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Table A.2

Star positions from absolute astrometry and alternate observations used in this study.

Star Calibrator Epoch t α(t) σα*, random δ(t) σδ, random Calibrator α Calibrator δ Ref. Project Network
[Julian date] [h m s] [s] [°′ ″] [″] [h m s] [º ′ ″] code
HD 22468 J0339–0146 2458318.95833 3 36 47.25259 0.000006 0 35 12.9481 0.00008 3 39 30.93778633 -01 46 35.8041892 Titov et al. (2020) V515C LBA
HD 22468 absolute 2457160.00000 3 36 47.2573 0.0008 0 35 13.470 0.004 … … … … … … Titov et al. (2020) AOV003 AOV
HD 22468 absolute 2457582.00000 3 36 47.2562 0.00034 0 35 13.308 0.002 … … … … … … Titov et al. (2020) AUA011 AUA<'>
HD 22468 absolute 2457597.00000 3 36 47.2569 0.00003 0 35 13.269 0.0003 … … … … … … Titov et al. (2020) AOVOIO AOV
EI Eri J0408–0529 2458929.66667 4 9 40.9432071 0.0000007 -7 53 32.068041 0.000039 4 8 59.6499 -5 29 40.538 This work V583A LBA
YY Men J0529–7245 2459044.02083 4 58 17.9152711 0.0000271 -75 16 38.050921 0.000166 5 29 30.0422 -72 45 28.507 This work V583B LBA
YY Men absolute 2448236.00000 4 58 17.94792 0.00029 -75 16 38.0852 0.0136 … … … … … … This work South-12 DSS45-Hobart26
del Lib J1456–0617 2457596.50000 15 0 58.27745 0.000013 -8 31 8.3003 0.00012 14 56 41.39265522 -6 17 43.2039727 Titov et al. (2020) AOVOIO AOV
del Lib J1512–0905 2459044.02083 15 0 58.2602504 0.0000031 -8 31 8.330971 0.000161 15 12 50.5329 -9 5 59.830 This work V583B LBA
HD 142184 absolute 2457875.66760 15 53 55.8473903 0.0000217 -23 58 41.562171 0.000406 … … … … … … This work AUA020 AUA(1)
HD 142184 absolute 2458142.72890 15 53 55.8465556 0.0000466 -23 58 41.580231 0.000314 … … … … … … This work AOV019 AOV
HD 142184 absolute 2458282.74890 15 53 55.8455544 0.0002387 -23 58 41.586771 0.008776 … … … … … … This work 18JUN13XW VLBA
HD 142184 absolute 2458341.44780 15 53 55.8451101 0.0000348 -23 58 41.593428 0.001182 … … … … … … This work UG002O VLBA
HD 142184 absolute 2458473.21000 15 53 55.8456092 0.0000647 -23 58 41.597420 0.003519 … … … … … … This work UG002V VLBA
HD 142184 absolute 2458563.75110 15 53 55.8455989 0.0000405 -23 58 41.608241 0.000496 … … … … … … This work AOVOЗЗ AOV
HD 142184 absolute 2458577.75080 15 53 55.8454197 0.0000353 -23 58 41.610263 0.000351 … … … … … … This work AOVO34 AOV
HD 142184 absolute 2458601.58380 15 53 55.8452023 0.0000334 -23 58 41.610419 0.001328 … … … … … … This work UG003H VLBA
HD 142184 absolute 2458862.46170 15 53 55.8449085 0.0000928 -23 58 41.624139 0.003391 … … … … … … This work UG003T VLBA
HD 142184 absolute 2458872.40590 15 53 55.8448337 0.0000232 -23 58 41.628742 0.000865 … … … … … … This work UG03T1 VLBA
HD 142184 absolute 2458968.72980 15 53 55.8441951 0.0003340 -23 58 41.629517 0.013609 … … … … … … This work AOVO46 AOV">
HD 142184 J1553–2422 2459044.02083 15 53 55.8433673 0.0000022 -23 58 41.638212 0.000133 15 53 31.6278 -24 22 6.036 This work V583B LBA
HD 167971 J1818–1108 2458929.66667 18 18 5.8926205 0.0001457 -12 14 33.308782 0.001516 18 18 19.3166 -11 8 48.329 This work V583A LBA
HD 167971 J1832–1035 2459044.02083 18 18 5.8798553 0.0000224 -12 14 33.360195 0.000321 18 32 20.8364 -10 35 11.200 This work V583B LBA
V479 Sct J1838–1833 2458929.66667 18 26 15.0661506 0.0000003 -14 50 54.408599 0.000022 18 38 37.6916 -18 33 55.260 This work V583A LBA

Notes. The star coordinates α(t) and δ (t) at epoch t and their respective uncertainties σα*,random and σδ,random, information about the observing network as well as the position type (“absolute” in case of absolute geodetic VLBI and a calibrator name in case of phase referencing observations) are reported as collected from the respective references or derived from our work. The original calibrator coordinates “Calibrator α” and “Calibrator δ” taken from the references listed in column 10 are also given. (1)The network was enlarged with additional stations. Details can be found in the IVS master schedules available at https://ivscc.gsfc.nasa.gov/program/master.html.

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