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Table A.2

The chromospheric activity and longitudinal field measurements of 61 Cyg A for six epochs (2007.59, 2008.64, 2010.55, 2012.54, 2013.61, 2014.61, and 2015.54).

Epoch Julian date Rot. phase S-index Hα-index CaIRT-index B l N l
(2 454 000+) (G) (G)
4308.49809 0.00000 0.69 ± 0.02 0.402 ± 0.001 0.889 ± 0.003 –10.0 ± 0.9 –0.8 ± 0.9
4312.52989 0.11789 0.69 ± 0.02 0.402 ± 0.001 0.895 ± 0.003 –8.5 ± 0.9 –0.0 ± 0.9
4313.53121 0.14717 0.69 ± 0.01 0.401 ± 0.001 0.894 ± 0.004 –8.8 ± 1.1 –1.1 ± 1.1
4315.53608 0.20579 0.70 ± 0.02 0.401 ± 0.001 0.891 ± 0.003 –4.7 ± 0.9 0.1 ± 0.9
4316.53315 0.23494 0.68 ± 0.02 0.402 ± 0.001 0.892 ± 0.003 –5.4 ± 0.9 0.1 ± 0.9
2007.59 4317.53462 0.26423 0.71 ± 0.01 0.400 ± 0.001 0.889 ± 0.004 –4.3 ± 1.0 0.6 ± 1.0
4321.50738 0.38039 0.66 ± 0.02 0.399 ± 0.001 0.888 ± 0.004 0.0 ± 1.0 –0.2 ± 1.0
4322.52760 0.41022 0.62 ± 0.02 0.399 ± 0.001 0.889 ± 0.004 1.1 ± 1.1 –0.6 ± 1.1
4323.52773 0.43946 0.61 ± 0.01 0.400 ± 0.001 0.887 ± 0.005 1.7 ± 1.3 0.6 ± 1.3
4330.50089 0.64336 0.60 ± 0.02 0.399 ± 0.001 0.876 ± 0.002 –8.6 ± 0.6 –0.4 ± 0.6
4331.46147 0.67144 0.58 ± 0.01 0.401 ± 0.001 0.886 ± 0.003 –9.1 ± 0.9 0.4 ± 0.9
4688.54994 0.11263 0.73 ± 0.01 0.401 ± 0.001 0.898 ± 0.003 –2.9 ± 0.7 0.3 ± 0.7
4691.48653 0.19849 0.73 ± 0.02 0.401 ± 0.001 0.899 ± 0.003 –1.4 ± 0.8 –0.9 ± 0.8
4696.52126 0.34571 0.71 ± 0.03 0.402 ± 0.001 0.900 ± 0.004 1.0 ± 1.0 0.4 ± 1.0
4700.47785 0.46140 0.71 ± 0.02 0.400 ± 0.001 0.896 ± 0.004 –1.4 ± 0.8 0.2 ± 0.8
2008.64 4701.48433 0.49083 0.69 ± 0.04 0.402 ± 0.002 0.905 ± 0.006 –4.0 ± 1.5 –0.3 ± 1.5
4702.50793 0.52076 0.72 ± 0.01 0.400 ± 0.001 0.889 ± 0.003 –0.7 ± 0.6 0.4 ± 0.6
4703.47966 0.54917 0.72 ± 0.01 0.401 ± 0.001 0.887 ± 0.003 –1.0 ± 0.6 1.1 ± 0.6
4704.53225 0.57995 0.73 ± 0.01 0.401 ± 0.001 0.890 ± 0.003 –3.1 ± 0.6 –0.1 ± 0.6
4705.52953 0.60911 0.73 ± 0.02 0.401 ± 0.001 0.887 ± 0.003 –2.0 ± 0.6 0.2 ± 0.6
5351.64786 0.50146 0.65 ± 0.03 0.400 ± 0.001 0.892 ± 0.004 4.1 ± 1.0 –0.8 ± 1.0
5369.57210 0.02556 0.85 ± 0.03 0.402 ± 0.001 0.909 ± 0.004 0.3 ± 1.0 –0.6 ± 1.0
5379.58460 0.31832 0.79 ± 0.04 0.402 ± 0.001 0.901 ± 0.004 –2.1 ± 1.1 –1.9 ± 1.1
5390.54209 0.63871 0.74 ± 0.04 0.400 ± 0.001 0.899 ± 0.005 2.3 ± 1.2 1.4 ± 1.2
5391.52388 0.66742 0.73 ± 0.03 0.399 ± 0.001 0.894 ± 0.005 2.1 ± 1.2 1.6 ± 1.2
5392.54747 0.69735 0.76 ± 0.02 0.400 ± 0.001 0.893 ± 0.004 0.2 ± 0.9 1.0 ± 0.9
5393.63958 0.72928 0.84 ± 0.04 0.405 ± 0.001 0.900 ± 0.004 3.0 ± 1.1 –0.8 ± 1.1
2010.55 5396.60809 0.81608 0.79 ± 0.03 0.401 ± 0.001 0.901 ± 0.003 –0.2 ± 0.9 –0.7 ± 0.9
5401.65920 0.96378 0.81 ± 0.03 0.401 ± 0.001 0.901 ± 0.004 –7.9 ± 0.8 0.2 ± 0.8
5402.49800 0.98830 0.84 ± 0.03 0.401 ± 0.001 0.903 ± 0.004 –5.3 ± 0.8 –0.3 ± 0.8
5403.49549 0.01747 0.85 ± 0.03 0.403 ± 0.001 0.905 ± 0.004 –4.2 ± 0.8 0.5 ± 0.8
5411.49161 0.25127 0.81 ± 0.02 0.402 ± 0.001 0.904 ± 0.004 0.1 ± 0.9 –0.3 ± 0.9
5412.56953 0.28279 0.79 ± 0.02 0.402 ± 0.001 0.898 ± 0.003 0.1 ± 1.0 –0.6 ± 1.0
5415.55556 0.37010 0.77 ± 0.03 0.402 ± 0.001 0.902 ± 0.004 0.1 ± 1.0 –0.6 ± 1.0
5416.54320 0.39897 0.77 ± 0.01 0.402 ± 0.001 0.895 ± 0.004 1.4 ± 0.9 –1.5 ± 0.9
5419.56875 0.48745 0.74 ± 0.03 0.399 ± 0.001 0.892 ± 0.004 1.3 ± 0.9 0.1 ± 0.9
6117.63676 0.89879 0.61 ± 0.02 0.399 ± 0.001 0.880 ± 0.004 .. ..
6118.63476 0.92797 0.61 ± 0.02 0.400 ± 0.001 0.874 ± 0.005 .. ..
6124.64113 0.10360 0.61 ± 0.02 0.400 ± 0.001 0.872 ± 0.004 .. ..
6125.61827 0.13217 0.62 ± 0.02 0.400 ± 0.001 0.880 ± 0.003 .. ..
2012.54 6126.61222 0.16123 0.62 ± 0.02 0.401 ± 0.001 0.881 ± 0.004 .. ..
6127.56778 0.18917 0.62 ± 0.02 0.400 ± 0.001 0.884 ± 0.004 .. ..
6128.55829 0.21813 0.63 ± 0.02 0.400 ± 0.001 0.878 ± 0.004 .. ..
6131.55361 0.30572 0.65 ± 0.01 0.400 ± 0.001 0.885 ± 0.004 .. ..
6132.54263 0.33464 0.65 ± 0.02 0.400 ± 0.001 0.889 ± 0.004 .. ..
6133.56659 0.36458 0.65 ± 0.01 0.401 ± 0.001 0.885 ± 0.004 .. ..
6488.51321 0.74313 0.62 ± 0.06 0.399 ± 0.002 0.889 ± 0.006 3.4 ± 2.0 –2.7 ± 2.1
6507.65889 0.30295 0.63 ± 0.04 0.398 ± 0.001 0.884 ± 0.004 6.2 ± 1.2 0.5 ± 1.2
6509.51420 0.35720 0.60 ± 0.02 0.400 ± 0.001 0.881 ± 0.004 11.3 ± 0.9 0.3 ± 0.9
6510.61746 0.38946 0.61 ± 0.03 0.398 ± 0.001 0.890 ± 0.005 10.5 ± 1.3 –0.2 ± 1.3
6513.57114 0.47582 0.59 ± 0.02 0.398 ± 0.001 0.883 ± 0.004 9.0 ± 1.0 –0.1 ± 1.0
6514.54087 0.50417 0.59 ± 0.02 0.398 ± 0.001 0.883 ± 0.004 7.4 ± 0.9 –0.0 ± 0.9
2013.61 6515.54442 0.53352 0.58 ± 0.02 0.397 ± 0.001 0.876 ± 0.004 7.7 ± 0.9 –0.1 ± 0.9
6516.56402 0.56333 0.57 ± 0.01 0.398 ± 0.001 0.876 ± 0.004 7.9 ± 0.9 0.7 ± 0.9
6518.58190 0.62233 0.57 ± 0.02 0.398 ± 0.001 0.877 ± 0.004 8.6 ± 0.9 0.7 ± 0.9
6519.62914 0.65295 0.57 ± 0.02 0.398 ± 0.001 0.878 ± 0.004 7.9 ± 0.9 –0.2 ± 0.9
6523.51294 0.76652 0.56 ± 0.01 0.398 ± 0.001 0.877 ± 0.004 7.9 ± 1.0 –0.1 ± 1.0
6524.49914 0.79535 0.57 ± 0.02 0.399 ± 0.001 0.879 ± 0.004 7.4 ± 0.9 –1.4 ± 0.9
6525.44457 0.82300 0.57 ± 0.02 0.398 ± 0.001 0.878 ± 0.004 6.7 ± 1.0 –1.1 ± 1.0
6853.55493 0.41687 0.56 ± 0.04 0.399 ± 0.001 0.892 ± 0.005 6.8 ± 1.5 –1.6 ± 1.5
6856.55743 0.50466 0.55 ± 0.03 0.398 ± 0.001 0.894 ± 0.004 5.9 ± 1.1 –1.4 ± 1.1
6861.57410 0.65135 0.55 ± 0.02 0.400 ± 0.001 0.886 ± 0.004 8.0 ± 0.9 0.4 ± 0.9
6864.55546 0.73852 0.56 ± 0.02 0.400 ± 0.001 0.885 ± 0.004 5.0 ± 0.9 –0.7 ± 0.9
6865.53839 0.76726 0.56 ± 0.02 0.401 ± 0.001 0.885 ± 0.003 5.3 ± 0.9 –1.2 ± 0.9
6866.58350 0.79782 0.56 ± 0.01 0.400 ± 0.001 0.887 ± 0.003 3.6 ± 0.9 1.1 ± 0.9
2014.61 6881.38890 0.23073 0.58 ± 0.02 0.399 ± 0.001 0.889 ± 0.004 4.6 ± 1.1 1.7 ± 1.1
6889.36216 0.46386 0.55 ± 0.03 0.401 ± 0.002 0.890 ± 0.006 4.1 ± 1.7 0.0 ± 1.7
6893.46397 0.58380 0.54 ± 0.02 0.400 ± 0.001 0.882 ± 0.003 8.6 ± 0.9 1.2 ± 0.9
6895.46092 0.64219 0.54 ± 0.02 0.399 ± 0.001 0.887 ± 0.004 7.5 ± 1.1 0.9 ± 1.1
6897.47963 0.70121 0.54 ± 0.02 0.398 ± 0.001 0.878 ± 0.003 8.6 ± 0.9 –0.3 ± 0.9
6899.49512 0.76015 0.54 ± 0.01 0.400 ± 0.001 0.883 ± 0.003 7.3 ± 0.9 0.7 ± 0.9
6900.52575 0.79028 0.54 ± 0.01 0.399 ± 0.001 0.884 ± 0.004 8.4 ± 1.1 –0.9 ± 1.1
6901.48870 0.81844 0.54 ± 0.01 0.400 ± 0.001 0.883 ± 0.003 7.7 ± 0.9 –1.4 ± 0.9
7200.57599 0.56368 0.60 ± 0.03 0.400 ± 0.001 0.893 ± 0.004 –0.8 ± 1.2 0.3 ± 1.2
7202.53874 0.62107 0.60 ± 0.02 0.401 ± 0.001 0.889 ± 0.003 –0.5 ± 0.9 –1.1 ± 0.9
7203.59939 0.65208 0.59 ± 0.03 0.400 ± 0.001 0.886 ± 0.004 2.4 ± 1.0 1.0 ± 1.0
7204.56304 0.68026 0.59 ± 0.03 0.401 ± 0.001 0.890 ± 0.004 2.3 ± 1.0 0.4 ± 1.0
7211.52277 0.88376 0.64 ± 0.03 0.400 ± 0.001 0.896 ± 0.004 13.3 ± 1.0 –1.2 ± 1.0
7212.52460 0.91306 0.71 ± 0.05 0.401 ± 0.001 0.890 ± 0.005 14.1 ± 0.9 –0.5 ± 0.9
7213.50574 0.94174 0.67 ± 0.02 0.401 ± 0.001 0.897 ± 0.003 14.6 ± 0.9 0.3 ± 0.9
2015.54 7214.52800 0.97163 0.68 ± 0.05 0.401 ± 0.001 0.903 ± 0.005 13.7 ± 1.0 1.0 ± 1.0
7215.56071 0.00183 0.64 ± 0.03 0.402 ± 0.001 0.898 ± 0.004 13.9 ± 1.0 –0.7 ± 1.0
7216.54418 0.03059 0.67 ± 0.03 0.402 ± 0.001 0.900 ± 0.004 14.3 ± 0.9 –0.9 ± 0.9
7218.55681 0.08943 0.69 ± 0.03 0.403 ± 0.001 0.906 ± 0.004 12.4 ± 1.0 0.5 ± 1.0
7219.56343 0.11887 0.69 ± 0.05 0.403 ± 0.001 0.906 ± 0.005 12.0 ± 1.3 0.2 ± 1.3
7224.56050 0.26498 0.68 ± 0.03 0.401 ± 0.001 0.904 ± 0.005 3.5 ± 1.3 –0.2 ± 1.2
7240.48208 0.73053 0.62 ± 0.04 0.400 ± 0.001 0.897 ± 0.005 0.7 ± 1.3 1.1 ± 1.3
7245.54843 0.87866 0.65 ± 0.04 0.400 ± 0.001 0.896 ± 0.005 9.9 ± 1.4 0.2 ± 1.4
7246.57034 0.90855 0.63 ± 0.01 0.399 ± 0.001 0.892 ± 0.004 12.6 ± 1.0 0.3 ± 1.0

Notes. From left to right it represents: Julian date, rotational phase, S-index, Hα-index, CaIRT-index, longitudinal magnetic field (Bl), and magnetic field of the Null profile (Nl). The longitudinal magnetic field measurements are not included for 2012.54 epoch due to spectropolarimetric errors at NARVAL. See Sect. 3 for details.

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