Table 2: List of the sources with spin frequencies and peak separations.
Sources^* $\langle\Delta\nu\rangle(\sigma)^{1}$ $\langle\Delta\nu\rangle/\nu_{\rm s}^{2}$ $\nu_{\rm 2~min}/\nu_{\rm s}^{3}$

(Hz)

Millisecond pulsar

XTE J1807-294 215(5.9) 1.13 1.8

SAX J1808.4-3658 195(4.0)^a 0.49 1.7

Atoll source

4U 1608-52 287(7.2) 0.46 1.3

4U 1636-53 286(9.6) 0.49 1.7

4U 1702-43 333(8.7) 1.01 3.2

4U 1728-34 327(5.8) 0.90 1.6

KS 1731-260 266(8.7) 0.51 2.2

4U 1915-05 338(12.1) 1.25 1.9

**Table 2:** List of the sources with spin frequencies and peak separations.
Sources^*	$\langle\Delta\nu\rangle(\sigma)^{1}$	$\langle\Delta\nu\rangle/\nu_{\rm s}^{2}$	$\nu_{\rm 2~min}/\nu_{\rm s}^{3}$
	(Hz)
Millisecond pulsar
XTE J1807-294	215(5.9)	1.13	1.8
SAX J1808.4-3658	195(4.0)^a	0.49	1.7
Atoll source
4U 1608-52	287(7.2)	0.46	1.3
4U 1636-53	286(9.6)	0.49	1.7
4U 1702-43	333(8.7)	1.01	3.2
4U 1728-34	327(5.8)	0.90	1.6
KS 1731-260	266(8.7)	0.51	2.2
4U 1915-05	338(12.1)	1.25	1.9

$% latex2html id marker 2303 $\textstyle \parbox{9cm}{ { $^{*}$\space Data are ta... ... frequency; $^{a}$\space measured error of the single pair of twin kHz QPOs. }}$$

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