**Table 1:** XCOUNT predicted X-ray counts using different stellar birthrates, compared with the observations.
	B	A	F0-F6	F7-G	K	M0-M5	Total	Range $^\dag$
Observed $^\ddag$	1	2	9	9	21	14	56
Constant birthrate ( $\tau = \infty$ )	-	2	3	5	7	14	31	19-43
Slowly decreasing birthrate ( $\tau = 15$ Gyr)	-	2	3	4	6	11	26	15-35
Rapidly decreasing birthrate ( $\tau = 5$ Gyr)	-	2	3	3	5	7	20	12-28
Slowly increasing birthrate ( $\tau = -15$ Gyr)	-	2	3	6	8	18	37	24-51

$^\dag$ Range of total number of stars predicted by the model, for each stellar birthrate. This value has been estimated taking the relative error on the predicted source counts and the statistical uncertainties in the model simulation into account.
$^\ddag$ The two binary systems containing a white dwarf (see Sect. 2) have been discarded for the comparison.

Source LaTeX | All tables | In the text