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Table A.1

Compilation of optical observations and measured Hα equivalent widths for HD 54879.

No. Instrument Date HJD EWHα [Å]

1 FEROS 01-05-2009 2 454 953.54 –0.11
2 FIES 15-01-2011 2 455 576.54 –0.17
3 FEROS 22-03-2011 2 455 642.54 –0.45
4 FEROS 17-05-2011 2 455 698.54 –0.27
5 FEROS 19-05-2012 2 456 066.54 –0.46
6 FIES 26-12-2012 2 456 287.54 –0.17
7 FIES 16-02-2013 2 456 339.54 –0.12
8 HARPS 22-04-2014 2 456 770.04 0.02
9 HARPS 11-03-2015 2 457 093.04 –0.09
10 HARPS 14-03-2015 2 457 096.04 –0.18
11 SPO 16-03-2016 2 457 464.02 0.00
12 SPO 20-03-2016 2 457 468.02 –0.10
13 SPO 29-03-2016 2 457 476.99 –0.13
14 SPO 30-03-2016 2 457 477.98 –0.14
15 SPO 01-04-2016 2 457 479.97 –0.08
16 SPO 05-04-2016 2 457 483.98 –0.07
17 SPO 06-04-2016 2 457 484.97 –0.42
18 SPO 13-04-2016 2 457 491.96 0.09
19 SPO 14-04-2016 2 457 493.01 0.03
20 SPO 19-04-2016 2 457 497.96 0.11
21 SPO 20-04-2016 2 457 498.97 –0.15
22 SPO 21-04-2016 2 457 499.97 0.10
23 SPO 23-04-2016 2 457 501.97 0.11
24 SPO 30-04-2016 2 457 508.94 –0.16
25 SPO 11-05-2016 2 457 519.96 0.11
26 SPO 16-05-2016 2 457 524.93 –0.11
27 SPO 17-05-2016 2 457 525.94 –0.04
28 SPO 04-02-2017 2 457 789.07 0.15
29 SPO 16-02-2017 2 457 801.03 0.16
30 SPO 17-02-2017 2 457 802.03 0.11
31 SPO 23-02-2017 2 457 808.02 0.16
32 SPO 26-02-2017 2 457 811.03 0.19
33 SPO 27-02-2017 2 457 812.09 0.26
34 SPO 28-02-2017 2 457 813.11 0.36
35 SPO 06-03-2017 2 457 819.07 0.16
36 SPO 09-03-2017 2 457 822.02 0.19
37 SPO 16-03-2017 2 457 829.02 0.19
38 SPO 24-03-2017 2 457 837.00 0.28
39 SPO 27-03-2017 2 457 839.99 0.28
40 SPO 29-03-2017 2 457 841.99 0.34
41 SPO 01-04-2017 2 457 844.99 0.19
42 SPO 03-04-2017 2 457 846.98 0.34
43 SPO 05-04-2017 2 457 848.98 0.26
44 SPO 08-04-2017 2 457 851.97 0.24
45 SPO 10-04-2017 2 457 853.97 0.13

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