Table A1.
Characteristics of the nine microlensing events ME1-ME9 caused by the white dwarf lens star LAWD 37.
| Name | LAWD 37 | ME1 | ME2 | ME3 | ME4 | ME5 |
|---|---|---|---|---|---|---|
| GDR2 Source ID | 5332606522595645952 | 5332606556930416896 | 5332606552624953344 | 5332606346466523008 | 5332606350796955904 | 5332606350775722752 |
| αref (deg±mas) | 176.4557771399±0.031 | 176.4523022357±0.399 | 176.4538556773±0.118 | 176.4594170339±0.103 | 176.4636014416±0.206 | 176.4677633522±2.252 |
| δref (deg±mas) | −64.8430049999±0.033 | −64.8407666948±0.358 | −64.8408845446±0.115 | −64.8411595678±0.107 | −64.8432980750±0.200 | −64.8420809356±2.134 |
| μα* (mas yr−1) | 2661.594(57) | −4.88(103) | −5.30(21) | −7.08(19) | −8.62(37) | – |
| μδ (mas yr−1) | −344.847(59) | 0.08(71) | 1.90(20) | −0.39(19) | 0.35(35) | – |
| ϖ (mas) | 215.766(41) | −0.64(49) | −0.06(13) | 0.19(12) | 0.42(25) | – |
| G (mag) | 11.4318(4) | 19.657(5) | 17.7332(11) | 17.5213(10) | 18.6055(22) | 20.946(14) |
| GBP (mag) | 11.5072(43) | 20.437(185) | 18.9103(551) | 18.3276(274) | 19.1711(603) | 20.806(344) |
| GRP (mag) | 11.2352(9) | 18.603(58) | 16.5118(75) | 16.5718(88) | 17.5823(226) | 19.237(111) |
| M (M⊙) | 0.78 | – | – | – | – | – |
| θE (mas) | – | 37.06(4) | 37.01(1) | 36.99(1) | 36.97(2) | 37.01(1) |
| u0 (θE) | – | 217.50(25) | 193.97(7) | 194.71(6) | 9.95(5) | 149.43(7) |
| u0 (mas) | – | 8061.4(9) | 7179.4(3) | 7202.9(3) | 368.1(16) | 5530.3(24) |
| t0 (Julian year) | – | 2014.56126a | 2014.62854(7) | 2016.81259(7) | 2019.86776(34) | 2021.80698(14) |
| Δθ2 (mas) | – | 0.133(2) | 0.151(2) | 0.137(2) | 3.600(18) | 0.183(2) |
| T [Δθ2] (d) | – | 955.3(5) | 1127.5(1) | 2176.8(2) | 122.2(6) | 1852.3(4) |
| Name | LAWD 37 | ME6 | ME7 | ME8 | ME9 | |
| GDR2 Source ID | 5332606522595645952 | 5332606350796954240 | 5332606346480229376 | 5332606350771989376 | 5332606350774673536 | |
| αref (deg±mas) | 176.4557771399±0.031 | 176.4683954533±0.192 | 176.4697738660±0.237 | 176.4778826854±0.239 | 176.4787869637±1.680 | |
| δref (deg±mas) | −64.8430049999±0.033 | −64.8452675511±0.208 | −64.8428841195±0.205 | −64.8454278721±0.225 | −64.8439211575±1.690 | |
| μα* (mas yr−1) | 2661.594(57) | −6.40(35) | −4.50(42) | −4.99(49) | – | |
| μδ (mas yr−1) | −344.847(59) | 1.14(35) | 1.92(35) | 1.30(46) | – | |
| ϖ (mas) | 215.766(41) | 0.35(23) | 0.12(26) | 0.11(26) | – | |
| G (mag) | 11.4318(4) | 18.4416(21) | 18.7246(23) | 18.8851(26) | 20.810(17) | |
| GBP (mag) | 11.5072(43) | – | 19.3772(696) | 19.5095(709) | 20.283(129) | |
| GRP (mag) | 11.2352(9) | – | 17.7848(156) | 17.9280(191) | 19.530(124) | |
| M (M⊙) | 0.78 | – | – | – | – | |
| θE (mas) | – | 36.98(2) | 37.00(2) | 37.00(2) | 37.01(1) | |
| u0 (θE) | – | 146.81(9) | 83.49(10) | 182.21(17) | 161.22(5) | |
| u0 (mas) | – | 5428.7(26) | 3089.2(29) | 6741.8(53) | 5966.4(18) | |
| t0 (Julian year) | – | 2023.21348(8) | 2023.63689(62) | 2026.56126b | 2026.56126b | |
| Δθ2 (mas) | – | 0.194(2) | 0.386(4) | 0.167(3) | 0.194(2) | |
| T [Δθ2] (d) | – | 1830.4(6) | 1193.4(7) | 738.8(5) | 639.4(1) |
Notes. Most quantities have already been defined in the text. Δθ2 is the difference between the minimum and maximum values of θ2 for an event over the 12-yr baseline of an extended Gaia mission. T [Δθ2] is the amount of time that an event spends with θ2 > min{θ2} + Δθ2/2. The numbers in parentheses indicate the uncertainty on the last digit.
Event peaks before this date and the event properties are only computed using the time period considered in this paper.
Event peaks after this date. For event properties computed from a more appropriate time period, see Bramich & Nielsen (2018).
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