2010A&A...522A..95C


C.D.S. - SIMBAD4 rel 1.7 - 2019.10.19CEST15:51:54

2010A&A...522A..95C - Astronomy and Astrophysics, volume 522, A95-95 (2010/11-1)

COSMOGRAIL: the COSmological MOnitoring of GRAvItational lenses. VIII. Deconvolution of high resolution near-IR images and simple mass models for 7 gravitationally lensed quasars.

CHANTRY V., SLUSE D. and MAGAIN P.

Abstract (from CDS):

We attempt to place very accurate positional constraints on seven gravitationally lensed quasars currently being monitored by the COSMOGRAIL collaboration, and shape parameters for the light distribution of the lensing galaxy. We attempt to determine simple mass models that reproduce the observed configuration and predict time delays. We finally test, for the quads, whether there is evidence of astrometric perturbations produced by substructures in the lensing galaxy, which may preclude a good fit with the simple models. We apply the iterative MCS deconvolution method to near-IR HST archival data of seven gravitationally lensed quasars. This deconvolution method allows us to differentiate the contributions of the point sources from those of extended structures such as Einstein rings. This method leads to an accuracy of 1-2mas in the relative positions of the sources and lens. The limiting factor of the method is the uncertainty in the instrumental geometric distortions. We then compute mass models of the lensing galaxy using state-of-the-art modeling techniques. We determine the relative positions of the lensed images and lens shape parameters of seven lensed quasars: HE 0047-1756, RX J1131-1231, SDSS J1138+0314, SDSS J1155+6346, SDSS J1226-0006, WFI J2026-4536, and HS 2209+1914. The lensed image positions are derived with 1-2mas accuracy. Isothermal and de Vaucouleurs mass models are calculated for the whole sample. The effect of the lens environment on the lens mass models is taken into account with a shear term. Doubly imaged quasars are equally well fitted by each of these models. A large amount of shear is necessary to reproduce SDSS J1155+6346 and SDSS J1226-006. In the latter case, we identify a nearby galaxy as the dominant source of shear. The quadruply imaged quasar SDSS J1138+0314 is reproduced well by simple lens models, which is not the case for the two other quads, RX J1131-1231 and WFI J2026-4536. This might be the signature of astrometric perturbations caused by massive substructures in the galaxy, which are unaccounted for by the models. Other possible explanations are also presented.

Abstract Copyright:

Journal keyword(s): gravitational lensing: strong - techniques: image processing - astrometry - quasars: general - cosmology: observations

Nomenclature: Table 2: [CSM2010] HS 2209+1914, [CSM2010] HS 2209+1914 A (Nos A-B, G).

Status in Simbad:  being processed

Simbad objects: 52

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Number of rows : 52

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2019
#notes
1 [VV2006] J005027.8-174009 QSO 00 50 27.8 -17 40 09     16.98     ~ 35 1
2 [WSC2004] HE 0047-1756 gLS 00 50 27.83 -17 40 11.2           ~ 5 0
3 [WSC2004] HE 0047-1756 G G 00 50 27.83 -17 40 11.2           ~ 8 1
4 [WSC2004] HE 0047-1756 A LeI 00 50 27.83 -17 40 08.8           ~ 12 0
5 [WSC2004] HE 0047-1756 B LeI 00 50 27.85 -17 40 10.2           ~ 12 0
6 CLASS B0128+437 Rad 01 31 +44.0           ~ 51 0
7 QSO B0218+357 QSO 02 21 05.5 +35 56 14   20.0 20.0 19.60   ~ 488 3
8 4C 05.19 QSO 04 14 37.76781859 +05 34 42.3354282   24.100 23.800 21.270   ~ 321 2
9 [VV2006] J043814.8-122314 QSO 04 38 14.88 -12 17 14.6     17.15     ~ 153 2
10 QSO B0712+472 QSO 07 16 03.65 +47 08 50.6     23.0     ~ 103 1
11 QSO J0924+0219 QSO 09 24 55.8048 +02 19 24.850   18.58 18.36     ~ 104 1
12 QSO B1115+080A QSO 11 18 16.951 +07 45 58.23   16.61 16.44     ~ 603 2
13 [SSC2003] D LeQ 11 31 51.32 -12 31 57.8           ~ 30 0
14 [SSC2003] C LeQ 11 31 51.50 -12 31 59.8           ~ 32 0
15 [SSC2003] G G 11 31 51.51 -12 31 58.4           ~ 28 1
16 QSO J1131-1231 QSO 11 31 51.5387 -12 31 58.716           ~ 187 1
17 [SSC2003] A LeQ 11 31 51.54 -12 31 58.7           ~ 32 0
18 [SSC2003] B LeQ 11 31 51.54 -12 31 57.5           ~ 31 0
19 [ECM2006] SDSS J1138+0314 C LeI 11 38 03.65 +03 14 58.6           ~ 5 0
20 [ECM2006] SDSS J1138+0314 D LeI 11 38 03.69 +03 14 57.7           ~ 4 0
21 [ECM2006] SDSS J1138+0314 gLS 11 38 03.70 +03 14 58.3           ~ 3 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           ~ 4 0
24 [ECM2006] SDSS J1138+0314 B LeI 11 38 03.73 +03 14 58.8           ~ 5 0
25 QSO J1138+0314 QSO 11 38 03.7479119406 +03 14 57.836414453   19.42 19.17     ~ 49 1
26 [PEI2004] QSO B LeI 11 55 17.085 +63 46 21.59           ~ 4 1
27 [PEI2004] SDSS J1155+6346 gLS 11 55 17.3 +63 46 22           ~ 11 0
28 [PEI2004] Galaxy G 11 55 17.3 +63 46 22           ~ 3 1
29 [VV2006] J115517.3+634622 QSO 11 55 17.3177 +63 46 22.074   19.31 18.66     ~ 27 1
30 [PEI2004] QSO A LeI 11 55 17.35 +63 46 22.0           ~ 4 1
31 [ECM2006] SDSS J1226-0006 gLS 12 26 08.020 -00 06 02.19           ~ 4 0
32 [ECM2006] SDSS J1226-0006 A LeI 12 26 08.03 -00 06 02.3           ~ 3 0
33 QSO J1226-0006 QSO 12 26 08.0332 -00 06 02.284   19.03 18.54     ~ 40 1
34 [ECM2006] SDSS J1226-0006 G G 12 26 08.06 -00 06 02.3           ~ 3 1
35 [ECM2006] SDSS J1226-0006 B LeI 12 26 08.12 -00 06 02.3           ~ 3 0
36 QSO J1415+1129 QSO 14 15 46.25 +11 29 43.4   17.63 17.23     ~ 580 1
37 QSO B1422+2309 QSO 14 24 38.09400 +22 56 00.5900   16.77 15.84 14.79   ~ 407 1
38 [PBW92] 1422+231 gLS 14 24 38.09400 +22 56 00.5900   16.77 15.84 14.79   ~ 354 0
39 NAME 3C 330G2 Sy2 16 09 35.0 +65 56 39   20.33       ~ 251 1
40 QSO B1830-211 QSO 18 33 39.92 -21 03 39.9     18.70 21   ~ 535 6
41 CLASS B1933+503 Rad 19 34 31.02 +50 25 23.5           ~ 81 1
42 BWE 1938+6641 gLe 19 38 25.32029 +66 48 53.4199           ~ 91 2
43 QSO B2016+112 QSO 20 19 18.2 +11 27 14     22.5     ~ 192 1
44 [MCS2004b] WFI J2026-4536 C LeI 20 26 10.40 -45 36 28.1           ~ 5 1
45 1RXS J202612.1-453623 QSO 20 26 10.45 -45 36 27.9           ~ 5 1
46 [MCS2004b] WFI J2026-4536 B LeI 20 26 10.45 -45 36 27.1           ~ 6 1
47 [VV2006] J202610.4-453627 QSO 20 26 10.45 -45 36 27.1           ~ 30 1
48 [MCS2004b] WFI J2026-4536 A1 LeI 20 26 10.47 -45 36 28.5           ~ 3 1
49 [MCS2004b] WFI J2026-4536 A2 LeI 20 26 10.49 -45 36 28.3           ~ 3 1
50 [VV2006] J203342.1-472343 QSO 20 33 42.12 -47 23 43.9           ~ 72 1
51 GB6 J2047+2643 Rad 20 47 +26.7           ~ 99 1
52 [VV2000] J221130.4+192912 QSO 22 11 30.33 +19 29 13.1   15.4       ~ 13 0

    Equat.    Gal    SGal    Ecl

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2019.10.19-15:51:54

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