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Table 2

Hα equivalent width (EW) measurements of optical counterpart to XTE J1946+274.

Date MJD EW (Å) FWHM (Å) Telescope

2007-Jul.-18 54 299.816 37.35 ± 1.39 9.88 ± 0.27 RTT150
2012-Mar.-27 56 013.148 17.73 ± 0.76 11.09 ± 0.46 OSN
2012-Apr.-18 56 035.132 28.49 ± 1.20 11.57 ± 0.30 OSN
2012-May-22 56 069.014 41.65 ± 1.31 10.19 ± 0.46 OSN
2012-May-22 56 069.039 40.70 ± 1.39 9.87 ± 0.15 OSN
2012-May-28 56 075.024 45.16 ± 1.36 10.40 ± 0.78 NOT
2012-Jun.-19 56 097.997 39.87 ± 1.52 10.30 ± 0.11 OSN
2012-Jul.-4 56 112.963 45.07 ± 1.01 9.69 ± 0.74 OSN
2012-Jul.-5 56 113.030 47.62 ± 0.95 10.21 ± 0.94 OSN
2012-Jul.-29 56 137.922 39.12 ± 0.86 10.12 ± 0.32 RTT150
2012-Aug.-11 56 150.981 44.46 ± 1.18 10.62 ± 0.44 OSN
2012-Aug.-24 56 163.847 41.64 ± 1.74 10.14 ± 0.31 RTT150
2012-Sep.-15 56 185.758 40.00 ± 0.86 9.78 ± 0.31 RTT150
2012-Sep.-16 56 186.734 39.65 ± 1.15 9.76 ± 0.31 RTT150
2012-Oct.-09 56 209.917 42.18 ± 1.11 11.66 ± 0.26 OSN
2012-Dec.-11 56 272.669 42.58 ± 2.04 10.35 ± 0.31 RTT150
2013-Sep.-08 56 543.815 40.11 ± 1.35 9.88 ± 0.31 RTT150
2013-Nov.-08 56 604.714 36.11 ± 0.58 13.33 ± 0.13 RTT150
2013-Dec.-26 56 652.890 38.68 ± 1.79 14.09 ± 0.88 RTT150
2014-Jun.-19 56 827.041 39.60 ± 0.97 9.07 ± 0.49 RTT150
2014-Jul.-17 56 855.813 42.79 ± 1.10 9.95 ± 0.60 RTT150
2014-Aug.-03 56 872.859 41.06 ± 0.80 9.85 ± 0.43 RTT150
2014-Oct.-20 56 950.753 43.14 ± 1.28 9.83 ± 0.49 RTT150
2014-Oct.-21 56 951.774 42.37 ± 1.15 9.99 ± 0.45 RTT150
2014-Nov.-22 56 983.714 38.24 ± 1.12 10.00 ± 0.47 RTT150

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