Exploring the inner region of type 1 AGNs with the Keck interferometer

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Table 1:

Properties of our targets and summary of the results of our KI observations on 15 May 2009 (UT).
Name	z^a	Scale^b	E_B-V^c	B_p^d	PA	V^2e	$R_{\rm ring}$ ^f		$R_{\rm\tau_K}$ ^g	A_V
	corr.	(pc mas^-1)	(mag)	(m)	( $^\circ$ )		(mas)	(pc)	(pc)	(mag)
NGC 4151	0.00414	0.086	0.028	85.0	12.3	0.862 $\pm$ 0.018	0.45 $\pm$ 0.04	0.039 $\pm$ 0.003	$\sim$ 0.044 $\pm$ 0.011
NGC 4051	0.00309	0.064	0.013	79.4	41.9	0.861 $\pm$ 0.026	0.51 $\pm$ 0.05	0.032 $\pm$ 0.003	$\sim$ 0.011 $\pm$ 0.004
MRK231	0.0427	0.84	0.010	74.4	44.3	0.923 $\pm$ 0.028	0.38 $\pm$ 0.07	0.32 $\pm$ 0.06		1.3^h
IRAS 13349+2438	0.109	2.0	0.012	85.0	34.5	0.869 $\pm$ 0.016	0.44 $\pm$ 0.03	0.88 $\pm$ 0.05		0.93ⁱ

^a CMB corrected value from NED. ^b H₀=70 km s^-1 Mpc^-1, $\Omega_{\rm m}=0.3$ , and $\Omega_{\Lambda}=0.7$ . ^c Galactic reddening from Schlegel et al. (1998). ^d Projected baseline lengths. ^e For objects with multiple measurements, V² data shown are at the longest baseline length, except for NGC 4051 where the one with a smaller error is shown. ^f Thin-ring radius (best-fit values if multiple data are available). ^g Mean and standard deviation of the reverberation measurements from 2001 to 2006 by Koshida et al. (2009) for NGC 4151, and from 2001 to 2003 by Suganuma et al. (2006) for NGC 4051. ^h Lacy et al. (1982). ⁱ Wills et al. (1992).

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