COSMOS 5921+0638: characterization and analysis of a new strong gravitationally lensed AGN

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Table 1:

Summary of the different imaging data used for this analysis.
Camera	Band	Date	Exp. [s]	Limit [mag]
Suprime	B	2004-02-19	4320	27.3
	V	2004-02-18	3240	26.6
	r+	2004-01-19	2160	26.8
	i+	2004-01-22	2880	26.2
	z+	2004-01-21	4320	25.2
Megacam	$u\star$	2004-2005^(a)	$\sim$ 40 000	26.4
ACS	F814w	2004-04-08	2028	27.1^(b)
WFPC2	F606W	2008-01-07	1200	26.5

The magnitude limits for the COSMOS observations are those shown in Capak et al. (2007) for the ground-based observations and in Koekemoer et al. (2007) for the HST observations. (a) The $u^\star$ frame was created by combining observations taken between the years 2004 and 2005, thus, the total exposure time of the COSMOS field in this band varies. (b) 27.1 is the magnitude limit for a point-like object in the ACS exposure and increases in brightness to 26.1 for a 1 $^{\prime \prime }$ -wide extended object.

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