All Tables

Table 1: The XMM-Newton/ 2dFGRS correlation sample. Shown from left to right are sample identification number, 2dFGRS database name, right ascension and declination for the X-ray source, offset between X-ray and optical source, $b_{\rm J}$ magnitude from 2dFGRS, X-ray flux, redshift from 2dFGRS, logarithm of X-ray luminosity, logarithmic X-ray-to-optical flux ratio, hardness ratio and error, and, in the last column, suggested galaxy type. For this column, the following abbreviations hold: A: absorption line galaxy; F: featureless 2dFGRS spectrum; G: source appears in group; H II: H II nucleus. A question mark indicates that a classification is not possible. Question marks after a classification indicate a high degree of uncertainty.
Table 2: The Chandra/ 2dFGRS correlation sample. Column details are as in the previous figure.
Table 3: NGs with $\log (f_{\rm X}/f_{\rm O})$ >-2. Groups of rows separated by horizontal lines correspond to the sample indicated in the first column. 2dFGRS stands for the combined correlation samples 2dFGRS- XMM-Newton and 2dFGRS- Chandra. Each row corresponds to the NG type indicated in the second column. Each of the last three columns gives the fraction of NGs with $\log (f_{\rm X}/f_{\rm O})$ >-2 in the $\log L_{\rm X}$ region indicated at the top of the column. Note that the second of these columns includes NGs from the $\log L_{\rm X} < 42$ column which also have $\log L_{\rm X} > 41$ . Thus, the numerator gives the number of NGs of a given type in a given sample and a given $\log L_{\rm X}$ range, and the denominator the total number of NGs in the same sample and $\log L_{\rm X}$ range. Galaxies for which only upper limit information is available have not been taken into account. Empty entries indicate that no NGs of this type have been found. Galaxy labels are as in Tables 1 and 2. Additionally, "sb''rq stands for starburst and "E'' for elliptical.