Table 1: Estimation of the halo WD density based on the objects selected from the OHDHS sample.
Confid.
$\psi (V_{\alpha },V_{\delta })$ $h(V_{\alpha },V_{\delta })$ $t(V_{\alpha },V_{\delta }\vert r)$

level WDs $\rho_{\rm WD}$ ( $M_{\odot}$ pc^-3) WDs $\rho_{\rm WD}$ ( $M_{\odot}$ pc^-3) WDs $\rho_{\rm WD}$ ( $M_{\odot}$ pc^-3)

99% 14 $(2.0\pm 0.9)\times10^{-5}$ 10 $(1.6\pm 0.8)\times10^{-5}$ 10 $(1.5\pm0.8)\times10^{-5}$

95% 20 $(3.1\pm 1.0)\times10^{-5}$ 12 $(1.9\pm 0.9)\times10^{-5}$ 13 $(2.0\pm 0.9)\times10^{-5}$

**Table 1:** Estimation of the halo WD density based on the objects selected from the OHDHS sample.
Confid.	$\psi (V_{\alpha },V_{\delta })$	$h(V_{\alpha },V_{\delta })$	$t(V_{\alpha },V_{\delta }\vert r)$
level	WDs	$\rho_{\rm WD}$ ( $M_{\odot}$ pc^-3)	WDs	$\rho_{\rm WD}$ ( $M_{\odot}$ pc^-3)	WDs	$\rho_{\rm WD}$ ( $M_{\odot}$ pc^-3)
99%	14	$(2.0\pm 0.9)\times10^{-5}$	10	$(1.6\pm 0.8)\times10^{-5}$	10	$(1.5\pm0.8)\times10^{-5}$
95%	20	$(3.1\pm 1.0)\times10^{-5}$	12	$(1.9\pm 0.9)\times10^{-5}$	13	$(2.0\pm 0.9)\times10^{-5}$

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