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Table A.2

Coordinates, magnitude, distance and velocity of the stars in the sample.

ID Gaia ID α (J2000) δ (J2000) b m G d h r gal v GSR Λ B Substructure Comment
[decimal °] [decimal °] [decimal °] [decimal °] [mag] [kpc] [kpc]  km s-1 [decimal °] [decimal °]

HRS-01 612887125855203968 145.722736176 11.064412509 223.454513677 42.974341222 16.282 37.2 42.0 170.9 140.2182 –17.2112 Sag
02 612943888143412096 146.141816105 11.279705430 223.446107779 43.438397170 16.393 16.1 21.4 –22.3 139.8422 –16.9177 Sag
03 3870240041683456000 158.659559972 10.347341776 233.831860702 53.709170985 17.099 23.8 27.6 –91.4 127.2325 –14.7064 Sag
04 3870165687209304192 158.695828606 9.973295653 234.395945105 53.538110317 16.558 70.2 73.4 109.9 127.0807 –15.0523 Sag
#21 UVES 3805383905209904768 165.104636554 1.395482629 252.281919882 52.983728567 16.664
#26 UVES 3682458195986672640 193.727319152 −2.341630089 304.694033858 60.518242433 16.637
05 3688559970125163904 193.960593490 −1.613468534 305.219928945 61.238713105 16.987 65.0 63.2 –34.3 89.2721 –11.2485 Sag
06 3688452286707840640 194.119215967 −2.199181707 305.500614133 60.647434102 17.181 62.0 60.2 123.9 88.8395 –11.6827 clump
07 3724956004027595392 205.560857699 9.019925634 338.848956766 68.273464814 16.446 40.5 38.5 –67.4 84.4498 3.7067 Sag
#28 UVES 3652114389480042880 223.211492264 1.496296732 356.701963111 51.228426070 16.883

MIKE-08 3555759031576592000 163.824823166 −18.508049407 268.066167485 36.380672547 16.921 17.0 19.0 194.5 110.0752 –39.8714 VOD [Fe/H] of clump
but Eu,Mn,Ni off
09 3597524083837476864 182.062459753 −4.416150382 283.001779175 56.775105125 15.667 26.2 26.4 –169.1 98.7544 –19.3433 Sag
10 3688450087681660416 194.035314734 −2.273345489 305.324070376 60.576556987 16.659 33.1 31.8 –142.3 88.8772 –11.7883 Sag
11 3675598136782397824 192.270660520 −7.729364732 301.911128674 55.137716988 15.590 21.4 20.5 217.4 87.6893 –17.4041 VOD
12 3957130734774308736 196.207779183 24.320979562 350.727065501 85.879785221 16.970 11.7 13.7 117.2 99.9986 12.4984
13 3682924973032975744 189.870793093 −2.916219697 296.987047134 59.817468183 15.135 26.4 25.8 188.6 92.2963 –14.3636 VOD clump
14 2435815144861784832 355.468325584 −9.188827808 77.182067445 −65.674537158 16.213 31.5 31.8 –258.0 290.9595 9.8968 clump
15 2436884729157603840 351.627842024 −10.473751039 68.661339153 −63.980925733 15.787 24.0 24.1 –233.4 295.0057 10.2066 clump
16 6880970854429743232 303.805525046 −11.519145229 31.805016791 −23.753969365 15.847 29.2 23.5 –168.7 342.7682 18.9589 Sag
17 1733990241423159936 311.867125660 3.229578126 50.168829709 −23.903942909 16.132 29.5 25.6 –167.3 333.0929 33.3503 clump
18 2720307593796059136 331.814984733 5.764033021 66.378274064 −38.465250833 15.196 23.3 22.1 52.8 309.2599 32.1026 Her-Aqu clump

UVES-19 2583930459319327872 18.041523460 12.998214278 130.729521882 −49.559449053 16.365 55.2 59.0 –158.9 259.7272 19.0744 Sag
20 3261503881461950208 51.549431319 −2.494533042 186.031431352 −45.549794858 15.556 41.7 47.6 –83.3 238.6173 –11.1438 Sag
21 3805383905209904768 165.104636554 1.395482629 252.281919882 52.983728567 16.664 16.3 19.4 –8.9 117.7666 –21.0405 Sag
22 3585463609511300864 176.168096220 −12.897982785 278.781672081 46.819132340 16.595 26.8 27.2 –217.9 100.1554 –29.5518 clump
23 3540980289631278208 172.801776544 −22.909035199 279.841303528 36.339371983 16.413 37.0 36.8 –130.9 97.7173 –39.8698
24 3541034852893925632 172.784730895 −22.767590125 279.756572860 36.464282297 15.999 41.0 40.7 82.1 97.8268 –39.7552
25 3543472882489394304 176.277546542 −19.199845600 282.021491710 40.963207478 16.546 45.9 45.3 –52.8 96.4867 –35.0405 clump
26 3682458195986672640 193.727319152 −2.341630089 304.694033858 60.518242433 16.637 36.7 35.3 165.2 89.1178 –11.9979
27 3576989398518840576 184.185698087 −13.077444623 290.013749161 48.922114525 16.926 11.0 12.1 –23.0 92.2993 –25.9764
28 3652114389480042880 223.211492264 1.496296732 356.701963111 51.228426070 16.883 50.3 45.7 8.3 65.4251 6.1280 Sag

Notes. Column (1): ID; (2)–(6): first release Gaia coordinates and G magnitude; (7)–(9): heliocentric distance, Galactocentric distance and Galactic Standard of Rest velocity; (10), (11) longitude and latitude in a system aligned with the Sag stream; (12) name of the known MW substructure to which the star is possibly associated. The coordinates are given in the International Celestial Reference System (ICRS) and correspond approximately to the equatorial J2000.0 coordinates, while the reference year is 2015. The errors on the equatorial coordinates vary between 0.1 and 30 milliarcseconds (mas), depending on the number of measurements.

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