All Tables

Table 1: Relative astrometry and photometry for $\varepsilon$ Indi Ba and $\varepsilon$ Indi Bb. The image scale in the NACO S27 camera was measuredas $27.07\pm 0.05$ mas/pixel during NACO commissioning using astrometric binaries and Galactic Centre imaging. The system positionangle offset was measured using images taken of the astrometric binary WDS 19043-2132 on August 13 in the same camera configuration: the error in the determination was $\pm$ 0.143 $^{\circ }$ . The separation and position angle were confirmed in independent data taken in another NACO mode, for which the image scale was measured using both WDS 19043-2132 and a non-astronomical opto-mechanical setup. The errors in the mean separation and position angle include the NACO data measurement errors and the errors in the system parameters. Differential magnitudes measured by Volk et al. (2003) and Smith et al. (2003) at other wavelengths are also given for convenience.
Table 2: Astrometry and photometry for the combined $\varepsilon$ Indi Ba,Bb system from the SuperCOSMOS Sky Surveys based on ESO Schmidt (SSS-ESO) and UK Schmidt (SSS-UK) photographic plates (Hambly et al. 2001a,b), the 2MASS Quick Look Atlas (2MQLA; SMLK03), the 2MASS Point Source Catalog (2MPSC; Cutri et al. 2003), the DENIS second data release ( http://vizier.u-strasbg.fr/viz-bin/Cat?B/denis), and a public VLT FORS1 I band acquisition image from another group (Ménard, Delfosse, & Monin; ESO program 72.C-0575(A)).
Table 3: Adopted near-IR magnitudes for the combined $\varepsilon$ Indi Ba,Bb system from the 2MASS Point Source Catalog (Cutri et al. 2003) and the derived individual magnitudes for the two components. The NACO and 2MASS $JHK_{\rm s}$ colour systems are assumed to be identical for this exercise.
Table 4: Proper motions for $\varepsilon$ Indi Ba,Bb and $\varepsilon$ Indi A in mas/yr.
Table 5: Near-IR H band spectral classification indices for $\varepsilon$ Indi Ba and $\varepsilon$ Indi Bb following the schemes of Geballe et al. (2002) and Burgasser et al. (2002).
Table 6: Transformed near-IR magnitudes and colours for the two components of the $\varepsilon$ Indi Ba,Bb system, using the spectral-type based parameterisation of Stephens & Leggett (2004) to transform between the 2MASS and MKO systems, and assuming T1 and T6 for $\varepsilon$ Indi Ba and $\varepsilon$ Indi Bb, respectively.
Table 7: Physical parameters for the two components of the $\varepsilon$ Indi Ba,Bb system derived using the COND models of Baraffe et al. (2003) covering the plausible range of ages (0.8, 1.3, and 2.0 Gyr) for the system (Lachaume et al. 1999; SMLK03). See text for a detailed discussion of the derivation and the errors in the assumptions, as well as the masses derived in similar fashion from the Burrows et al. (1997) models.