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Table 2

Individual component apparent magnitudes.

Separationa PAa Jb Hb Ksb L′b E Ks − L′
Name [arcsec] [AU] [°] [mag] [mag] [mag] [mag] [mag] [mag]
B 53 0.28 45 235.8 A 10.80   ±    0.03 10.03 ± 0.04 9.87 ± 0.02 9.66 ± 0.01 0.4 ± 0.5 0.03
B 11.96   ±    0.05 11.44 ± 0.06 11.30 ± 0.04 10.83 ± 0.03 0.0 ± 0.5 0.21
CHXR 9C 0.90 144 79.7 A 10.83   ±    0.04 10.01 ± 0.03 9.84 ± 0.06 9.76 ± 0.02 0.7 ± 0.6 −0.11
0.12 19 69.5 Ba 11.15   ±    0.04 10.33 ± 0.03 10.16 ± 0.06 10.08 ± 0.02 0.7 ± 0.6 −0.12
Bb 11.82   ±    0.04 11.06 ± 0.03 10.84 ± 0.06 10.65 ± 0.02 0.5 ± 0.6 0.00
CHXR 15 0.31 50 198.2 A 11.91   ±    0.03 11.30 ± 0.04 10.99 ± 0.02 10.40 ± 0.04 1.0 ± 0.3 0.20
B 12.38   ±    0.04 11.80 ± 0.04 11.53 ± 0.02 11.02 ± 0.05 1.1 ± 0.4 0.12
CHXR 28 1.84 294 117.1 Aa 9.99   ±    0.03 9.03 ± 0.04 8.77 ± 0.02 8.62 ± 0.02 2.0 ± 0.5 −0.05
0.12 20 7.6 Ab 10.44   ±    0.03 9.38 ± 0.04 9.09 ± 0.02 8.81 ± 0.02 2.7 ± 0.5 0.04
B 10.46   ±    0.03 9.44 ± 0.04 9.15 ± 0.02 9.00 ± 0.02 2.5 ± 0.5 0.17
CHXR 47 0.17 27 328.9 A 10.34   ±    0.03 9.42 ± 0.03 8.87 ± 0.03 8.27 ± 0.03 3.6 ± 0.2 0.32
B 10.80   ±    0.04 9.83 ± 0.03 9.35 ± 0.04 8.77 ± 0.03 3.6 ± 0.3 0.29
CHXR 49NE 0.27 43 48.6 A 10.99   ±    0.03 10.22 ± 0.04 10.02 ± 0.02 9.64 ± 0.01 1.4 ± 0.3 0.12
B 11.09   ±    0.03 10.37 ± 0.04 10.15 ± 0.02 9.73 ± 0.01 0.9 ± 0.3 0.14
CHXR 68 4.40 704 212.1 Aa 10.59   ±    0.03 9.89 ± 0.04 9.61 ± 0.02 9.67 ± 0.04 0.4 ± 0.5 −0.22
0.09 15 21.9 Ab 10.74   ±    0.03 10.07 ± 0.04 9.84 ± 0.02 9.71 ± 0.04 0.0 ± 0.5 −0.01
B 11.41   ±    0.03 10.67 ± 0.03 10.40 ± 0.03 10.28 ± 0.03 0.6 ± 0.4 −0.06
CHXR 71 0.56 90 68.5 A 11.55   ±    0.03 10.69 ± 0.04 10.45 ± 0.02 10.24 ± 0.02 1.2 ± 0.5 −0.02
B 13.12   ±    0.03 12.41 ± 0.04 12.06 ± 0.02 11.27 ± 0.03 0.0 ± 0.3 0.53
CHXR 73 1.29 206 234.6 A 12.64   ±    0.35 11.40 ± 0.04 10.94 ± 0.02 (...)c 4.5   ±    2.5 ...
B 17.84   ±    0.37 16.35 ± 0.10 15.47 ± 0.16 ... 6.7   ±    3.1 ...
CHXR 79 0.88 140 211.0 A 11.84   ±    0.04 10.31 ± 0.03 9.32 ± 0.03 8.03 ± 0.03 6.9 ± 0.3 0.76
B 13.84   ±    0.05 12.50 ± 0.04 11.80 ± 0.04 10.87 ± 0.08 5.6 ± 0.4 0.38
Hn 4 0.17 27 295.2 A 11.65   ±    0.03 10.76 ± 0.04 10.45 ± 0.02 10.17 ± 0.01 1.7 ± 0.5 −0.07
B 11.70   ±    0.03 10.77 ± 0.04 10.47 ± 0.02 10.32 ± 0.01 1.9 ± 0.5 −0.17
Hn 21 5.48 876 68.5 Ad 12.09   ±    0.03 11.14 ± 0.04 10.70 ± 0.02 10.18 ± 0.02 3.5 ± 0.3 0.10
Bd 12.90   ±    0.04 12.09 ± 0.04 11.56 ± 0.03 10.77 ± 0.03 1.5 ± 0.3 0.38
ISO 126 0.28 45 228.8 A 12.55   ±    0.03 10.48 ± 0.04 8.87 ± 0.02 6.83 ± 0.02 10.5 ± 0.3 1.87
B 12.70   ±    0.03 11.21 ± 0.05 10.11 ± 0.04 8.33 ± 0.02 4.3 ± 0.2 1.41
T 3 2.21 354 288.4 A 10.97   ±    0.03 9.64 ± 0.02 8.58 ± 0.03 7.12 ± 0.01 4.9 ± 0.2 1.05
B 11.62   ±    0.03 10.86 ± 0.02 10.33 ± 0.03 9.55 ± 0.02 1.2 ± 0.5 0.50
T 6 5.12 819 122.3 A 8.76   ±    0.04 8.23 ± 0.03 7.70 ± 0.05 6.90 ± 0.01 0.0 ± 0.5 0.76
B 12.00   ±    0.08 11.65 ± 0.06 10.95 ± 0.08 10.39 ± 0.02 0.8 ± 0.3 0.26
T 14 2.67 427 299.6 A 9.45   ±    0.02 8.88 ± 0.02 8.48 ± 0.03 7.66 ± 0.01 0.0 ± 0.5 0.72
B ... 15.01   ±    0.36 16.54   ±    4.16 13.01   ±    0.15 ... ...
T 26 4.57 731 201.3 A 7.89   ±    0.03 7.06 ± 0.04 6.45 ± 0.02 sat 0.0   ±    0.5 ...
BaBbe 11.55   ±    0.04 10.75 ± 0.04 10.24 ± 0.03 9.90 ± 0.04 1.8 ± 0.5 0.01
T 27 0.78 125 13.3 A 11.27   ±    0.03 10.48 ± 0.04 10.08 ± 0.02 9.38 ± 0.03 0.9 ± 0.3 0.50
B 11.68 ± 0.03 10.99 ± 0.04 10.77 ± 0.02 10.42 ± 0.04 1.1 ± 0.3 0.08
T 31 0.66 106 182.6 A 9.32 ± 0.03 8.17 ± 0.04 7.38 ± 0.02 6.14 ± 0.02 3.0 ± 0.3 0.98
BaBbe 9.74 ± 0.03 8.83 ± 0.04 8.51 ± 0.02 8.24 ± 0.04 1.8 ± 0.5 0.04
T 33 2.40 384 284.4 A 9.65 ± 0.03 8.01 ± 0.03 6.68 ± 0.02 sat 4.3   ±    0.3 ...
0.11 18 85.6 Ba 10.09 ± 0.03 9.27 ± 0.03 9.07 ± 0.04 (...)f 0.8   ±    0.4 ...
Bb 11.38 ± 0.04 10.56 ± 0.03 10.32 ± 0.07 (...)f 1.0   ±    0.6 ...
T 39 1.25g 200 18.4 A 10.37 ± 0.03 9.67 ± 0.03 9.48 ± 0.03 9.88 ± 0.03 0.0 ± 0.4 −0.59
4.50g 720 69.9 B 10.77 ± 0.03 10.00 ± 0.03 9.83 ± 0.03 10.31 ± 0.03 0.4 ± 0.4 −0.66
C 11.01 ± 0.04 10.29 ± 0.03 10.09 ± 0.04 9.75 ± 0.03 0.2 ± 0.5 0.14
T 41 0.78 125 324.3 A 7.61 ± 0.03 7.35 ± 0.04 7.28 ± 0.02 7.36 ± 0.01 0.0 ± 0.3 −0.03
B 11.25 ± 0.28 10.57 ± 0.13 10.27 ± 0.06 9.93 ± 0.04 0.3 ± 2.5 0.09
T 43 0.78 126 352.0 A 11.56 ± 0.03 10.32 ± 0.03 9.55 ± 0.02 8.64 ± 0.03 5.5 ± 0.3 0.45
B 12.85 ± 0.03 11.75 ± 0.04 11.07 ± 0.02 10.11 ± 0.03 3.6 ± 0.3 0.51
T 45 0.74 119 51.8 A 10.01 ± 0.03 8.93 ± 0.03 8.16 ± 0.03 7.06 ± 0.03 3.2 ± 0.2 0.78
B 11.78 ± 0.03 10.99 ± 0.03 10.59 ± 0.03 10.10 ± 0.04 2.3 ± 0.2 0.11
T 51 1.97 316 161.8 A 9.32 ± 0.03 8.67 ± 0.03 8.28 ± 0.02 7.15 ± 0.03 0.0 ± 0.5 1.03
B 11.39 ± 0.03 10.72 ± 0.03 10.38 ± 0.03 9.66 ± 0.03 0.0 ± 0.5 0.53
T 54 0.24 38 248.0 A 8.65 ± 0.04 8.24 ± 0.03 8.24 ± 0.06 8.19 ± 0.01 0.0 ± 0.5 0.02
B 10.16 ± 0.05 9.66 ± 0.03 9.65 ± 0.06 9.51 ± 0.02 0.0 ± 0.5 0.04

Notes.

(a)

Separation uncertainties are Δsep = 001, ΔPA = 0.5°. Projected separations in au assume a distance to Cha I of 160 pc (Whittet et al. 1997). For hierarchical triples, separations between a wide component and the close pair are given as well as the separation of the close components.

(b)

Uncertainties are statistical errors from the differential photometry. Systematic uncertainties from relative aperture photometry are ~0.1 mag.

(c)

Due to a saturation of the reference star, no calibrated L′photometry could be measured. The magnitude difference is .

(d)

These components are also known as Hn 21 E (primary) and Hn 21 W (secondary).

(e)

These previously known visual binary components could not be resolved with our NACO adaptive optics observations. System photometry is listed.

(f)

These components are not separated in the L′ -band images. The combined photometry returns .

(g)

As no clear hierarchy is visible, sep. and PA of the secondary and tertiary components with respect to the primary are given.

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