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Table 1

Observing log.

Stara IAU name α (J2000.0) δ (J2000.0) Date Exp. time [s] S/Nb [pixel-1]

872-13971 J183256.52-344529.3 18:32:56.52 34:45:29.28 Jul-14-2007 3600 50/35/28
899-14135 J183338.54-342940.9 18:33:38.54 34:29:40.91 Jul-08,09-2007 11700 40/25/12
873-17221 J183426.75-345554.4 18:34:26.75 34:55:54.39 Jul-08-2007 4800 50/30/20
874-24995 J183558.75-345839.1 18:35:58.75 34:58:39.14 Jul-10-2007 4800 50/35/25
941-27793 J183113.29-335148.3 18:31:13.29 33:51:48.25 Jul-12-2007 6600 60/40/28
958-10464 J183003.87-333423.6 18:30:03.87 33:34:23.57 Jul-10,11-2007 7060 50/40/30
896-37860 J183025.73-343130.0 18:30:25.73 34:31:30.01 Jul-14-2007 3600 40/35/25

Notes.

(a)

ID consisting of plate number and entry number in our photometric catalogue. Throughout the paper, weuse the second part of this ID as unique identifier of the stars for brevity.

(b)

Given at 6500/4500/4000 Å.

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