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Table C.1

Astrometric epochs of each pair in our sample.

Object Date Telescope Method1 Filter Sep. (′′) PA (°) Magn. diff. Ref.
LkCa 3 B 1990-12-06 CAHA 3.5 m SI K 0.470 ± 0.040 78.0 ± 1.0 0.753 ± 0.055 19
1991-10-18 Palomar/Hale 5.1 m SI K 0.491 ± 0.009 77.0 ± 1.0 0.049 ± 0.006 9
1993-10-05 CAHA 3.5 m SI J 0.494 ± 0.013 74.5 ± 0.7 0.519 ± 0.036 19
1996-09-29 CAHA 3.5 m SI H 0.485 ± 0.004 74.2 ± 0.3 0.170 ± 0.014 19
1997-11-19 CAHA 3.5 m SI K 0.485 ± 0.004 73.4 ± 0.1 0.305 ± 0.011 19
1997-12-05 NASA ITF/NSFCAM SI K 0.479 ± 0.010 72.8 ± 1.0 0.225 ± 0.044 20
1997-12-09 NASA ITF/NSFCAM SI L 0.478 ± 0.009 73.0 ± 1.4 0.120 ± 0.044 20
2001-12-01 Keck I K 0.470 ± 0.010 72.0 ± 1.0 0.180 ± 0.028 26
2001-12-01 Keck I L 0.470 ± 0.010 72.0 ± 1.0 0.170 ± 0.010 26
2002-11-13 Keck I SiC 0.480 ± 0.020 76.0 ± 2.0 0.373 ± 0.047 26
2006-11-11 CAHA 2.2 m LI RG830 0.477 ± 0.020 68.7 ± 1.9 0.575 ± 0.021 40
2008-01-17 Keck AO K 0.484 ± 0.001 69.1 ± 0.1 0.067 ± 0.009 32
DD Tau B 1990-10-23 CFHT I H− α, cont 0.550 ± 0.030 184.0 ± 2.0 0.450 ± 0.101 6
1990-11-06 CFHT I R 0.560 ± 0.020 184.0 ± 2.0 0.100 ± 0.101 6
1990-11-08 CFHT I 6840/90 0.560 ± 0.040 185.0 ± 3.0 0.000 ± 0.201 6
1990-12-05 CFHT SI L 0.560 ± 0.010 186.2 ± 1.5 0.649 ± 0.040 6, 11
1990-12-15 CAHA 3.5 m SI K 0.570 ± 0.030 188.0 ± 2.0 0.485 ± 0.017 8, 10
1991-10-04 Palomar/Hale 5.1 m SI K 0.560 ± 0.010 186.0 ± 1.0 0.708 ± 0.012 9
1991-10-11 CFHT I V 0.560 ± 0.020 182.0 ± 3.0 0.000 ± 0.151 6
1991-10-11 CFHT I I 0.550 ± 0.020 184.0 ± 2.0 0.000 ± 0.101 6
1996-12-05 NASA ITF/NSFCAM SI K 0.555 ± 0.010 182.3 ± 1.0 0.173 ± 0.055 20
1996-12-06 NASA ITF/NSFCAM SI L 0.557 ± 0.011 182.7 ± 1.1 0.589 ± 0.083 20
1997-12-05 NASA ITF/NSFCAM SI K 0.555 ± 0.010 182.1 ± 1.0 0.402 ± 0.035 20
1999-09-06 HST I Clear 0.568 ± 0.014 182.1 ± 1.0 – 22
1999-11-17 Keck I N 0.540 ± 0.010 179.0 ± 2.0 0.608 ± 0.050 26
2006-11-11 CAHA 2.2 m LI Johnson I 0.568 ± 0.034 179.0 ± 3.3 1.123 ± 0.055 40
LkCa 7 B 1991-09-15 CAHA 3.5 m SI K 1.050 ± 0.010 25.0 ± 2.0 0.630 ± 0.039 8, 10
1997-12-09 NASA ITF/NSFCAM SI L 1.021 ± 0.019 24.3 ± 1.0 0.594 ± 0.059 20
1999-01-26 HST I Clear 1.035 ± 0.014 25.2 ± 0.6 – 22
2001-12-01 Keck I K 0.980 ± 0.020 25.0 ± 1.0 0.669 ± 0.030 26
2001-12-01 Keck I L 0.990 ± 0.020 25.0 ± 1.0 0.677 ± 0.012 26
2006-11-11 CAHA 2.2 m LI Johnson I 1.006 ± 0.031 23.9 ± 1.8 0.881 ± 0.054 40
FV Tau B 1989-10-17 CAHA 3.5 m O K 0.735 ± 0.015 271.5 ± 1.5 0.182 ± 0.010 5
1990-07-18 IRTF O K 0.720 ± 0.010 270.0 ± 5.0 0.200 ± 0.011 7
1991-10-20 Palomar/Hale 5.1 m SI K 0.730 ± 0.010 272.0 ± 1.0 0.483 ± 0.028 9
1996-12-05 NASA ITF/NSFCAM SI K 0.704 ± 0.013 271.6 ± 1.0 0.429 ± 0.008 20
1996-12-05 NASA ITF/NSFCAM SI L 0.712 ± 0.014 271.9 ± 1.0 0.408 ± 0.031 20
1997-03-06 HST I F814W 0.718 ± 0.002 272.5 ± 0.2 0.891 ± 0.006 20
1999-11-17 Keck I N 0.710 ± 0.0202 272.1 ± 0.82 0.856 ± 0.099 26
2000-12-02 HST I Clear 0.711 ± 0.014 273.0 ± 0.8 – 22
2002-11-13 VLT/NACO I NB_1.64 0.703 ± 0.004 273.3 ± 0.2 1.818 ± 0.003 25, 40
2002-11-13 VLT/NACO I NB_2.12 0.707 ± 0.004 273.1 ± 0.2 1.299 ± 0.005 25, 40
2002-11-13 VLT/NACO I NB_2.17 0.710 ± 0.004 273.2 ± 0.2 1.276 ± 0.006 25, 40
2006-11-11 CAHA 2.2 m LI Johnson I 0.684 ± 0.041 272.2 ± 1.6 2.677 ± 0.058 40
2012-09-25 Gemini North AO K 0.693 ± 0.001 274.5 ± 0.1 1.010 ± 0.011 37
2012-11-17 ALMA R 1.3 mm 0.696 ± 0.046 274.4 ± 3.0 0.043 ± 0.044 34
2012-11-17 ALMA R 850 μm 0.696 ± 0.046 274.4 ± 3.0 0.140 ± 0.065 34
FV Tau/c B 1990-07-18 IRTF O K 0.743 ± 0.140 293.0 ± 3.0 1.900 ± 0.096 7
1996-12-05 NASA ITF/NSFCAM SI K 0.701 ± 0.014 293.3 ± 1.0 2.211 ± 0.029 20
1996-12-06 NASA ITF/NSFCAM SI L 0.703 ± 0.014 293.8 ± 1.0 1.160 ± 0.056 20
1997-03-06 HST I F814W 0.713 ± 0.002 294.0 ± 0.1 3.696 ± 0.116 20
1998-12-06 HST I Clear 0.701 ± 0.014 293.6 ± 0.8 – 22
1999-11-17 Keck I N 0.670 ± 0.020 292.0 ± 1.0 0.327 ± 0.133 26
2002-11-12 Keck I SiC 0.680 ± 0.020 295.0 ± 1.0 0.312 ± 0.058 26
2002-11-13 VLT/NACO I NB_1.64 0.688 ± 0.004 294.5 ± 0.3 1.924 ± 0.003 25, 40
2002-11-13 VLT/NACO I NB_2.12 0.688 ± 0.004 294.5 ± 0.3 1.632 ± 0.006 25, 40
2002-11-13 VLT/NACO I NB_2.17 0.689 ± 0.004 294.6 ± 0.3 1.746 ± 0.006 25, 40
2006-11-11 CAHA 2.2 m LI Johnson I 0.630 ± 0.044 294.4 ± 3.2 3.111 ± 0.060 40
UX Tau AC 1988-01-15 CTIO I K 2.700 ± 0.100 181.0 ± 2.0 2.910 ± 0.021 4
1991-10-27 Kitt Peak/0.9 m I R 2.600 ± 0.053 182.0 ± 1.0 4.430 ± 0.191 12
1997-12-06 NASA ITF/NSFCAM I K 2.632 ± 0.027 180.2 ± 1.0 3.070 ± 0.103 20
1997-12-06 NASA ITF/NSFCAM I L 2.634 ± 0.033 180.2 ± 1.0 3.451 ± 0.091 20
2002-10-22 VLT/NACO I NB_1.64 2.684 ± 0.005 181.5 ± 0.1 3.392 ± 0.002 25, 40
2002-10-22 VLT/NACO I NB_2.12 2.684 ± 0.005 181.6 ± 0.1 2.970 ± 0.001 25, 40
2002-10-22 VLT/NACO I NB_2.17 2.682 ± 0.005 181.6 ± 0.1 3.135 ± 0.001 25, 40
2002-11-12 Keck I SiC 2.500 ± 0.300 181.0 ± 5.0 4.440 ± 0.131 26
2006-11-12 CAHA 2.2 m LI RG830 2.705 ± 0.047 180.5 ± 0.5 3.478 ± 0.055 40
2009-10-26 Keck II AO K 2.711 ± 0.004 181.6 ± 0.1 3.212 ± 0.107 33
2011-10-12 Keck II AO K 2.716 ± 0.002 181.6 ± 0.1 3.122 ± 0.062 33
2013-01-28 Keck II AO K 2.720 ± 0.003 181.6 ± 0.1 2.845 ± 0.182 33
UX Tau AB 1944-04-01 McDonald/2.1 m I Z 5.740 ± 0.109 270.1 ± 0.2 – 1
1988-01-15 CTIO I K 5.900 ± 0.100 269.0 ± 2.0 1.350 ± 0.021 4
1991-10-27 Kitt Peak/0.9 m I R 5.800 ± 0.116 270.0 ± 1.0 1.840 ± 0.016 12
1997-12-06 NASA ITF/NSFCAM I K 5.860 ± 0.110 269.4 ± 1.0 1.480 ± 0.087 20
1997-12-06 NASA ITF/NSFCAM I L 5.860 ± 0.110 269.3 ± 1.0 2.149 ± 0.029 20
2002-10-22 VLT/NACO I NB_1.64 5.846 ± 0.009 269.7 ± 0.1 2.216 ± 0.004 25, 40
2002-10-22 VLT/NACO I NB_2.12 5.839 ± 0.009 269.7 ± 0.1 2.188 ± 0.002 25, 40
2002-10-22 VLT/NACO I NB_2.17 5.841 ± 0.009 269.7 ± 0.1 2.097 ± 0.003 25, 40
2002-11-12 Keck I SiC 5.600 ± 0.100 268.0 ± 1.0 2.689 ± 0.165 26
2006-11-12 CAHA 2.2 m LI RG830 5.874 ± 0.053 268.6 ± 0.5 1.422 ± 0.054 40
2009-10-26 Keck II AO K 5.921 ± 0.0033 270.1 ± 0.13 2.269 ± 0.054 33
2011-10-12 Keck II AO K 5.908 ± 0.0023 269.9 ± 0.13 2.181 ± 0.081 33
2013-01-28 Keck II AO K 5.906 ± 0.0073 269.9 ± 0.13 2.354 ± 0.313 33
FX Tau B 1990-12-15 CAHA 3.5 m SI K 0.910 ± 0.010 292.0 ± 3.0 0.649 ± 0.020 8, 10
1991-10-18 Palomar/Hale 5.1 m SI K 0.900 ± 0.020 291.0 ± 1.0 0.733 ± 0.001 9
1997-12-07 NASA ITF/NSFCAM SI K 0.890 ± 0.017 289.0 ± 1.0 0.857 ± 0.008 20
1997-12-07 NASA ITF/NSFCAM SI L 0.885 ± 0.017 289.0 ± 1.0 1.182 ± 0.013 20
1999-11-18 Keck I N 0.870 ± 0.020 289.4 ± 0.4 1.098 ± 0.044 26
1999-11-18 Keck I IHW18 0.840 ± 0.020 290.5 ± 0.5 1.114 ± 0.129 26
2001-12-01 Keck I L 0.850 ± 0.020 289.0 ± 1.0 1.050 ± 0.034 26
2006-11-11 CAHA 2.2 m LI Johnson I 0.864 ± 0.075 286.6 ± 4.6 1.625 ± 0.059 40
DK Tau B 1988-10-20 Lick SI K 2.800 ± 0.300 115.0 ± 7.0 1.505 ± 0.435 2
1990-10-08 IRTF O K 2.330 ± 0.050 120.0 ± 2.0 1.300 ± 0.101 7
1997-12-06 NASA ITF/NSFCAM I K 2.304 ± 0.045 117.6 ± 1.2 1.561 ± 0.078 20
1997-12-06 NASA ITF/NSFCAM I L 2.337 ± 0.056 117.6 ± 1.3 1.511 ± 0.036 20
2002-11-13 Keck I SiC 2.270 ± 0.060 117.0 ± 1.0 2.327 ± 0.006 26
2002-11-13 VLT/NACO I NB_1.64 2.354 ± 0.005 119.1 ± 0.2 1.150 ± 0.008 25, 40
2002-11-13 VLT/NACO I NB_2.12 2.350 ± 0.005 119.1 ± 0.1 1.373 ± 0.004 25, 40
2002-11-13 VLT/NACO I NB_2.17 2.350 ± 0.005 119.1 ± 0.1 1.386 ± 0.004 25, 40
2006-11-11 CAHA 2.2 m LI Johnson I 2.358 ± 0.076 118.2 ± 1.9 1.422 ± 0.054 40
2012-11-17 ALMA R 1.3 mm 2.382 ± 0.0474 118.7 ± 0.64 2.555 ± 0.072 34
2012-11-17 ALMA R 850 μm 2.382 ± 0.0474 118.7 ± 0.64 2.659 ± 0.085 34
XZ Tau B 1989-10-17 CAHA 3.5 m SI K 0.300 ± 0.020 154.0 ± 3.0 1.140 ± 0.063 3
1991-10-20 Palomar/Hale 5.1 m SI K 0.310 ± 0.010 151.0 ± 2.0 0.731 ± 0.028 14
1994-01-27 CAHA 3.5 m SI J 0.307 ± 0.004 146.1 ± 0.6 0.447 ± 0.022 19
1994-01-28 CAHA 3.5 m SI K 0.306 ± 0.005 146.8 ± 1.0 0.968 ± 0.027 19
1994-12-19 Palomar/Hale 5.1 m SI K 0.296 ± 0.002 147.0 ± 0.4 – 14
1995-01-05 HST I R 0.306 ± 0.003 147.2 ± 0.5 1.770 ± 0.089 16, 28
1995-11-15 CFHT 3.6 m I K 0.290 ± 0.030 147.0 ± 5.0 0.890 ± 0.121 15
1996-09-29 CAHA 3.5 m SI K 0.299 ± 0.004 145.4 ± 0.3 – 19
1996-11-30 CAHA 3.5 m SI J 0.309 ± 0.010 145.7 ± 0.7 1.373 ± 0.096 19
1996-12-05 NASA ITF/NSFCAM SI K 0.300 ± 0.006 144.5 ± 1.0 0.556 ± 0.040 20
1996-12-05 NASA ITF/NSFCAM SI L 0.299 ± 0.029 142.1 ± 1.1 1.307 ± 0.174 20
1997-03-08 HST I F814W 0.301 ± 0.002 146.4 ± 0.7 2.113 ± 0.012 20
1997-11-19 CAHA 3.5 m SI K 0.302 ± 0.004 140.9 ± 0.5 1.251 ± 0.025 19
1998-03-25 HST I R 0.302 ± 0.009 145.5 ± 0.3 2.590 ± 0.130 18
1998-12-01 HST I R 0.298 ± 0.003 145.5 ± 0.5 2.590 ± 0.130 28
1999-02-03 HST I R 0.301 ± 0.003 144.4 ± 0.5 1.500 ± 0.076 28
2000-02-06 HST I R 0.299 ± 0.003 142.6 ± 0.5 1.020 ± 0.052 28
2000-12-02 HST I Clear 0.299 ± 0.014 142.6 ± 2.0 – 22
2001-02-10 HST I R 0.297 ± 0.003 141.6 ± 0.5 0.500 ± 0.026 28
2002-02-12 HST I R 0.291 ± 0.003 141.6 ± 0.5 2.230 ± 0.112 28
2003-12-13 VLT/NACO I Ks 0.292 ± 0.025 139.3 ± 4.8 1.445 ± 0.001 25, 40
2003-12-13 VLT/NACO I J 0.289 ± 0.086 139.7 ± 16.6 0.911 ± 0.002 25, 40
2004-01-20 HST I R 0.294 ± 0.003 142.3 ± 0.5 2.710 ± 0.136 28
2004-01-22 VLA R 7 mm 0.301 ± 0.006 138.6 ± 0.5 1.505 ± 0.747 29
2006-11-11 CAHA 2.2 m LI Johnson I 0.256 ± 0.100 135.4 ± 20.6 0.935 ± 0.054 40
2006-11-20 VLT/NACO I Ks 0.289 ± 0.005 136.9 ± 0.2 0.618 ± 0.002 25, 40
2012-10-11 VLA R 7 mm 0.282 ± 0.004 129.7 ± 0.1 0.469 ± 0.192 36
2014-02-14 BTA-6 SI I 0.270 ± 0.003 131.5 ± 0.7 – 39
2014-04-11 BTA-6 SI I 0.268 ± 0.004 131.4 ± 0.9 0.370 ± 0.351 39
2014-10-14 ALMA R 2.9 mm 0.273 ± 0.001 128.7 ± 0.5 0.462 ± 0.040 38
HK Tau B 1988-01-15 CTIO I K 2.400 ± 0.100 175.0 ± 2.0 3.070 ± 0.021 4
1997-12-06 NASA ITF/NSFCAM I K 2.342 ± 0.061 170.4 ± 1.1 3.321 ± 0.057 20
1997-12-06 NASA ITF/NSFCAM I L 2.284 ± 0.053 168.8 ± 2.4 3.678 ± 0.114 20
1998-12-17 IRAM R 1.4 mm 2.440 ± 0.050 171.7 ± 1.1 0.582 ± 0.084 21
2001-12-01 Keck I L 2.390 ± 0.100 168.1 ± 2.7 3.516 ± 0.103 26
2002-11-13 Keck I SiC 2.228 ± 0.056 170.3 ± 1.2 3.698 ± 0.172 23
2002-11-19 VLT/NACO I Ks 2.413 ± 0.0605 169.8 ± 1.25 2.442 ± 0.001 25, 40
2002-11-19 VLT/NACO I NB_2.12 2.421 ± 0.0575 170.0 ± 1.15 4.191 ± 0.001 25, 40
2004-02-11 UKIRT/UFTI I L 2.300 ± 0.010 171.4 ± 0.1 3.500 ± 0.051 27
2006-11-11 CAHA 2.2 m LI Johnson I 2.305 ± 0.093 169.3 ± 1.6 3.283 ± 0.057 40
2012-11-17 ALMA R 1.3 mm 2.349 ± 0.036 170.1 ± 0.5 0.811 ± 0.018 34
2012-11-17 ALMA R 850 μm 2.349 ± 0.036 170.1 ± 0.5 0.287 ± 0.040 34
V710 Tau B 1990-11-26 San Pedro Martir/0.9 m I R 3.300 ± 0.066 179.0 ± 1.0 0.120 ± 0.016 12
1991-11-0166 CAHA 3.5 m SI K 3.240 ± 0.100 177.0 ± 1.0 0.202 ± 0.014 10
1997-12-06 NASA ITF/NSFCAM I K 3.168 ± 0.062 176.2 ± 1.1 0.270 ± 0.042 20
1997-12-06 NASA ITF/NSFCAM I L 3.178 ± 0.064 176.5 ± 1.2 0.140 ± 0.042 20
2002-10-22 VLT/NACO I NB_1.64 3.236 ± 0.005 177.8 ± 0.1 0.367 ± 0.051 25, 40
2002-10-22 VLT/NACO I NB_2.12 3.229 ± 0.004 177.8 ± 0.1 0.007 ± 0.072 25, 40
2002-10-22 VLT/NACO I NB_2.17 3.231 ± 0.004 177.7 ± 0.1 0.007 ± 0.161 25, 40
2002-11-12 Keck I SiC 3.060 ± 0.080 178.0 ± 1.0 2.762 ± 0.010 26
2006-11-12 CAHA 2.2 m LI RG830 3.226 ± 0.042 176.7 ± 0.5 0.175 ± 0.054 40
UZ Tau AB 1990-10-08 IRTF O K 0.340 ± 0.060 0.0 ± 8.0 1.100 ± 0.056 7
1990-11-10 Palomar/Hale 5.1 m SI K 0.359 ± 0.002 357.4 ± 0.3 – 14
1994-01-26 CAHA 3.5 m SI J 0.358 ± 0.010 1.3 ± 1.0 0.298 ± 0.101 19
1994-07-24 HST I F814W 0.368 ± 0.001 0.1 ± 0.2 0.292 ± 0.025 20
1994-12-19 Palomar/Hale 5.1 m SI K 0.360 ± 0.003 1.3 ± 0.4 – 14
1996-09-29 CAHA 3.5 m SI K 0.366 ± 0.004 1.3 ± 0.2 0.451 ± 0.033 19
1996-12-06 NASA ITF/NSFCAM SI K 0.360 ± 0.007 0.8 ± 1.0 0.544 ± 0.066 20
1996-12-06 NASA ITF/NSFCAM SI L 0.369 ± 0.007 3.4 ± 1.1 0.800 ± 0.198 20
1999-11-03 HST I Clear 0.369 ± 0.014 3.6 ± 1.6 – 22
1999-11-16 Keck I N 0.370 ± 0.010 3.7 ± 0.6 0.170 ± 0.065 26
1999-11-17 Keck I IHW18 0.370 ± 0.010 2.1 ± 0.9 0.310 ± 0.041 26
2001-12-01 Keck I L 0.350 ± 0.010 4.0 ± 1.0 0.544 ± 0.040 26
2002-11-14 VLT/NACO I NB_1.64 0.369 ± 0.004 6.2 ± 0.6 0.662 ± 0.089 25, 40
2002-11-14 VLT/NACO I NB_2.12 0.368 ± 0.004 5.8 ± 0.5 0.868 ± 0.057 25, 40
2002-11-14 VLT/NACO I NB_2.17 0.368 ± 0.004 5.4 ± 0.5 0.668 ± 0.051 25, 40
2006-11-11 CAHA 2.2 m LI Johnson I 0.355 ± 0.099 5.6 ± 10.2 0.540 ± 0.054 40
2006-12-26 VLT/NACO I Ks 0.369 ± 0.001 8.1 ± 0.2 0.588 ± 0.003 40
2012-09-28 Gemini North AO K 0.375 ± 0.001 11.5 ± 0.1 0.370 ± 0.051 37
UZ Tau AC 1944-04-01 McDonald/2.1 m I Z 3.680 ± 0.046 271.5 ± 0.6 0.275 ± 0.083 1
1988-01-15 CTIO I K 3.600 ± 0.200 274.0 ± 2.0 0.720 ± 0.021 4
1990-10-08 IRTF O K 3.780 ± 0.070 273.0 ± 1.0 1.100 ± 0.056 7
1990-11-26 San Pedro Martir/0.9 m I R 3.500 ± 0.070 275.0 ± 1.0 0.390 ± 0.016 12
1992-12-10 UKIRT I 9.5 μm 3.600 ± 0.100 275.0 ± 2.0 1.659 ± 0.194 13
1994-07-24 HST I F814W 3.539 ± 0.003 273.1 ± 0.1 0.276 ± 0.186 20
1999-11-03 HST I Clear 3.551 ± 0.014 273.2 ± 0.2 – 22
1999-11-16 Keck I N 3.520 ± 0.060 272.9 ± 0.4 2.260 ± 0.120 26
1999-11-17 Keck I IHW18 3.440 ± 0.060 273.0 ± 0.4 2.360 ± 0.149 26
2001-12-01 Keck I K 3.500 ± 0.100 275.0 ± 1.0 0.644 ± 0.048 26
2001-12-01 Keck I L 3.500 ± 0.100 276.0 ± 1.0 0.999 ± 0.035 26
2002-11-14 VLT/NACO I NB_1.64 3.558 ± 0.006 273.4 ± 0.1 1.037 ± 0.024 25, 40
2002-11-14 VLT/NACO I NB_2.12 3.550 ± 0.006 273.5 ± 0.1 1.477 ± 0.009 25, 40
2002-11-14 VLT/NACO I NB_2.17 3.548 ± 0.006 273.5 ± 0.1 1.307 ± 0.009 25, 40
2006-11-11 CAHA 2.2 m LI Johnson I 3.553 ± 0.100 272.5 ± 1.5 0.750 ± 0.054 40
2006-12-26 VLT/NACO I Ks 3.553 ± 0.021 273.3 ± 0.2 1.110 ± 0.001 40
2012-09-28 Gemini North AO K 3.575 ± 0.010 276.8 ± 0.2 0.630 ± 0.041 37
GH Tau B 1991-10-19 Palomar/Hale 5.1 m SI K 0.314 ± 0.006 119.0 ± 2.0 0.638 ± 0.013 9
1991-11-0166 CAHA 3.5 m SI K 0.350 ± 0.010 120.0 ± 1.0 0.102 ± 0.060 10
1994-12-19 Palomar/Hale 5.1 m SI K 0.307 ± 0.002 116.0 ± 0.4 – 14
1996-12-05 NASA ITF/NSFCAM SI K 0.305 ± 0.006 114.8 ± 1.1 0.208 ± 0.079 20
1996-12-05 NASA ITF/NSFCAM SI L 0.312 ± 0.007 115.3 ± 1.6 0.372 ± 0.091 20
1998-12-05 HST I F814W 0.311 ± 0.002 114.6 ± 0.2 0.084 ± 0.009 20
1999-11-17 Keck I N 0.300 ± 0.010 111.0 ± 2.0 0.403 ± 0.038 26
2001-01-22 HST I Clear 0.304 ± 0.014 113.7 ± 2.0 – 22
2006-11-11 CAHA 2.2 m LI Johnson I 0.286 ± 0.112 109.0 ± 21.4 0.378 ± 0.067 40
2006-12-26 VLT/NACO I Ks 0.298 ± 0.019 109.3 ± 1.6 0.088 ± 0.005 40
2008-12-18 Keck II AO K 0.299 ± 0.001 108.5 ± 0.1 0.079 ± 0.010 33
2012-09-28 Gemini North AO K 0.297 ± 0.001 106.3 ± 0.1 0.130 ± 0.011 37
2013-01-28 Keck II AO K 0.295 ± 0.002 106.2 ± 0.3 0.118 ± 0.030 33
HN Tau B 1988-01-15 CTIO I K 3.100 ± 0.100 215.0 ± 2.0 3.430 ± 0.102 4
1990-11-26 San Pedro Martir/0.9 m I R 3.100 ± 0.063 220.0 ± 1.0 3.090 ± 0.016 12
1997-12-06 NASA ITF/NSFCAM I K 3.109 ± 0.082 219.1 ± 1.1 3.721 ± 0.085 20
1997-12-06 NASA ITF/NSFCAM I L 3.150 ± 0.330 219.2 ± 2.5 4.532 ± 0.201 20
2003-02-18 VLT/NACO I NB_2.17 3.136 ± 0.0067 219.9 ± 0.17 3.603 ± 0.001 25, 40
2006-11-12 CAHA 2.2 m LI Johnson I 3.152 ± 0.084 218.8 ± 1.5 2.299 ± 0.056 40
2012-09-28 Gemini North AO K 3.210 ± 0.019 220.0 ± 0.2 3.090 ± 0.051 37
HV Tau C 1990-10-08 IRTF I K 4.000 ± 0.400 45.0 ± 5.0 3.300 ± 0.166 7
1996-08-26 UKIRT I K 3.980 ± 0.030 43.5 ± 0.4 4.220 ± 0.093 17
1996-08-30 UKIRT I N 3.990 ± 0.310 44.0 ± 5.0 0.990 ± 0.432 17
1998-02-14 UKIRT I Brγ 4.030 ± 0.240 45.8 ± 2.0 4.470 ± 0.224 17
2000-03-09 HST I F606W 4.045 ± 0.071 44.1 ± 1.1 2.979 ± 0.020 30, 40
2000-03-09 HST I F814W 4.044 ± 0.071 43.7 ± 1.1 2.095 ± 0.006 30, 40
2001-12-01 Keck I K 4.000 ± 0.200 43.0 ± 1.0 4.663 ± 0.123 26
2001-12-01 Keck I L 3.900 ± 0.200 43.0 ± 1.0 3.903 ± 0.054 26
2002-11-13 Keck I SiC 4.100 ± 0.100 43.0 ± 1.0 0.198 ± 0.010 26
2002-11-24 VLT/NACO I Ks 4.001 ± 0.074 44.1 ± 1.1 4.279 ± 0.001 30, 40
2002-11-24 VLT/NACO I H 3.977 ± 0.085 44.1 ± 1.3 4.985 ± 0.001 30, 40
2002-11-24 VLT/NACO I J 3.987 ± 0.109 44.0 ± 1.6 4.944 ± 0.001 30, 40
2002-12-13 Keck II-NIRC2 I L 4.030 ± 0.010 44.9 ± 0.1 0.689 ± 0.082 30
2002-12-13 Keck II-NIRC2 I Ms 4.070 ± 0.020 44.7 ± 0.2 – 30
2004-12-13 Keck II-NIRC2 I L 4.020 ± 0.010 44.4 ± 0.1 0.573 ± 0.093 30
2006-11-12 CAHA 2.2 m LI Johnson I 4.129 ± 0.036 42.4 ± 0.5 4.089 ± 0.058 40
V999 Tau B 1991-10-27 CAHA 3.5 m SI K 0.300 ± 0.010 243.0 ± 20.0 0.555 ± 0.091 19
1994-01-27 CAHA 3.5 m SI J 0.260 ± 0.004 236.4 ± 0.3 0.848 ± 0.008 19
1994-12-15 CAHA 3.5 m SI K 0.252 ± 0.004 237.5 ± 1.0 0.689 ± 0.035 19
1996-09-28 CAHA 3.5 m SI H 0.239 ± 0.004 240.1 ± 0.7 0.965 ± 0.032 19
1997-11-17 CAHA 3.5 m SI K 0.234 ± 0.004 241.6 ± 0.4 0.831 ± 0.052 19
1997-12-08 NASA ITF/NSFCAM SI L 0.234 ± 0.005 244.8 ± 2.9 0.779 ± 0.101 20
1998-12-13 HST I Clear 0.226 ± 0.014 242.0 ± 3.1 – 22
2006-11-11 CAHA 2.2 m LI Johnson I 0.230 ± 0.043 278.6 ± 6.2 0.222 ± 0.156 40
2006-12-26 VLT/NACO I Ks 0.188 ± 0.004 257.0 ± 0.6 0.487 ± 0.003 40
V1000 Tau B 1990-10-04 Palomar/Hale 5.1 m SI K 0.208 ± 0.002 77.6 ± 0.4 – 14
1991-10-27 CAHA 3.5 m SI K 0.230 ± 0.020 85.0 ± 2.0 0.591 ± 0.057 19
1993-11-25 Palomar/Hale 5.1 m SI K 0.230 ± 0.010 83.0 ± 2.0 – 14
1994-10-18 Palomar/Hale 5.1 m SI K 0.224 ± 0.002 82.7 ± 0.4 – 14
1994-12-12 CAHA 3.5 m SI K 0.228 ± 0.004 83.8 ± 0.3 0.639 ± 0.012 19
1996-09-28 CAHA 3.5 m SI H 0.228 ± 0.004 86.3 ± 0.4 0.630 ± 0.018 19
1996-11-29 CAHA 3.5 m SI J 0.236 ± 0.005 87.4 ± 0.3 0.729 ± 0.056 19
1997-03-08 HST I F814W 0.232 ± 0.003 86.9 ± 0.4 0.375 ± 0.010 20
1997-11-22 CAHA 3.5 m SI K 0.230 ± 0.004 91.0 ± 0.3 0.731 ± 0.426 19
1997-12-08 NASA ITF/NSFCAM SI L 0.238 ± 0.005 90.7 ± 1.3 0.602 ± 0.018 20
2006-11-11 CAHA 2.2 m LI Johnson I 0.151 ± 0.049 73.4 ± 14.1 0.739 ± 0.055 40
2006-12-26 VLT/NACO I Ks 0.241 ± 0.001 100.7 ± 0.2 0.475 ± 0.003 40
2014-12-11 VLT/SPHERE XAO K 0.235 ± 0.018 111.3 ± 2.7 0.592 ± 0.007 40
RW Aur B 1944-04-01 McDonald/2.1 m I Z 1.220 ± 0.056 254.3 ± 0.6 1.500 ± 0.101 1
1990-11-09 Palomar/Hale 5.1 m SI K 1.390 ± 0.030 256.0 ± 1.0 2.258 ± 0.136 9
1991-11-0166 CAHA 3.5 m SI K 1.500 ± 0.010 258.0 ± 1.0 1.596 ± 0.048 10
1994-11-09 HST I F814W 1.417 ± 0.004 255.5 ± 0.1 2.380 ± 0.032 20
1996-12-06 NASA ITF/NSFCAM SI K 1.397 ± 0.026 254.6 ± 1.0 1.566 ± 0.042 20
1996-12-06 NASA ITF/NSFCAM SI L 1.396 ± 0.026 254.5 ± 1.0 1.974 ± 0.043 20
1999-11-16 Keck I N 1.420 ± 0.020 254.6 ± 0.4 2.836 ± 0.005 26
1999-11-16 Keck I IHW18 1.380 ± 0.020 254.7 ± 0.4 2.593 ± 0.046 26
2002-11-17 VLT/NACO I NB_1.64 1.446 ± 0.005 254.8 ± 0.2 2.052 ± 0.003 25, 40
2002-11-17 VLT/NACO I NB_2.12 1.442 ± 0.004 255.0 ± 0.2 1.943 ± 0.003 25, 40
2002-11-17 VLT/NACO I NB_2.17 1.444 ± 0.004 255.1 ± 0.2 1.990 ± 0.003 25, 40
2003-06-01 IRAM R 1.3 mm 1.468 ± 0.056 255.3 ± 0.5 1.812 ± 0.086 24
2006-11-12 CAHA 2.2 m LI RG830 1.455 ± 0.013 253.7 ± 0.4 1.304 ± 0.054 40
2007-06-04 SAO 6 m SI V 1.448 ± 0.005 255.9 ± 0.3 1.880 ± 0.041 31
2007-06-04 SAO 6 m SI I 1.445 ± 0.004 255.9 ± 0.3 1.430 ± 0.021 31
2013-01-12 Chandra X – 1.480 ± 0.010 254.3 ± 0.5 1.175 ± 0.039 35

Notes. The magnitude difference between the two stars are also shown where we had photometric data. For a few epochs, we had no precise observation date available, in those cases we used a period in which the data could have been acquired and use the middle of that period in the calculations. Other notes: We did not include the binary survey by Reipurth & Zinnecker (1993), because their measurements do not cite accurate dates (only a six year long interval) and also does not cite astrometric errors. We have omitted the observation of the UX Tau AC pair by Della Prugna et al. (1992) because they do not give any hint on the actual observation date. We have omitted the observation of FV Tau B by Chen et al. (1990) because they employed lunar occultation and they were only able to determine the separation along the direction of the occultation. We have omitted the observation of V710 Tau, HN Tau and HK Tau by Cohen & Kuhi (1979) because they do not list the uncertainties of their measurements.

(1)

Method: SI: speckle interferometry, LI: lucky imaging, I: imaging, AO: adaptive optics, XAO: extreme adaptive optics, R: radio observations, X: X-ray observations.

(2)

FV Tau B has two data points from 1999-11-17 which do not agree within the uncertainties, therefore we dismissed the measurement that is clearly an outlier.

(3)

We obtained the values of UX Tau AB from the separations and positions angles of UX Tau A-Ba and UX Tau A-Bb as listed in Schaefer et al. (2014) by linearly interpolating the positions using the flux ratio provided for UX Tau Ba-Bb therein.

(4)

We recalculated the 1990-10-08 epoch of DK Tau, because their numbers strongly suggest a coordinate conversion error. We also recalculated the 2012-11-17 epoch of DK Tau, because the quoted separation does not agree with the quoted coordinates.

(5)

We re-analysed these observations using the current NACO pipeline to be able to draw conclusions from a consistently analysed data set.

(6)

These dates are the middle of the time interval 1990-12−1992-10 provided by Leinert et al. (1993) for the time of their observations.

(7)

We opted to re-analyse the original VLT/NACO images using the current NACO pipeline, because the original paper does not feature a magnitude difference measurement, but the companion is actually clearly visible and measurable.

Reference. 1: Joy & van Biesbroeck (1944), 2: Weintraub (1989), 3: Haas et al. (1990), 4: Moneti & Zinnecker (1991), 5: Leinert et al. (1991), 6: Bouvier et al. (1992), 7: Simon et al. (1992), 8: Zinnecker et al. (1992), 9: Ghez et al. (1993), 10: Leinert et al. (1993), 11: Tessier et al. (1994), 12: Hartigan et al. (1994), 13: Ghez et al. (1994), 14: Ghez et al. (1995), 15: Close et al. (1997), 16: Krist et al. (1997), 17: Woitas & Leinert (1998), 18: Krist et al. (1999), 19: Woitas et al. (2001), 20: White & Ghez (2001), 21: Duchêne et al. (2003), 22: Hartigan & Kenyon (2003), 23: McCabe et al. (2003), 24: Cabrit et al. (2006), 25: Correia et al. (2006), 26: McCabe et al. (2006), 27: Connelley et al. (2008), 28: Kristet al. (2008), 29: Carrasco-González et al. (2009), 30: Duchêne et al. (2010), 31: Bisikalo et al. (2012), 32: Torres et al. (2013), 33: Schaefer et al. (2014), 34: Akeson & Jensen (2014), 35: Skinner & Güdel (2014), 36: Forgan et al. (2014), 37: Daemgen et al. (2015), 38: ALMA Partnership et al. (2015), 39: Dodin et al. (2016), 40: this work.

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