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Table 1

Observational dataset.

Star RA [h:m:s] Dec [°:’:”] G [mag] Gbp–rp [mag] DATE-OBS R580 [YYYY-MM-DD] S/N at 670 nm DATE-OBS R860(c) [YYYY-MM-DD] S/N at 900 nm
Ruprecht 106
Ru676 12:38:43.83 −51:09:50.9 15.93 1.44 2002 May 07 80 2017 Feb. 23 65
Ru801 12:38:36.00 −51:09:37.5 16.24 1.34 2002 May 09 60 2017 Feb. 23 80
Ru1614 12:38:36.55 −51:08:25.6 14.10 1.81 2002 May 06 80 2017 Feb. 23 130
Ru1863 12:38:34.75 −51:08:01.9 15.97 1.38 2002 May 08 60 2017 Feb. 23 70
Ru1951 12:38:35.47 −51:07:52.5 14.97 1.56 2002 May 07 90 2017 Feb. 23 80
Ru2004 12:38:40.96 −51:07:46.3 14.27 1.75 2002 May 07 100 2017 Feb. 23 130
Ru2032 12:38:48.93 −51:07:43.2 16.11 1.42 2002 May 08 90 2017 Feb. 23 60

Trumpler 5
1318 6:36:53.4 9:25:34.5 14.59 2.01 2012 Feb. 11 40 2017 Oct. 03 60
2017 Nov. 13 45
2017 Dec. 29 50

3416 6:36:40.2 9:29:47.8 14.42 1.89 2012 Feb. 11(a) 40 2017 Oct. 03 40
2013 Oct. 19(b) 103 2017 Nov. 13 60
2017 Dec. 29 55

3678 6:36:23.8 9:30:28.5 14.31 1.88 2012 Feb. 11 15 2017 Oct. 03 40
2017 Nov. 13 80
2017 Dec. 29 60

4528 6:36:39.8 9:32:18.6 14.38 1.97 2017 Oct 03 50
2017 Nov. 13 60
2017 Dec. 29 55

4791 6:36:33.1 9:33:3.6 14.34 1.92 2017 Oct 03 35
2017 Nov. 13 65
2017 Dec. 29 40

4876 6:36:21.7 9:33:23.1 14.09 1.79 2017 Oct 03 50
2017 Nov. 13 60
2017 Dec. 29 40

Trumpler 20
100292 12:39:04.11 −60:34:00.2 12.98 1.74 2013 Mar. 25 200 2017 Apr. 19 160
340 12:39:15.78 −60:34:40.6 14.25 1.56 2013 Mar. 14 90 2017 Apr. 19 130
542 12:39:12.01 −60:36:32.1 14.28 1.54 2013 Mar. 26 100 2017 Apr. 19 80
591 12:40:04.50 −60:36:56.6 13.09 1.85 2013 Feb. 20 100 2017 Apr. 19 160

Notes. (a)UVES spectrum. (b)MIKE spectrum. (c)Data collected between the nights: 2017 Feb 23, and 2017 Mar 20 for Rup 106; 2017 Apr 19, and 2017 Apr 24 for Tr 20.

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