2006A&A...451..759E

Query : 2006A&A...451..759E

2006A&A...451..759E - Astronomy and Astrophysics, volume 451759-766 (2006/6-1)

COSMOGRAIL: the COSmological MOnitoring of GRAvItational Lenses. III. Redshift of the lensing galaxy in eight gravitationally lensed quasars.

EIGENBROD A., COURBIN F., MEYLAN G., VUISSOZ C. and MAGAIN P.

Abstract (from CDS):

We measure the redshift of the lensing galaxy in eight gravitationally lensed quasars in view of determining the Hubble parameter H0 from the time delay method. Deep VLT/FORS1 spectra of lensed quasars are spatially deconvolved in order to separate the spectrum of the lensing galaxies from the glare of the much brighter quasar images. A new observing strategy is devised. It involves observations in Multi-Object-Spectroscopy (MOS) which allows the simultaneous observation of the target and of several PSF and flux calibration stars. The advantage of this method over traditional long-slit observations is a much more reliable extraction and flux calibration of the spectra. For the first time we measure the redshift of the lensing galaxy in three multiply-imaged quasars: SDSS J1138+0314 (zlens=0.445), SDSS J1226-0006 (zlens=0.517), SDSS J1335+0118 (zlens=0.440), and we give a tentative estimate of the redshift of the lensing galaxy in Q 1355-2257 (zlens=0.701). We confirm four previously measured redshifts: HE 0047-1756 (zlens=0.407), HE 0230-2130 (zlens=0.523), HE 0435-1223 (zlens=0.454) and WFI J2033-4723 (zlens=0.661). In addition, we determine the redshift of the second lensing galaxy in HE 0230-2130 (zlens=0.526). The spectra of all lens galaxies are typical for early-type galaxies, except for the second lensing galaxy in HE 0230-2130 which displays prominent [OII] emission.

Abstract Copyright: ∼

Journal keyword(s): gravitational lensing - cosmological parameters - quasars: general

Nomenclature: Fig.2, text: [ECM2006] HE 0230-2130 GN (Nos G1-G2). Fig.4, text: [ECM2006] SDSS J1138+0314 N=1, [ECM2006] SDSS J1138+0314 A (Nos A-D, G). Fig.5, text: [ECM2006] SDSS J1226-0006 N=1, [ECM2006] SDSS J1226-0006 A (Nos A-B, G).

Simbad objects: 45

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Number of rows : 45
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 [VV2006] J005027.8-174009 QSO 00 50 27.8233690104 -17 40 09.170215068           ~ 50 1
2 [WSC2004] HE 0047-1756 G G 00 50 27.83 -17 40 11.2           ~ 9 1
3 [WSC2004] HE 0047-1756 A LeI 00 50 27.83 -17 40 08.8           ~ 18 0
4 [WSC2004] HE 0047-1756 B LeI 00 50 27.85 -17 40 10.2           ~ 17 0
5 [WCL99] HE 0230-2130 B LeI 02 32 33.02 -21 17 27.8   20.06       ~ 9 0
6 [WCL99] HE 0230-2130 A2 LeI 02 32 33.05 -21 17 26.3   19.27       ~ 8 0
7 [WCL99] HE 0230-2130 D LeI 02 32 33.10 -21 17 27.1   22.02       ~ 9 1
8 [WCL99] HE 0230-2130 A1 LeI 02 32 33.10 -21 17 26.0   19.27       ~ 8 0
9 [WCL99] HE 0230-2130 gLS 02 32 33.10 -21 17 26.0           ~ 9 0
10 [WCL99] HE 0230-2130 C LeI 02 32 33.12 -21 17 28.0   21.87       ~ 9 0
11 [VV2000] J023233.1-211726 QSO 02 32 33.17832 -21 17 25.6308     18.10     ~ 59 1
12 CPD-69 177 WD* 03 10 31.0195960176 -68 36 03.380768388 10.757 11.413 11.394 11.47 11.558 DA3.0 299 0
13 [WSB2002] 0435-1223 C LeQ 04 38 14.73 -12 17 15.0     19.149   19.631 ~ 39 0
14 [WSB2002] 0435-1223 B LeQ 04 38 14.80 -12 17 13.8     19.082   19.623 ~ 43 0
15 [WSB2002] 0435-1223 D LeQ 04 38 14.84 -12 17 16.0     19.196   19.824 ~ 42 0
16 [VV2006] J043814.8-122314 QSO 04 38 14.88 -12 17 14.6     17.15     ~ 245 2
17 [WSB2002] 0435-1223 G G 04 38 14.88 -12 17 14.6     20.80   19.83 ~ 25 0
18 [WSB2002] 0435-1223 A LeQ 04 38 14.90 -12 17 14.4     18.545   19.106 ~ 41 0
19 CD-32 5613 WD* 08 41 32.4290850497 -32 56 32.915823461   12.07 11.85 12.3   DA5.5 325 0
20 [ECM2006] SDSS J1138+0314 C LeI 11 38 03.65 +03 14 58.6           ~ 7 0
21 [ECM2006] SDSS J1138+0314 D LeI 11 38 03.69 +03 14 57.7           ~ 5 0
22 [ECM2006] SDSS J1138+0314 G G 11 38 03.70 +03 14 58.3           ~ 3 1
23 [ECM2006] SDSS J1138+0314 A LeI 11 38 03.73 +03 14 57.8           ~ 6 0
24 [ECM2006] SDSS J1138+0314 B LeI 11 38 03.73 +03 14 58.8           ~ 7 0
25 QSO J1138+0314 QSO 11 38 03.7483141008 +03 14 57.657960780   19.42 19.17     ~ 67 1
26 [ECM2006] SDSS J1226-0006 A LeI 12 26 08.03 -00 06 02.3           ~ 5 0
27 QSO J1226-0006 QSO 12 26 08.0332 -00 06 02.284   19.03 18.54     ~ 53 1
28 [ECM2006] SDSS J1226-0006 G G 12 26 08.06 -00 06 02.3           ~ 3 1
29 [ECM2006] SDSS J1226-0006 B LeI 12 26 08.12 -00 06 02.3           ~ 4 0
30 LBQS 1333+0133 QSO 13 35 34.7884118928 +01 18 05.531756724   18.39 18.17     ~ 62 2
31 [OIC2004] SDSS J1335+0118 G G 13 35 34.79 +01 18 05.5           ~ 4 1
32 [MGW2003] CTQ 327 B LeI 13 55 43 -22 57.4           ~ 9 0
33 [MGW2003] CTQ 327 A LeI 13 55 43 -22 57.4           ~ 10 0
34 [MGW2003] CTQ 327 G G 13 55 43.40 -22 57 23.0           ~ 5 1
35 QSO B1352-2242 QSO 13 55 43.4224 -22 57 23.388   18.2 18.2     ~ 37 1
36 CD-28 11464 Pe* 15 38 59.6479538952 -28 35 36.973634856   12.310 11.797 11.794   A 121 0
37 [MCS2004b] WFI J2033-4723 A1 LeI 20 33 42.08 -47 23 43.4           ~ 15 1
38 [MCS2004b] WFI J2033-4723 C LeI 20 33 42.10 -47 23 45.0           ~ 28 1
39 [VV2006] J203342.1-472343 QSO 20 33 42.12 -47 23 43.9           ~ 135 1
40 [MCS2004b] WFI J2033-4723 G G 20 33 42.138 -47 23 43.70           ~ 18 1
41 [MCS2004b] WFI J2033-4723 A2 LeI 20 33 42.16 -47 23 43.3           ~ 15 1
42 [MCS2004b] WFI J2033-4723 B LeI 20 33 42.30 -47 23 44.6           ~ 28 1
43 [ECM2006] HE 0230-2130 G2 G ~ ~           ~ 4 1
45 [ECM2006] HE 0230-2130 G1 LeI ~ ~           ~ 7 1

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