Table 3: Comparison with previous studies for common BL Lacs.
Object $R_{\rm e}$ M_H(gal) R-H $\Delta$ (R-H)/ $\Delta$ (log r) Ref.

(1) (2) (3) (4) (5) (6)

MS 0158.5+0019 12 -26.0 2.1 -0.22 This work

4.7 -26.3 3.3 -2.0 C03

PKS 2254+074 13 -26.5 2.1 -0.75 This work

32 -25.6 1.8 0.10 K98

MS 0317.0+1834 6.8 -25.5 This work

14 -25.2 Wright et al. (1998)

**Table 3:** Comparison with previous studies for common BL Lacs.
Object	$R_{\rm e}$	M_H(gal)	R-H	$\Delta$ (R-H)/ $\Delta$ (log r)	Ref.
(1)	(2)	(3)	(4)	(5)	(6)
MS 0158.5+0019	12	-26.0	2.1	-0.22	This work
	4.7	-26.3	3.3	-2.0	C03
PKS 2254+074	13	-26.5	2.1	-0.75	This work
	32	-25.6	1.8	0.10	K98
MS 0317.0+1834	6.8	-25.5			This work
	14	-25.2			Wright et al. (1998)

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