New near-infrared observations and lens-model constraints for UM673
arXiv:1307.2390 · doi:10.1051/0004-6361/201322230
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 1.3m 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
Submitted to A&A, 10 pages, 9 figures, 7 tables
References in corpus (8)
- Planck 2013 results. XVI. Cosmological parameters
- JHK Observations of Faint Standard Stars in the Mauna Kea Near-Infrared Photometric System
- Extinction Curves of Lensing Galaxies out to z=1
- COSMOGRAIL: the COSmological MOnitoring of GRAvItational Lenses VI. Redshift of the lensing galaxy in seven gravitationally lensed quasars
- A Study of Gravitational Lens Chromaticity using Ground-based Narrow Band Photometry
- Properties of dust in early-type galaxies
- Flux and color variations of the doubly imaged quasar UM673
- Long-term monitoring, time delay and microlensing in the gravitational lens system Q0142-100