Table 3: List of all companions detected within 10 $^{\prime \prime }$ (Ophiuchus) or 30 $^{\prime \prime }$ (Taurus) of our targets. Flux ratios are measured with respect to the brightest component in the K band image, except for three systems where the Class I source is the faintest component in the near-infrared ($\dagger $ symbol). The boldfaced entries represent systems that are likely to be physically bound (see Sect. 3.3). The two companions to IRS 54 listed in italics were detected by combining a short and a long exposure and are not included in our survey. Upper limits for flux ratios are at the 3$\sigma $ level. IRAS 04264+2433 was saturated in all of our images, so only a lower limit for the flux ratio to its companion can be obtained.
Object $\rho$ PA $\Delta J$ $\Delta H$ $\Delta K$ $\Sigma(K\leq K_{\rm B})$ $P_{\rm bound}$
  ( $^{\prime \prime }$) ($^\circ$) (mag) (mag) (mag) (10-4 arcsec-2)  
Taurus ( $0\hbox{$.\!\!^{\prime\prime}$ }8<\rho<30$ $^{\prime \prime }$)
IRAS 04016+2610 23.28 223.5     4.60 $\pm$ 0.05 1.6 0.76
IRAS 04108+2803 B 22.16 237.1     0.17 $\pm$ 0.02 0.4 0.94
- 15.23 274.1     6.00 $\pm$ 0.05 1.2 0.92
IRAS 04113+2758 4.03 152.9 -0.94 $\pm$ 0.03 -0.28 $\pm$ 0.03 0.12 $\pm$ 0.03 0.8 0.99
- 24.80 279.8 2.96 $\pm$ 0.05 3.54 $\pm$ 0.05 3.90 $\pm$ 0.05 1.6 0.73
IRAS 04158+2805 25.45 27.3 -0.44 $\pm$ 0.02 0.05 $\pm$ 0.02 0.94 $\pm$ 0.02 0.8 0.85
- 28.95 246.5 3.86 $\pm$ 0.05 4.23 $\pm$ 0.05 5.08 $\pm$ 0.05 5.3 0.25
IRAS 04181+2654 B 22.22 248.5     4.45 $\pm$ 0.05 2.5 0.68
IRAS 04191+1523 6.09 303.7 >2.05 2.15 $\pm$ 0.05 2.06 $\pm$ 0.03 0.8 0.99
- 28.30 290.0 >2.05 >4.50 4.80 $\pm$ 0.10 6.5 0.20
IRAS 04239+2436 22.12 319.9     4.80 $\pm$ 0.05 1.2 0.83
IRAS 04248+2612 4.55 15.1     4.60 $\pm$ 0.10 3.7 0.98
IRAS 04260+2642 12.30 279.4     5.67 $\pm$ 0.10 9.0 0.65
IRAS 04263+2426 1.27 353.3     1.05 $\pm$ 0.05 0.4 0.99
IRAS 04264+2433 10.93 295.6 >6.1 >6.4 >5.9 2.5 0.91
IRAS 04302+2247 22.64 120.5     3.88 $\pm$ 0.05 5.3 0.43
- 27.27 263.2     4.20 $\pm$ 0.05 7.8 0.16
- 19.34 114.4     4.40 $\pm$ 0.08 8.6 0.37
IRAS 04325+2402 8.15 350.5   2.42 $\pm$ 0.10 2.43 $\pm$ 0.05 1.2 0.98
IRAS 04365+2535 12.48 133.6     6.25 $\pm$ 0.15 5.7 0.76
IRAS 04381+2540 25.92 177.4     6.80 $\pm$ 0.15 5.3 0.33
IRAS 04385+2550 18.90 342.0 2.73 $\pm$ 0.03 2.90 $\pm$ 0.03 3.20 $\pm$ 0.03 0.4 0.96
IRAS 04889+3042 12.32 20.5     4.46 $\pm$ 0.05 2.4 0.89
- 20.67 295.9     6.05 $\pm$ 0.10 6.9 0.40
Ophiuchus ( $0\hbox{$.\!\!^{\prime\prime}$ }8<\rho<10$ $^{\prime \prime }$)
LFAM 1$\dagger $ 9.35 104.9     -4.03 $\pm$ 0.10 1.1 0.97
GY 11 6.20 86.1     0.76 $\pm$ 0.05 3.2 0.96
- 6.73 40.9     2.10 $\pm$ 0.10 4.5 0.94
VSSG 27 1.22 64.3   0.84 $\pm$ 0.10 1.32 $\pm$ 0.05 0.7 0.99
- 5.73 95.7   4.81 $\pm$ 0.15 5.29 $\pm$ 0.05 2.4 0.98
WL 2 4.24 341.1   1.35 $\pm$ 0.03 1.36 $\pm$ 0.02 0.4 0.99
WL 20$\dagger $ 3.66 51.5     -3.13 $\pm$ 0.03 0.2 0.99
- 2.24 351.9     -2.89 $\pm$ 0.03 0.2 0.99
IRS 37 $\dagger $ 8.68 63.7     -1.60 $\pm$ 0.03 0.2 0.99
IRS 43 7.12 321.5     2.98 $\pm$ 0.05 1.3 0.98
IRS 51 1.62 9.0     3.67 $\pm$ 0.05 1.1 0.99
IRS 54 7.17 323.1   5.40 $\pm$ 0.10 5.10 $\pm$ 0.03 1.9 0.97
- 9.01 86.4 >${\it 5.9}$ 7.97 $\pm$ 0.05 ${\it 7.8}$ 0.82
- 7.14 202.4 >${\it 5.9}$ 9.09 $\pm$ 0.10 ${\it 2.0}$ 0.73
IRS 67 2.83 300.0     4.13 $\pm$ 0.10 9.1 0.98
ISO 1632021-245616 7.78 179.8     6.7 $\pm$ 0.2 15. 0.75


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