A new gravitational lens from the MUSCLES survey: ULAS J082016.1+081216
A new gravitational lens from the MUSCLES survey: ULAS J082016.1+081216
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来自 MUSCLES 调查的新型引力透镜:ULAS J082016.1 081216
DOI:
10.1111/j.1365-2966.2009.15198.x
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发表时间:
2009
影响因子:
4.8
通讯作者:
S. University
中科院分区:
文献类型:
--
作者:
N. Jackson;E. Ofek;M. O. U. O. Manchester;J. B. C. F. Astrophysics;Caltech;Kipac;S. University
We present observations of a new double-image gravitational lens system, ULAS J082016.1+081216, of image separation 2.3 and high ({approx}6) flux ratio. The system is selected from the Sloan Digital Sky Survey spectroscopic quasar list using new high-quality images from the UKIRT Deep Sky Survey (UKIDSS). The lensed quasar has a source redshift of 2.024, and we identify the lens galaxy as a faint red object of redshift 0.803 {+-} 0.001. Three other objects from the UKIDSS survey, selected in the same way, were found not to be lens systems. Together with the earlier lens found using this method, the SDSS-UKIDSS lenses have the potential to significantly increase the number of quasar lenses found in SDSS, to extend the survey to higher flux ratios and lower separations, and to give greater completeness which is important for statistical purposes.
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