All Tables

Table 1: Chandra observations of the CrA star-forming region used in this study.
Table 2: Identification of Chandra X-ray sources with optical or infrared counterparts in the CrA star-forming region. Columns 2-4 provide information on counterparts to the X-ray sources in the optical DSS images, the 2MASS images, and the Spitzer images: "y'' means that a counterpart exists, "n'' means that no counterpart can be seen. Column 5 gives the SED class derived from the Spitzer photometry, and the last 3 columns give names, spectral types, and stellar bolometric luminosities of the stars collected from Casey et al. (1998); Olofsson et al. (1999); Walter et al. (1997); Neuhäuser et al. (2000); Wilking et al. (1992); Prato et al. (2003); Nisini et al. (2005); additional references are given in the discussion of the individual objects in Sects. 3 and 4.
Table 3: Results for the brown dwarf candidates (see Sect. 4.2.5).
Table A.1: Complete source list with parameters determined by acis_extract for the energy range of 0.5-8 keV, i.e., net (background-subtracted) counts, median photon energy, source significance, hardness ratios, as well as estimates of the observed flux. Also given are the ratio of the summed exposure map values at the source position relative to the maximum value, i.e., information on the effective exposure time, and the number of observations in which a source was detected ( $N_{\rm obs}$ ). This number can be lower than eight in the outer parts of the map. The manually added source is marked by an asterisk.
Table A.2: X-ray spectral fitting results for one- and two-temperature models. The fitting parameters are the absorbing hydrogen column density $N_{\rm H}$ , the plasma temperatures T, and the normalization factors from XSPEC (defined as $10^{-14}/(4 \pi D^2) \int n_{\rm e} n_{\rm H} {\rm d}V$ ). We also list the extinction-corrected (unabsorbed) X-ray luminosity $L_{\rm X}$ (integrated over the 0.2-8 keV band) derived from the model parameters, the goodness-of-fit measure $\chi ^2_{\rm red}$ , and the number of degrees of freedom (DOF). The fitting parameters for R CrA are given in the text.