New near-infrared observations and lens-model constraints for UM673

E. Koptelova; T. Chiueh; W. P. Chen; H. H. Chan

doi:10.1051/0004-6361/201322230

New near-infrared observations and lens-model constraints for UM673

E. Koptelova, T. Chiueh, W. P. Chen, H. H. Chan

Graduate Institute of Astronomy

Research output: Contribution to journal › Article › peer-review

4 Scopus citations

Abstract

Aims. We performed a detailed photometric analysis of the lensed system UM673 (Q0142-100) and an analysis of the tentative lens models. Methods. High-resolution adaptive optics images of UM673 taken with the Subaru telescope in the H band were examined. We also analysed the J, H and K-band observational data of UM673 obtained with the 1.3 m telescope at the CTIO observatory. Results. We present photometry of quasar components A and B of UM673, the lens, and the nearby bright galaxy using H-band observational data obtained with the Subaru telescope. Based on the CTIO observations of UM673, we also present J- and H-band photometry and estimates of the J, H and K-band flux ratios between the two UM673 components in recent epochs. The near-infrared fluxes of the A and B components of UM673 and their published optical fluxes are analysed to measure extinction properties of the lensing galaxy. We estimate the extinction-corrected flux ratio between components A and B to be about 2.14 mag. We discuss lens models for the UM673 system constrained with the positions of the UM673 components, their flux ratio, and the previously measured time delay.

Original language	English
Article number	A36
Journal	Astronomy and Astrophysics
Volume	566
DOIs	https://doi.org/10.1051/0004-6361/201322230
State	Published - Jun 2014

Keywords

Gravitational lensing: strong
Methods: data analysis
Quasars: individual: UM673

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10.1051/0004-6361/201322230

Subaru H images of UM673
Koptelova, E. (Creator), Chiueh, T. (Creator), Chen, W. P. (Creator) & Chan, H. H. (Creator), Strasbourg Astronomical Data Center, 2014
DOI: 10.26093/cds/vizier.35660036, https://cdsarc.cds.unistra.fr/viz-bin/cat/J/A%20A/566/A36
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Cite this

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title = "New near-infrared observations and lens-model constraints for UM673",

abstract = "Aims. We performed a detailed photometric analysis of the lensed system UM673 (Q0142-100) and an analysis of the tentative lens models. Methods. High-resolution adaptive optics images of UM673 taken with the Subaru telescope in the H band were examined. We also analysed the J, H and K-band observational data of UM673 obtained with the 1.3 m telescope at the CTIO observatory. Results. We present photometry of quasar components A and B of UM673, the lens, and the nearby bright galaxy using H-band observational data obtained with the Subaru telescope. Based on the CTIO observations of UM673, we also present J- and H-band photometry and estimates of the J, H and K-band flux ratios between the two UM673 components in recent epochs. The near-infrared fluxes of the A and B components of UM673 and their published optical fluxes are analysed to measure extinction properties of the lensing galaxy. We estimate the extinction-corrected flux ratio between components A and B to be about 2.14 mag. We discuss lens models for the UM673 system constrained with the positions of the UM673 components, their flux ratio, and the previously measured time delay.",

keywords = "Gravitational lensing: strong, Methods: data analysis, Quasars: individual: UM673",

author = "E. Koptelova and T. Chiueh and Chen, {W. P.} and Chan, {H. H.}",

note = "Funding Information: We thank the referee for useful comments and help in improving the content of this paper. We would like to thank Luis Goicoechea for interesting discussions on the topic. We thank the PhD student H.H. Chan for his efforts in testing the NFW lens model based on the data presented in this paper. We appreciate the Subaru time allocation committee for scheduling our observations (proposal ID: S12A0150S; PI: E. Koptelova). The research project was supported by the National Taiwan University grant No. 10R40044 and by the Taiwan National Science Councils grant No. NSC99-2811-M-002-051. This research has made use of the ESO Science Archive data taken with the VLT telescope.",

year = "2014",

month = jun,

doi = "10.1051/0004-6361/201322230",

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volume = "566",

journal = "Astronomy and Astrophysics",

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TY - JOUR

T1 - New near-infrared observations and lens-model constraints for UM673

AU - Koptelova, E.

AU - Chiueh, T.

AU - Chen, W. P.

AU - Chan, H. H.

N1 - Funding Information: We thank the referee for useful comments and help in improving the content of this paper. We would like to thank Luis Goicoechea for interesting discussions on the topic. We thank the PhD student H.H. Chan for his efforts in testing the NFW lens model based on the data presented in this paper. We appreciate the Subaru time allocation committee for scheduling our observations (proposal ID: S12A0150S; PI: E. Koptelova). The research project was supported by the National Taiwan University grant No. 10R40044 and by the Taiwan National Science Councils grant No. NSC99-2811-M-002-051. This research has made use of the ESO Science Archive data taken with the VLT telescope.

PY - 2014/6

Y1 - 2014/6

N2 - Aims. We performed a detailed photometric analysis of the lensed system UM673 (Q0142-100) and an analysis of the tentative lens models. Methods. High-resolution adaptive optics images of UM673 taken with the Subaru telescope in the H band were examined. We also analysed the J, H and K-band observational data of UM673 obtained with the 1.3 m telescope at the CTIO observatory. Results. We present photometry of quasar components A and B of UM673, the lens, and the nearby bright galaxy using H-band observational data obtained with the Subaru telescope. Based on the CTIO observations of UM673, we also present J- and H-band photometry and estimates of the J, H and K-band flux ratios between the two UM673 components in recent epochs. The near-infrared fluxes of the A and B components of UM673 and their published optical fluxes are analysed to measure extinction properties of the lensing galaxy. We estimate the extinction-corrected flux ratio between components A and B to be about 2.14 mag. We discuss lens models for the UM673 system constrained with the positions of the UM673 components, their flux ratio, and the previously measured time delay.

AB - Aims. We performed a detailed photometric analysis of the lensed system UM673 (Q0142-100) and an analysis of the tentative lens models. Methods. High-resolution adaptive optics images of UM673 taken with the Subaru telescope in the H band were examined. We also analysed the J, H and K-band observational data of UM673 obtained with the 1.3 m telescope at the CTIO observatory. Results. We present photometry of quasar components A and B of UM673, the lens, and the nearby bright galaxy using H-band observational data obtained with the Subaru telescope. Based on the CTIO observations of UM673, we also present J- and H-band photometry and estimates of the J, H and K-band flux ratios between the two UM673 components in recent epochs. The near-infrared fluxes of the A and B components of UM673 and their published optical fluxes are analysed to measure extinction properties of the lensing galaxy. We estimate the extinction-corrected flux ratio between components A and B to be about 2.14 mag. We discuss lens models for the UM673 system constrained with the positions of the UM673 components, their flux ratio, and the previously measured time delay.

KW - Gravitational lensing: strong

KW - Methods: data analysis

KW - Quasars: individual: UM673

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U2 - 10.1051/0004-6361/201322230

DO - 10.1051/0004-6361/201322230

M3 - 期刊論文

AN - SCOPUS:84902152210

SN - 0004-6361

VL - 566

JO - Astronomy and Astrophysics

JF - Astronomy and Astrophysics

M1 - A36

ER -

New near-infrared observations and lens-model constraints for UM673

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Keywords

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Subaru H images of UM673

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