All Tables

Table 1: List of observed faint cool halo carbon stars. Coordinates $\alpha$ and $\delta$ (J2000) are given in the object names (2MASS Jhhmmss.ss $\pm$ ddmmss.s). l, b are in degrees. The magnitudes B & R are from the USNO-A2.0 as given in the 2MASS catalogue, from the APM database (Irwin 2000) or from the USNO-B1.0 (Monet et al. 2003), with uncertainties of the order of 0.4 mag. The $J H K_{\rm s}$ values are from the 2MASS all-sky point source catalogue, with uncertainties of the order of 0.02-0.03 mag.
Table 2: Adopted template carbon stars used for deriving radial velocities by cross-correlation. Their velocities, noted $v_{\rm helio}$ , are in km s^-1.
Table 3: Data from the USNO-B1.0 database for objects with non-zero proper motions. N is the number of detections on the scanned plates, and Probab. is the total motion probability.
Table 4: Properties of the halo C stars. Quantities l, b, R, $K_{\rm s}$ , $J-K_{\rm s}$ are repeated from Table 2 for information. The colour excess E(B-V) is taken from the maps of Schlegel et al. (1998), in magnitudes, with uncertainty of the order of 0.01 mag. The quantity $M_{K_{\rm s}}$ is the $K_{\rm s}$ -band absolute magnitude derived for each object, and is used to derive the distance to the Sun, d, in kpc. Uncertainties (1 $\sigma$ ) on $M_{K_{\rm s}}$ and d are $\sim$ 0.3 mag and 15%, respectively. Z is the height above or below the galactic plane, in kpc. The measured heliocentric velocity $v_{\rm helio}$ is in km s^-1, with uncertainty of the order of $\sim$ 10 km s^-1 (1 $\sigma$ ). The last column is the same as in Table 1.