Table 4: Spectroscopic observations.
Object Instrument $\lambda$ range [Å] Start time (UT) Exp. time HJD

2MASS J0516288+260738 TWIN 3900-5000, 6000-7090 2002 Feb. 23 21:34 1800 s 2 452 329.411

G191-B2B TWIN 3900-5000, 6000-7090 2002 Feb. 25 18:40 300 s 2 452 331.281

2MASS J0516288+260738 TWIN 3900-5000, 6000-7090 2002 Feb. 25 20:49 1800 s 2 452 331.380

2MASS J0516288+260738 OMEGA-Cass HK: 14 000-25 000 2002 Oct. 27 23:31 24 $\times$ 120 s 2 452 575.484

GD 71 OMEGA-Cass HK: 14000-25000 2002 Oct. 28 02:21 10 $\times$ 120 s 2 452 575.602

2MASS J0516288+260738 OMEGA-Cass JH: 10 000-18 000 2003 Feb. 03 21:49 24 $\times$ 120 s 2 452 674.412

GD 71 OMEGA-Cass JH: 10 000 - 18 000 2003 Feb. 03 23:12 24 $\times$ 120 s 2 452 674.470

**Table 4:** Spectroscopic observations.
Object	Instrument	$\lambda$ range [Å]	Start time (UT)	Exp. time	HJD
2MASS J0516288+260738	TWIN	3900-5000, 6000-7090	2002 Feb. 23	21:34	1800 s	2 452 329.411
G191-B2B	TWIN	3900-5000, 6000-7090	2002 Feb. 25	18:40	300 s	2 452 331.281
2MASS J0516288+260738	TWIN	3900-5000, 6000-7090	2002 Feb. 25	20:49	1800 s	2 452 331.380
2MASS J0516288+260738	OMEGA-Cass	HK: 14 000-25 000	2002 Oct. 27	23:31	24 $\times$ 120 s	2 452 575.484
GD 71	OMEGA-Cass	HK: 14000-25000	2002 Oct. 28	02:21	10 $\times$ 120 s	2 452 575.602
2MASS J0516288+260738	OMEGA-Cass	JH: 10 000-18 000	2003 Feb. 03	21:49	24 $\times$ 120 s	2 452 674.412
GD 71	OMEGA-Cass	JH: 10 000 - 18 000	2003 Feb. 03	23:12	24 $\times$ 120 s	2 452 674.470

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