**Table 1:** Sample of BD companions to MS stars observed with *Chandra* ACIS-S. The left hand side of the table represents a summary of stellar parameters. The distances are from *Hipparcos*, references for the other parameters are given in brackets. On the right hand side we list X-ray properties derived from the *Chandra* data: X-ray luminosity, ratio of X-ray to bolometric luminosity attributing all X-ray emission to either of the components for unresolved binaries, and median photon energy. The labels "A'', "Q'', and "F'' denote average, quiescent, and flare luminosities.
										[0.5-8 keV]
Name	Sep	PA	Dist	SpT	M	$T_{\rm eff}$	Age	$\log{\frac{L_{\rm bol}}{L_\odot}}$	Ref.		$\log{L_{\rm x}}$	$\log{\frac{L_{\rm x}}{L_{\rm bol}}}$	$\langle E_{\rm ph} \rangle$
	[ $^{\prime\prime}$ ]	[ $^\circ$ ]	[pc]		[ ${M_\odot}$ ]	[K]	[Gyr]				[erg/s]
HR 7329 B	4.097	166.9	47.7	M 7.5	0.020-0.045	2600	0.012	-2.59	(1,2)	A	27.2	-3.8	0.87
Gl 569 Bab	4.89	30.0	9.8				0.2-0.4		(3)	A	26.8		0.85
										Q	25.8		0.67
										F	27.5		0.87
Ba				M 8.5	0.055-0.087	2450		-3.35	(4)	A		-3.2
Bb				M 9	0.034-0.070	2450		-3.58	(4)	A		-3.4
HD 130948 BC	2.64	104.5	17.9				0.3-0.8		(5)	A	<25.6		-
B^*				L4	0.040-0.065	1900		-3.81	(5,6)	A		<-4.2
C^*				L4	0.040-0.065	1900		-3.93	(5,6)	A		<-4.1

References: (1) Guenther et al. (2001), (2) Lowrance et al. (2000), (3) Lane et al. (2001), (4) Zapatero Osorio et al. (2004).
(5) Potter et al. (2002), (6) Goto et al. (2002);
^* Bolometric luminosity estimated from the K band magnitude and the bolometric correction for the K band given by Leggett et al. (2001).

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