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TABLE 1
SAMPLE OF EUV­SELECTED DA WHITE DWARFS
REJ Other Names V T eff log g M=M fi Refs Notes
0007+331 a GD 2 13.85 45653 7.77 0.57 1,2
0134\Gamma160 a GD 984, PHL 1043 13.96 43722 7.70 0.54 1,2,9 DA+dM
0138+252 PG0136+251 15.87 38964 9.00 1.22 1,1 peculiar
0148\Gamma253 a GD 1401 14.69 25707 7.70 0.50 1,2,6 NS, DA+dM
0235+034 Feige 24 12.56 62947 7.53 0.54 1,1,13 DAe+dM
0237\Gamma122 a PHL 1400 14.92 31570 8.38 0.85 1,2
0348\Gamma005 GD 50 14.04 38881 8.97 1.17 1,2
0350+171 V471Tau 13.65 34200 8.80 1.12 1,1 DA+K0
0427+740 a 15.9 47549 7.84 0.61 3,2 visual pair, 8 00
0443\Gamma034 a 16.9 65140 9.12 1.29 3,4
0457\Gamma280 a MCT 0455\Gamma2812 13.95 50061 7.63 0.53 1,2 NS
0512\Gamma004 a 14.2 31333 7.34 0.45 3,2
0521\Gamma102 a 15.81 32775 8.53 0.94 1,2
0827+288 PG0824+289 14.22 51934 8.00 0.70 1,1,12 DA+dC+M3V
0841+032 a 14.47 37687 7.68 0.52 1,2
0845+488 HD74389B 15.5: 39500 8.04 0.65 7,5 DA+A2V
0902\Gamma040 a 13.19 22285 7.76 0.51 1,2
0907+505 a PG0904+511 16.54 31791 8.04 0.66 1,2
0916\Gamma194 a 17.3 56400 9.12 1.29 3,4 visual pair, 6.4 00
0940+502 a PG0937+506 16.0 35511 7.62 0.51 3,2
0957+852 a 15.4 50205 8.29 0.82 3,2
1016\Gamma052 14.21 53827 8.08 0.65 1,1,4 DA+dM
1019\Gamma140 a 14.93 31100 7.85 0.57 1,2
1029+450 a PG1026+454 16.13 35017 7.64 0.51 1,2
1032+532 a 14.45 42785 7.89 0.62 1,2
1033\Gamma114 G 162\Gamma66, LTT 3870 13.01 23741 7.79 0.52 1,2
1036+460 a GD 123 14.34 28720 7.95 0.61 1,2,10 DA+K
1043+490 a 16.23 40461 7.87 0.60 1,2,14 visual pair, 8 00
1043+445 a PG1040+451 16.94 48000 7.98 0.63 3,4
1044+574 a PG1041+580 14.64 29878 7.73 0.52 1,2
1100+713 a PG1057+719 14.68 40328 7.75 0.55 1,2
1112+240 a Ton 61 15.77 39281 7.71 0.53 1,2
1122+434 a PG1120+439 15.8 26152 8.23 0.75 3,2
1126+183 a PG1123+189 14.13 52747 7.69 0.56 1,2,10 DA+dM
1128\Gamma025 a PG 1125\Gamma026 15.73 30227 8.15 0.71 1,2
1148+183 a PG1145+188 14.33 24717 7.84 0.55 1,2
1235+233 a PG1232+238 17.4 45639 7.77 0.57 3,2
1236+475 a PG1234+482 14.38 55570 7.57 0.53 1,1 reclassified DB
1257+220 a GD 153 13.38 38324 7.71 0.53 2
1316+295 HZ 43 12.99 49000 7.70 0.56 1,8 DA+dM
1336+694 a PG1335+701 15.4 29067 8.27 0.78 3,2
1426+500 13.6 29800 7.98 0.60 3,4,6 DA+MVe
1431+370 a GD 336 15.27 33988 7.86 0.58 1,2
1440+750 a 15.32 42400 8.54 0.96 3,4
1446+632 a 16.4 37340 7.72 0.53 3,2
1

TABLE 1---Continued
REJ Other Names V T eff log g M=M fi Refs Notes
1629+780 a 13.03 39882 7.88 0.61 1,2,11 DA+M4V
1638+350 a PG 1636+351 14.83 34879 7.90 0.61 1,2
1643+411 a PG 1642+414 16.2 28240 8.15 0.71 3,2
1650+403 a 15.83 37698 7.90 0.61 1,2
1659+440 a PG 1658+440 14.62 30510 9.36 1.31 3,5 magnetic DA
1711+664 a 17.10 47994 8.78 1.09 1,2 visual pair, 2.5 00
1726+583 a PG 1725+586 15.45 52413 8.14 0.75 1,2 visual pair, 6.7 00
1800+683 a KUV 18004+6836 14.74 43868 7.74 0.56 1,2
1820+580 a 13.95 43296 7.70 0.54 1,2
1845+682 a KUV 18453+6819 15.5 35599 8.15 0.72 3,2
2116+735 a KUV 21168+7338 15.0 49777 7.65 0.54 3,2
2126+192 IKPeg 6.07 . . . . . . . . . . . . DA+A8m
2207+252 14.58 26129 8.20 0.74 1,2 visual pair, 8.9 00
2312+104 a GD 246 13.09 51950 7.76 0.59 1,2
a New IR photometry presented in this work.
NOTES: NS means not in official sample, but may have optical fits in NGS99 and/or IR data.
Visual pairs within 10 00 and \DeltaR = 3mag are noted with separations.
REFERENCES: First reference is for V mag, 2d for T eff , log g, and M=M fi ; 3d if listed is for
companion's spectral type and/or mass of previously known companion. If a multiple system has
no third reference listed, it has several references available in SIMBAD. (1) ­ Marsh et al. 1997;
(2) ­ NGS99; (3) ­ V from McCook and Sion; (4) ­ Vennes et al. 1997; (5) ­ Schmidt et al. 1992;
(6) ­ FKB 1997; (7) ­ SIMBAD; (8) ­ Napiwotski, R. et al. 1993; (9) ­ Bues & Aslan 1995; (10) ­
Green, Schmidt & Liebert 1986; (11) ­ Catal`an et al. 1995; (12) ­ Green & Margon 1994; (13) ­
Vennes & Thorstensen 1994; (14) ­ Schwartz et al. 1995.
2

TABLE 2
Summary of Observing Runs
ID UT date Standard Stars Standard Stars Conditions
used a References b
KP01 04 Jan 96 FS #6, #10, #19, LHS
254, LHS 325
1,2 Clear or light cirrus.
KP02 05 Jan 96 FS #10, #19, LHS 191,
LHS 2347
1,2 Cirrus, but eventually
very clear.
KP03 06 Jan 96 FS #2, #10, #19, LHS
2502
1,2 Heavy cirrus.
KP04 07 Jan 96 FS #15, #10, #19, LHS
191
1,2 High thin cirrus.
KP05 02 July 96 \Delta \Delta \Delta \Delta \Delta \Delta Cloudy, no data.
KP06 03 July 96 \Delta \Delta \Delta \Delta \Delta \Delta Cloudy, no data.
KP07 04 July 96 \Delta \Delta \Delta \Delta \Delta \Delta Cloudy, no data.
KP08 05 July 96 \Delta \Delta \Delta \Delta \Delta \Delta Cloudy, no data.
KP09 06 July 96 \Delta \Delta \Delta \Delta \Delta \Delta Cloudy, no data.
KP10 29 Oct 96 FS #1,#6, #9, #12, #15,
#29, #31
1 Mostly clear.
KP11 30 Oct 96 FS #1, #10, #14, #29,
GJ 1057, GJ 1002
1,2 Photometric.
KP12 20 Jan 98 \Delta \Delta \Delta \Delta \Delta \Delta Cloudy.
KP13 21 Jan 98 \Delta \Delta \Delta \Delta \Delta \Delta Fog. Telescope closed.
KP14 22 Jan 98 FS #2, #6, #21, #24,
#18, #19
1 Clear.
KP15 09 May 98 FS #21, #23, #24, #27,
#29, #33
1 Clear.
KP16 10 May 98 FS #16, #20, #21, #23,
#35
1 Mostly clear with moder­
ate haze.
KP17 11 May 98 FS #19, #21, #27 1 Hazy
a FS=UKIRT faint star
b STANDARD STAR REFERENCES: (1) ­ Casali & Hawarden 1992; (2) ­ Leggett 1992
3

TABLE 3
Summary of Target Observations
Target Observing Runs Notes a
0007+331 KP02, KP04, KP10
0134\Gamma160 KP02, KP04,
KP10 jn3
0148\Gamma253 KP02, KP03, KP04
0237\Gamma122 KP04,
KP10 kn9
0348\Gamma005 KP01, KP02, KP03, KP04,
KP11 jn3, kn3
0427+740 KP01, KP03, KP04,
KP14 kn9
0443\Gamma034 KP03,
KP11 jn9, kn9
0457\Gamma280 KP03, KP11
0512\Gamma004 KP01, KP03, KP04, KP10,
KP14 jn9, kn9
0521\Gamma102 KP01, KP03,
KP10, jn9, kn9
KP14 kn9
0827+284 KP11
0841+032 KP01, KP10, jn9, kn9
KP14 kn9
0902\Gamma040 KP01, KP04
KP10 kn9
0907+505 KP03, KP04, KP11, KP14, jn9, kn9
KP17 kn18
0916\Gamma194 KP02 jn9, kn9
0940+502 KP01, jn9, kn9
KP15, jc1, kc1
KP16, jc2, jn9, kc2, kn9
KP17 kc9, kn18
0957+852 KP02,
KP14, kn9
KP16, jc2, jn9, kc2, kn9
KP17 kc9, kn9
1019\Gamma140 KP02
1029+450 KP02
1032+532 KP01, KP04,
KP14 kn9
1033\Gamma114 KP01, KP02, KP03, KP04
1036+460 KP02
1040+451 KP15, jc1, jn12, kc1, kn12
KP16, jc2, jn9, kc2, kn9
KP17 kc12
4

TABLE 3---Continued
Target Observing Runs Notes a
1043+490 KP02,
KP14, kn9
KP15, jc1, jn9, kc2, kn9
1044+574 KP02
1100+713 KP02,
KP17 kn15
1112+240 KP16 jc2, jn9, kc2, kn9
1122+434 KP02,
KP16 jc2, kc2, kn9
1126+183 KP01, KP04
1128\Gamma025 KP02,
KP16 jc1, kc1
1148+183 KP01, KP03
1235+233 KP14, kn9
KP16, jc2, jn9, kc3, kn9
KP17, kc12, kn9
1234+482 KP14 kn9
1257+220 KP01, KP02, KP03
1336+694 KP03, KP04,
KP14, kn9
KP16 jc1, jn9, kc2, kn9
1431+370 KP03, KP04
1431+370 KP10, kn9
KP16, kn9,jn9,jc1,kc2
KP17 kn9,kc12
1440+750 KP14,
KP16, jc1, jn9, kc2, kn9
KP17 kc12, kn9
1446+632 KP14,
KP16, jc2, jn9, kc3, kn15
KP17 kc12, kn9
1629+780 KP15 jc1, kc1
1638+350 KP15 jc1, kc1, kn9
1643+411 KP15, jc1, jn9, kc2, kn9
KP16, jc2, jn9, kc3, kn15
KP17 kc12, kn9
1650+403 KP15, jc1, jn9, kc1, kn9
KP16 jc2, jn9, kc2, kn9
1658+441 KP14,
KP15, jc1, jn9, kc1, kn9
KP16, jc2, kn9, kc2, kn9
KP17 kc12, kn9
1711+664 KP15 jc1, jn18, kc1, kn9
1726+583 KP15 jc1, jn9, kc1, kn9
5

TABLE 3---Continued
Target Observing Runs Notes a
1800+683 KP15, jc1, jn9, kc1, kn9
KP16, jc2, jn9, kc2, kn9
KP17, kc12, kn9
1820+580 KP11,
KP15 jc1, jn9, kc1, kn9
1845+682 KP11,
KP15 jc1, jn9, kc1, kn9
2116+735 KP10, KP11,
KP15, jc1, jn9, kc1, kn9
KP16, jc2, jn9, kc3, kn9
KP17 kc12, kn9
2127\Gamma221 KP10 jn9, kn9
2207+252 KP15, jc1, jn9, kc1, kn9
KP17
2312+104 KP02, KP03, KP04
2353\Gamma243 KP10 jn9, kn9
a The number of 10sec co\Gammaadds per exposure in both J and K bands is nominally
6, and the number of dithered exposures is also 6, except as noted in the Notes.
NOTES:
XcY denotes that in the X bandpass the number of co­adds performed per ex­
posure is Y (e.g., jc1 means 1 co­add per exposure in J band).
XnY denotes that in the X bandpass the number of combined dithered exposures
is Y (e.g., kn9 means 9 dithered exposures combined in the K band).
6

TABLE 4
Observed and Predicted Magnitudes and Colors of DA White Dwarf Stars
RE Name J oe J K oe K (J \Gamma K) oe (J \GammaK) M V (V \Gamma K) p J p K p Notes
observed predicted
0007+331 14.62 0.02 14.82 0.07 \Gamma0.21 0.07 9.06 \Gamma0.72 14.33 14.57
0134\Gamma160 12.95 0.01 12.21 0.01 0.74 0.01 9.00 \Gamma0.72 14.43 14.68
0148\Gamma253 12.33 0.01 11.56 0.04 0.76 0.04 9.98 \Gamma0.60 15.08 15.29
0237\Gamma122 15.74 0.06 15.93 0.12 \Gamma0.18 0.14 10.68 \Gamma0.68 15.36 15.60
0348\Gamma005 14.80 0.06 14.66 0.52 0.14 0.52 11.46 \Gamma0.71 14.50 14.75 1
0427+740 15.64 0.03 15.62 0.12 0.02 0.12 9.13 \Gamma0.73 16.38 16.63
0443\Gamma034 17.38 0.05 17.99 0.07 \Gamma0.61 0.08 11.23 \Gamma0.75 16.49 16.75
0457\Gamma280 14.62 0.02 14.80 0.03 \Gamma0.18 0.03 8.69 \Gamma0.73 14.43 14.68
0512\Gamma004 14.43 0.03 14.67 0.01 0.15 0.40 8.81 \Gamma0.67 14.63 14.87
0521\Gamma102 16.76 0.20 17.13 0.13 \Gamma0.37 0.24 10.87 \Gamma0.69 16.26 16.50
0550\Gamma240 16.93 0.10 17.28 0.41 \Gamma0.34 0.42 9.03 \Gamma0.73 17.18 17.43
0841+032 15.17 0.02 15.49 0.01 \Gamma0.33 0.02 9.17 \Gamma0.70 14.93 15.18
0902\Gamma040 13.70 0.01 13.90 0.05 \Gamma0.20 0.05 10.37 \Gamma0.53 13.54 13.72
0907+505 17.16 0.10 17.54 0.64 \Gamma0.39 0.65 10.09 \Gamma0.68 16.98 17.22
0916\Gamma194 13.94 0.02 13.64 0.04 0.36 0.10 11.36 \Gamma0.74 17.78 18.04
0940+502 16.73 0.07 16.97 0.02 \Gamma0.24 0.07 9.14 \Gamma0.70 16.45 16.70
0957+852 16.49 0.08 16.72 0.09 \Gamma0.23 0.12 9.87 \Gamma0.73 15.88 16.13
1019\Gamma140 15.17 0.04 15.45 0.14 \Gamma0.28 0.14 9.82 \Gamma0.67 15.36 15.60
1029+450 16.92 0.09 17.54 0.70 \Gamma0.62 0.71 9.20 \Gamma0.69 16.58 16.82
1032+532 15.38 0.01 15.45 0.11 \Gamma0.07 0.11 9.35 \Gamma0.72 14.92 15.17
1033\Gamma114 14.80 0.06 14.66 0.52 0.14 0.52 10.31 \Gamma0.56 13.38 13.57
1036+460 12.62 0.04 11.89 0.09 0.72 0.10 9.95 \Gamma0.65 14.76 14.99
1043+490 16.86 0.02 16.95 0.22 \Gamma0.10 0.22 8.40 \Gamma0.72 16.71 16.95
1043+445 18.00 0.05 17.48 0.09 0.52 0.11 9.43 \Gamma0.73 17.42 17.67
1044+574 15.32 0.04 15.73 0.17 \Gamma0.42 0.18 9.72 \Gamma0.66 15.06 15.30
1100+713 15.51 0.10 15.78 0.17 \Gamma0.27 0.20 9.19 \Gamma0.71 15.14 15.39
1112+240 16.37 0.21 16.51 0.55 \Gamma0.14 0.59 9.17 \Gamma0.71 16.24 16.48
1122+434 16.12 0.05 16.39 0.34 \Gamma0.27 0.34 10.82 \Gamma0.61 16.20 16.41
1126+183 12.74 0.09 12.04 0.10 0.70 0.14 8.47 \Gamma0.73 14.61 14.86
1128\Gamma025 16.18 0.06 16.48 0.17 \Gamma0.30 0.18 10.38 \Gamma0.67 16.16 16.40
1148+183 14.96 0.06 15.22 0.20 \Gamma0.26 0.20 10.31 \Gamma0.58 14.71 14.91
7

TABLE 4---Continued
RE Name J oe J K oe K (J \Gamma K) oe (J \GammaK) M V (V \Gamma K) p J p K p Notes
observed predicted
1235+233 18.31 0.11 . . . . . . \Gamma2.36 0.28 9.06 \Gamma0.72 17.88 18.12 2
1236+475 14.91 0.06 14.90 0.16 0.01 0.17 8.37 \Gamma0.73 14.86 15.11
1257+220 14.17 0.06 14.43 0.02 \Gamma0.26 0.05 9.21 \Gamma0.71 13.84 14.09
1336+694 15.85 0.02 16.12 0.04 \Gamma0.28 0.04 10.66 \Gamma0.65 15.82 16.05
1431+370 15.97 0.04 16.37 0.16 \Gamma0.40 0.17 9.65 \Gamma0.69 15.72 15.97
1440+750 17.21 0.11 16.64 0.12 0.57 0.16 11.39 \Gamma0.70 15.77 16.02
1446+632 16.77 0.11 17.77 0.07 \Gamma1.00 0.12 9.26 ­0.70 16.86 17.10
1629+780 10.96 0.03 11.19 0.04 \Gamma0.23 0.05 9.42 \Gamma0.71 13.49 13.74
1638+350 15.55 0.11 15.57 0.64 \Gamma0.01 0.64 9.67 \Gamma0.70 15.28 15.53
1643+411 16.86 0.10 17.46 0.05 \Gamma0.61 0.11 10.53 \Gamma0.64 16.62 16.84
1650+403 16.60 0.08 16.86 1.05 \Gamma0.26 1.05 9.54 \Gamma0.71 16.29 16.54
1658+441 15.47 0.10 15.68 0.02 \Gamma0.21 0.10 12.70 \Gamma0.67 15.06 15.29
1711+664 15.02 0.01 14.19 0.18 0.83 0.18 10.84 \Gamma0.73 17.58 17.83
1726+583 16.40 0.26 16.17 1.51 0.23 1.53 9.56 \Gamma0.73 15.93 16.18
1800+683 15.54 0.04 15.87 0.04 \Gamma0.33 0.06 9.06 \Gamma0.72 15.21 15.46
1820+580 14.07 0.04 13.42 0.01 0.65 0.04 9.01 \Gamma0.72 14.42 14.67
1845+682 14.85 0.10 14.37 0.19 0.47 0.22 10.06 \Gamma0.70 15.95 16.20
2116+735 15.54 0.01 15.93 0.06 \Gamma0.39 0.06 8.74 \Gamma0.73 15.48 15.73
2207+252 14.34 0.08 14.06 0.22 0.28 0.23 10.77 \Gamma0.61 14.98 15.19 3
2312+104 13.81 0.04 14.06 0.01 \Gamma0.14 0.75 8.88 \Gamma0.73 13.57 13.82
NOTES: Objects with significant IR excess, are shown in boldface.
1 Faint IR standard star ­ photometry from Casali & Hawarden (1992)
2 Object is barely discernible on K band image; K photometry unreliable.
3 IR photometry known to include nearby optically resolved object at 2.2 00
8

TABLE 5
Derived Properties of Candidate Cool Companions
REJ Name J c K c MKc M Subtype a V b
c Notes
(YD) (OD) (OD)
0134\Gamma160 13.3 12.3 7.4 4.5 3.5 17.4 1
0148\Gamma253 12.4 11.6 6.9 4 3 16.4 1
0427+740 16.4 16.2 9.4 6.5 6 23.5 3
0916\Gamma194 14.0 13.7 7.7 5 4 19.2
1036+460 12.8 12.0 7.6 5 4 17.3 1
1126+183 13.0 12.1 6.5 3.5 2.5 16.6 1
1629+780 11.1 11.3 7.7 5 4 16.6 1
1711+664 15.1 14.2 8.0 5.5 5 20.0 2
1820+580 15.5 13.8 8.9 6 5.5 21.0
1845+682 15.3 14.6 9.2 6.5 6 21.9
a Approximate spectral type from MKc and Leggett (1992) Table 6, for
Young Disk and Old Disk stars.
b Approximate V magnitude of companion assuming Old Disk popula­
tion, from MKc and (V \Gamma K) of Leggett (1992) Table 6.
NOTES: 1) Known binary; see Table 1.
2) IR photometry known to include nearby marginally optically­resolved
object at separation indicated in Table 1.
3) This star is spatially resolved at near­IR wavelengths, with a compan­
ion within ! 2 00 . Some nebulosity (diffuse emission) is also noted nearby.
The more distant companion noted in Table 1 is not included in the IR
photometry.
9