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Table A.1.

Estimated uncertainties of mass measurements using astrometric microlensing with Gaia for single events that have an epoch of the closest approach during the nominal Gaia mission.

# Name-lens DR2_ID-lens DR2_ID-source TCA Min σM10 σM10/Min σM5
Jyear M M M
1 HD 22399 488099359330834432 488099363630877824* 2013.711 1.3 47%
2 HD 177758 4198685678421509376 4198685678400752128* 2013.812 1.1 36%
3 L 820-19 5736464668224470400 5736464668223622784* 2014.419 0.28 21%
4 2081388160068434048 2081388160059813120* 2014.526 0.82 47%
5 478978296199510912 478978296204261248 2014.692 0.65 36%
6 G 123-61B 1543076475514008064 1543076471216523008* 2014.763 0.26 37%
7 L 601-78 5600272625752039296 5600272629670698880* 2014.783 0.21 19%
8 UCAC3 27-74415 6368299918479525632 6368299918477801728* 2015.284 0.36 13%
9 BD+00 5017 2646280705713202816 2646280710008284416* 2015.471 0.58 30%
10 G 123-61A 1543076475509704192 1543076471216523008* 2016.311 0.32 24%
11 EC 19249-7343 6415630939116638464 6415630939119055872* 2016.650 0.26 38%
12 5312099874809857024 5312099870497937152 2016.731 0.07 12%
13 PM J08503-5848 5302618648583292800 5302618648591015808 2017.204 0.65 26%
14 5334619419176460928 5334619414818244992 2017.258 0.65 35%
15 Proxima Cen 5853498713160606720 5853498708818460032 2017.392 0.12 29%
16 Innes’ star 5339892367683264384 5339892367683265408 2017.693 0.33 48%
17 L 51-47 4687511776265158400 4687511780573305984 2018.069 0.28 12%
18 4970215770740383616 4970215770743066240 2018.098 0.65 12%
19 BD-06 855 3202470247468181632 3202470247468181760* 2018.106 0.8 46%
20 G 217-32 429297924157113856 429297859741477888* 2018.134 0.23 7.5%
21 5865259639247544448 5865259639247544064* 2018.142 0.8 6.6%
22 HD 146868 1625058605098521600 1625058605097111168* 2018.183 0.92 6.5%
23 Ross 733 4516199240734836608 4516199313402714368 2018.282 0.43 15%
24 LP 859-51 6213824650812054528 6213824650808938880* 2018.359 0.43 43%
25 L 230-188 4780100658292046592 4780100653995447552 2018.450 0.15 49%
26 HD 149192 5930568598406530048 5930568568425533440* 2018.718 0.67 6.3%
27 HD 85228 5309386791195469824 5309386795502307968* 2018.751 0.82 5.1%
28 HD 155918 5801950515627094400 5801950515623081728* 2018.773 1 13%
29 HD 77006 1015799283499485440 1015799283498355584* 2018.796 1 41%
30 Proxima Cen 5853498713160606720 5853498713181091840 2018.819 0.12 16%
31 HD 2404 2315857227976341504 2315857227975556736* 2019.045 0.84 22%
32 LP 350-66 2790883634570755968 2790883634570196608* 2019.299 0.32 46%
33 HD 110833 1568219729458240128 1568219729456499584* 2019.360 0.78 7.2%

Notes. The table lists the name (Name-Lens) and Gaia DR2 source ID (DR2_ID-Lens) of the lens and the source ID of the background sources (DR2_ID-source). An asterisk indicates that Gaia DR2 only provides the position of the sources. In addition, the table lists the epoch of the closest approach (TCA) and the assumed mass of the lens (Min). The expected precision arising from the use of data from the extended ten-year mission is given in (σM10), including the uncertainty due to the errors in the input parameters, and as a percentage (σM10/Min). The expected precision arising from the use of data from the nominal five-year mission is given in (σM5) if it is below 100% of the input mass.

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