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Table 1

Measured line properties for C nα stacked recombination lines towards Cas A.

Transition (n) Frequency (MHz) Line centroid (km s−1) Line integrated intensity (m.s−1) Linewidth (km s−1)
656 23.25 −50.67 ± 8.94 −41.83 ± 10.57 −3.45 ± 9.34 101.45 ± 49.1 85.82 ± 41.84 21.46 ± 14.59 32.99 ± 4.47 31.07 ± 3.09 28.29 ± 11.23
676 21.25 −51.11 ± 6.67 −42.31 ± 7.86 −3.77 ± 7.53 138.98 ± 26.74 73.46 ± 23.71 28.84 ± 24.02 44.17 ± 7.58 33.9 ± 5.77 32.94 ± 18.06
696 19.47 −50.88 ± 6.67 −41.42 ± 7.51 −4.24 ± 7.47 153.01 ± 36.94 72.79 ± 18.21 33.55 ± 20.63 52.37 ± 13.71 40.74 ± 10.47 39.72 ± 14.13
721 17.52 −49.99 ± 2.69 −40.01 ± 2.59 −2.6 ± 4.01 159.67 ± 29.36 76.7 ± 14.87 29.01 ± 21.99 63.07 ± 15.3 48.9 ± 11.27 45.74 ± 25.3
751 15.5 −50.25 ± 4.58 −40.4 ± 4.47 −3.83 ± 5.26 143.21 ± 47.5 70.41 ± 25.01 38.83 ± 40.62 69.09 ± 14.4 68.84 ± 20.52 55.54 ± 39.94
781 13.78 −48.84 ± 1.97 −38.85 ± 1.99 −2.66 ± 2.51 147.56 ± 43.05 73.69 ± 27.26 30.5 ± 47.66 94.67 ± 23.13 88.45 ± 30.04 55.49 ± 49.11
811 12.31 −47.73 ± 0.87 −37.73 ± 0.87 −1.72 ± 0.85 115.67 ± 52.17 56.84 ± 25.79 16.09 ± 51.42 100.45 ± 26.15 111.69 ± 51.63 75.15 ± 87.73
841 11.04 −49.74 ± 3.06 −39.74 ± 3.06 −3.56 ± 2.93 84.39 ± 59.75 42.07 ± 28.16 4.72 ± 20.25 120.99 ± 131.2 119.73 ± 74.17 70.71 ± 148.74

Notes. For n > 636, the uncertainties on the measurements are computed based on the statistical method described in Sect. 4.1.2.

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