Table 1: Details of VLT observations. The provided $\alpha$ and $\delta$ coordinates refer to epoch 2000 as measured in the course of the SPY project (see Koester et al. 2001). Spectral types, $T_{\rm sp}$ , and measured V magnitudes were taken from the catalogue of McCook & Sion (1999).
Target Alias $\alpha$ $\delta$ V HJD $t_{\rm exp}$ n $T_{\rm sp}$

(mag) (+2 452 500) (s)

WD 0135-052 LHS 1270 01 37 59.4 -04 59 45 12.84 108.584 546 4 DA7

WD 0227+050 Feige 22 02 30 16.6 +05 15 51 12.65 137.601 381 6 DA3

169.545 381 6

WD 0310-688 CPD-69 177 03 10 31.0 -68 36 03 11.40 195.536 119 14 DA3

WD 0346-011 GD 50 03 48 50.2 -00 58 31 13.99 137.657 699 4 DA1

174.600 699 4

WD 0446-789 BPM 03523 04 43 46.4 -78 51 50 13.47 109.710 699 4 DA3

168.569 699 4

WD 0612+177 LTT 11818 06 15 19.0 +17 43 48 13.39 109.756 699 4 DA2

172.561 699 4

WD 0631+107 KPD0631+1043 06 33 50.6 +10 41 09 13.82 200.612 699 4 DA2

202.607 699 4

WD 0839-327 CD-32 5613 08 41 32.6 -32 56 35 11.90 108.803 186 10 DA6

WD 0859-039 RE 0902-040 09 02 17.3 -04 07 12 12.40 174.709 289 8 DA2

196.701 289 8

WD 1042-690 BPM 06502 10 44 10.5 -69 18 20 13.09 168.832 426 6 DA3

174.755 426 6

195.783 426 6

WD 1105-048 LP 672-001 11 08 00.0 -05 09 26 12.92 141.838 486 4 DA3

169.791 486 4

WD 2359-434 L 362-81 00 02 10.7 -43 09 55 13.05 83.510 546 4 DA5

108.542 546 4

**Table 1:** Details of VLT observations. The provided $\alpha$ and $\delta$ coordinates refer to epoch 2000 as measured in the course of the SPY project (see Koester et al. 2001). Spectral types, $T_{\rm sp}$ , and measured V magnitudes were taken from the catalogue of McCook & Sion (1999).
Target	Alias	$\alpha$	$\delta$	V	HJD	$t_{\rm exp}$	n	$T_{\rm sp}$
				(mag)	(+2 452 500)	(s)
WD 0135-052	LHS 1270	01 37 59.4	-04 59 45	12.84	108.584	546	4	DA7
WD 0227+050	Feige 22	02 30 16.6	+05 15 51	12.65	137.601	381	6	DA3
					169.545	381	6
WD 0310-688	CPD-69 177	03 10 31.0	-68 36 03	11.40	195.536	119	14	DA3
WD 0346-011	GD 50	03 48 50.2	-00 58 31	13.99	137.657	699	4	DA1
					174.600	699	4
WD 0446-789	BPM 03523	04 43 46.4	-78 51 50	13.47	109.710	699	4	DA3
					168.569	699	4
WD 0612+177	LTT 11818	06 15 19.0	+17 43 48	13.39	109.756	699	4	DA2
					172.561	699	4
WD 0631+107	KPD0631+1043	06 33 50.6	+10 41 09	13.82	200.612	699	4	DA2
					202.607	699	4
WD 0839-327	CD-32 5613	08 41 32.6	-32 56 35	11.90	108.803	186	10	DA6
WD 0859-039	RE 0902-040	09 02 17.3	-04 07 12	12.40	174.709	289	8	DA2
					196.701	289	8
WD 1042-690	BPM 06502	10 44 10.5	-69 18 20	13.09	168.832	426	6	DA3
					174.755	426	6
					195.783	426	6
WD 1105-048	LP 672-001	11 08 00.0	-05 09 26	12.92	141.838	486	4	DA3
					169.791	486	4
WD 2359-434	L 362-81	00 02 10.7	-43 09 55	13.05	83.510	546	4	DA5
					108.542	546	4

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