2014A&A...566A..36K -
Astronomy and Astrophysics, volume 566A, 36-36 (2014/6-1)
New near-infrared observations and lens-model constraints for UM 673.
KOPTELOVA E., CHIUEH T., CHEN W.P. and CHAN H.H.
Abstract (from CDS):
We performed a detailed photometric analysis of the lensed system
UM673 (
Q0142-100) and an analysis of the tentative lens models.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.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 2.14mag. 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.
Abstract Copyright:
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Journal keyword(s):
gravitational lensing: strong - methods: data analysis - quasars: individual: UM673
VizieR on-line data:
<Available at CDS (J/A+A/566/A36): list.dat fits/*>
CDS comments:
Table 3 calibration stars not in SIMBAD.
Simbad objects:
10
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