0 0.48
–44.0 0.8 0.83 ± 0.30 24.0 ± 0.4 37.0 ± 0.4 44.1 ± 0.4 2.7 ± 2.2 0.85
–43.8 1.7 1.64 ± 1.02  − 15.3 ± 0.1 16.2 ± 0.1 22.3 ± 0.1 7.9 ± 2.1 1.96
–43.5 1.3 0.00 ± 0.00  − 24.5 ± 0.1 9.3 ± 0.1 26.3 ± 0.1 4.3 ± 2.0 2.04
–43.1 0.6 0.54 ± 0.11 19.9 ± 1.7  − 56.5 ± 1.7 59.9 ± 1.7 9.2 ± 6.7 0.15
–43.0 1.3 0.00 ± 0.00 25.9 ± 0.8  − 38.7 ± 0.8 46.6 ± 0.8 13.2 ± 6.3 0.38
–42.7 1.6 0.97 ± 0.07 31.9 ± 0.1 34.8 ± 0.1 47.2 ± 0.1 5.2 ± 1.1 3.26
–42.4 2.2 1.00 ± 0.00 44.1 ± 0.1  − 21.8 ± 0.1 49.2 ± 0.1 6.1 ± 5.3 1.43
–42.4 0.6 0.48 ± 0.08  − 32.4 ± 1.3 9.8 ± 1.3 33.8 ± 1.3 5.1 ± 4.3 0.44
–42.4 0.9 1.15 ± 0.69  − 14.7 ± 1.2 22.2 ± 1.2 26.8 ± 1.2 13.7 ± 6.7 0.27
–41.9 1.3 0.93 ± 0.13 29.1 ± 0.2  − 41.7 ± 0.2 50.9 ± 0.2 7.0 ± 1.4 1.29
–41.7 1.8 1.40 ± 0.21  − 51.8 ± 1.0 6.8 ± 1.0 52.2 ± 1.0 10.7 ± 13.6 0.39
–41.6 0.6 0.00 ± 0.00  − 4.9 ± 1.5  − 58.1 ± 1.5 58.4 ± 1.5 15.7 ± 6.2 0.31
–41.4 2.0 0.62 ± 0.01  − 65.4 ± 0.1  − 12.2 ± 0.1 66.5 ± 0.1 13.3 ± 6.1 5.07
–41.1 1.7 0.78 ± 0.00 33.3 ± 0.1 33.6 ± 0.1 47.3 ± 0.1 2.4 ± 0.3 14.35
–40.8 0.9 0.00 ± 0.00 31.1 ± 1.0  − 39.1 ± 1.0 49.9 ± 1.0 5.9 ± 4.2 0.24
–40.5 0.8 0.98 ± 0.54  − 0.1 ± 1.3  − 57.4 ± 1.3 57.4 ± 1.3 8.1 ± 6.9 0.21
–40.1 0.6 0.42 ± 0.03  − 69.0 ± 5.8  − 1.1 ± 5.8 69.1 ± 5.8 18.8 ± 19.4 0.23
–40.0 1.9 1.37 ± 0.16 42.7 ± 0.4  − 23.8 ± 0.4 48.9 ± 0.4 13.1 ± 7.3 0.42
–39.9 2.1 0.76 ± 0.02  − 13.5 ± 0.1 29.9 ± 0.1 32.8 ± 0.1 13.0 ± 6.7 2.92
–39.9 0.7 0.97 ± 0.84 32.8 ± 1.0  − 37.3 ± 1.0 49.7 ± 1.0 4.8 ± 4.3 0.30
–39.7 1.6 1.33 ± 0.29 35.8 ± 0.1 33.4 ± 0.1 49.0 ± 0.1 1.8 ± 0.3 4.65
–39.0 0.7 0.00 ± 0.00  − 4.9 ± 0.9 39.0 ± 0.9 39.3 ± 0.9 7.0 ± 3.6 0.25
–38.9 1.6 0.91 ± 0.08  − 49.6 ± 0.2  − 26.0 ± 0.2 56.1 ± 0.2 19.4 ± 5.7 0.90
–38.8 0.8 0.88 ± 0.31  − 68.0 ± 0.6 0.8 ± 0.6 68.0 ± 0.6 3.1 ± 2.4 0.30
–38.6 0.9 1.09 ± 0.89 23.0 ± 0.8  − 44.0 ± 0.8 49.6 ± 0.8 4.6 ± 7.8 0.67
–38.5 0.7 0.85 ± 0.44 36.9 ± 0.1 32.6 ± 0.1 49.3 ± 0.1 5.9 ± 2.6 2.11
–38.0 2.2 1.50 ± 0.14  − 43.6 ± 0.6  − 9.7 ± 0.6 44.6 ± 0.6 12.8 ± 5.1 0.43
–38.0 1.0 1.32 ± 0.73 48.2 ± 0.7 38.5 ± 0.7 61.8 ± 0.7 11.2 ± 4.8 0.84
–37.9 2.0 0.65 ± 0.01 42.3 ± 0.1 9.7 ± 0.1 43.4 ± 0.1 4.9 ± 4.7 72.77
–37.7 0.5 0.00 ± 0.00 72.4 ± 1.5 4.9 ± 1.5 72.6 ± 1.5 4.0 ± 6.2 0.69
–37.6 1.2 0.50 ± 0.01  − 4.9 ± 0.1 41.7 ± 0.1 42.0 ± 0.1 4.0 ± 8.0 7.44
–37.2 1.3 0.67 ± 0.02 23.5 ± 0.1  − 45.1 ± 0.1 50.9 ± 0.1 12.3 ± 5.4 1.43
–37.2 0.4 0.00 ± 0.00 27.8 ± 1.3  − 3.2 ± 1.3 28.0 ± 1.3 3.8 ± 3.7 0.32
–36.9 0.5 0.47 ± 0.12 23.5 ± 1.3  − 20.4 ± 1.3 31.2 ± 1.3 2.4 ± 4.1 0.23
–36.8 1.7 0.99 ± 0.07  − 62.4 ± 0.2  − 20.6 ± 0.2 65.8 ± 0.2 6.2 ± 5.8 0.69
–36.8 0.8 0.78 ± 0.33 1.4 ± 1.3  − 29.5 ± 1.3 29.6 ± 1.3 8.5 ± 5.8 0.30
–36.6 1.3 0.92 ± 0.11  − 35.2 ± 0.6  − 43.9 ± 0.6 56.2 ± 0.6 6.1 ± 5.7 0.45
–36.6 0.9 0.81 ± 0.18 54.4 ± 0.4 15.5 ± 0.4 56.6 ± 0.4 3.8 ± 3.8 0.40
–36.5 1.9 0.00 ± 0.00 41.5 ± 0.1 11.3 ± 0.1 43.0 ± 0.1 10.7 ± 7.8 3.77
–36.5 0.7 1.00 ± 0.72 30.6 ± 2.9  − 2.9 ± 2.9 30.8 ± 2.9 9.6 ± 12.3 0.29
–35.9 0.8 0.57 ± 0.05 0.6 ± 1.3  − 30.9 ± 1.3 31.0 ± 1.3 6.6 ± 6.1 0.14
–35.9 0.5 0.50 ± 0.13 3.3 ± 1.4 42.5 ± 1.4 42.6 ± 1.4 5.0 ± 8.3 0.14
–35.9 0.6 0.50 ± 0.09 10.5 ± 1.5  − 41.5 ± 1.5 42.8 ± 1.5 5.8 ± 4.9 0.20
–35.6 0.5 0.38 ± 0.05  − 50.1 ± 2.1  − 32.1 ± 2.1 59.6 ± 2.1 3.8 ± 8.2 0.41
–35.4 1.0 0.00 ± 0.00 27.7 ± 0.9  − 2.9 ± 0.9 27.8 ± 0.9 3.3 ± 4.9 1.44
–35.4 1.3 1.19 ± 0.32 6.0 ± 1.3  − 59.6 ± 1.3 60.0 ± 1.3 8.7 ± 11.2 0.44
–35.3 1.4 0.84 ± 0.32  − 23.9 ± 0.1  − 17.1 ± 0.1 29.4 ± 0.1 6.8 ± 4.1 11.24
–35.2 0.7 0.49 ± 0.04 14.0 ± 1.6 41.4 ± 1.6 44.2 ± 1.6 21.4 ± 7.2 0.29
–35.2 0.6 0.00 ± 0.00  − 20.4 ± 1.0 10.4 ± 1.0 22.9 ± 1.0 4.2 ± 5.3 0.50
–34.9 1.9 0.97 ± 0.01  − 35.8 ± 0.1  − 19.0 ± 0.1 40.5 ± 0.1 6.3 ± 1.5 1.44
–34.5 0.7 0.78 ± 0.33 32.8 ± 0.6 26.7 ± 0.6 42.3 ± 0.6 3.2 ± 2.9 0.33
–34.4 2.1 0.00 ± 0.00  − 25.7 ± 0.1  − 18.7 ± 0.1 31.8 ± 0.1 6.8 ± 1.6 11.86
–34.3 1.6 1.08 ± 0.11  − 22.2 ± 0.2 1.3 ± 0.2 22.3 ± 0.2 5.8 ± 1.4 1.75
–34.1 2.4 0.75 ± 0.01 18.5 ± 0.1  − 43.6 ± 0.1 47.4 ± 0.1 4.0 ± 4.1 10.16
–34.1 1.3 0.74 ± 0.03 3.7 ± 0.2 44.3 ± 0.2 44.5 ± 0.2 11.6 ± 6.6 1.07
–33.4 1.9 0.73 ± 0.01 31.5 ± 0.1 28.9 ± 0.1 42.8 ± 0.1 1.9 ± 1.2 17.62
–33.4 0.8 0.60 ± 0.06  − 41.3 ± 2.6  − 19.3 ± 2.6 45.6 ± 2.6 9.2 ± 10.7 0.47
–33.4 0.5 0.00 ± 0.00  − 15.5 ± 1.8  − 1.9 ± 1.8 16.4 ± 1.8 14.8 ± 5.9 0.49
–33.3 0.7 0.57 ± 0.11 21.5 ± 1.4  − 25.4 ± 1.4 33.3 ± 1.4 5.2 ± 7.6 0.19
–33.1 0.5 0.18 ± 0.04 34.3 ± 2.1  − 39.1 ± 2.1 51.9 ± 2.1 5.3 ± 8.0 0.33
–32.9 0.5 0.00 ± 0.00  − 22.6 ± 1.6 0.4 ± 1.6 22.6 ± 1.6 8.2 ± 5.7 0.25
–32.0 1.0 0.88 ± 0.52  − 5.1 ± 0.6 32.1 ± 0.6 32.5 ± 0.6 4.8 ± 3.6 0.78
–32.0 0.7 0.00 ± 0.00 27.5 ± 0.6 22.4 ± 0.6 35.5 ± 0.6 4.6 ± 5.6 0.68
–32.0 0.8 0.71 ± 0.36  − 43.9 ± 0.4  − 18.1 ± 0.4 47.5 ± 0.4 2.5 ± 3.6 1.02
–31.5 2.4 0.79 ± 0.03  − 32.5 ± 0.1  − 24.4 ± 0.1 40.7 ± 0.1 6.9 ± 1.0 53.76
–31.0 1.2 0.00 ± 0.00 7.9 ± 0.7 45.0 ± 0.7 45.6 ± 0.7 7.5 ± 6.5 1.28
–30.8 1.7 1.04 ± 0.11  − 4.9 ± 0.1 32.1 ± 0.1 32.5 ± 0.1 8.7 ± 0.9 2.81
–30.7 1.2 0.78 ± 0.09  − 19.4 ± 0.8  − 16.6 ± 0.8 25.8 ± 0.8 15.8 ± 6.9 0.41
–30.3 0.8 0.73 ± 0.17 4.8 ± 2.6  − 32.6 ± 2.6 32.9 ± 2.6 5.2 ± 15.1 0.22
–29.8 1.9 0.65 ± 0.01  − 37.7 ± 0.1  − 27.6 ± 0.1 46.7 ± 0.1 6.2 ± 1.8 12.96

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