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首页> 外文期刊>The Astrophysical journal >CTQ 414: A New Gravitational Lens*
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CTQ 414: A New Gravitational Lens*

机译:CTQ 414:新型引力透镜*

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摘要

We report the discovery and ground-based observations of the new gravitational lens CTQ 414. The source quasar lies at a redshift of z = 1.29 with a B magnitude of 17.6. Ground-based optical imaging reveals two point sources separated by 12 with a magnitude difference of roughly 1 mag. Subtraction of two stellar point-spread functions from images obtained in subarcsecond seeing consistently leaves behind a faint, residual object. Fits for two point sources plus an extended object places the fainter object collinear with the two brighter components. Subsequent Hubble Space Telescope Near Infrared Camera and Multi-Object Spectrometer (NICMOS) observations have confirmed the identification of the fainter object as the lensing galaxy. Very Large Array observations at 8.46 GHz reveal that all components of the lensing system are radio-quiet down to the 0.2 mJy flux level.
机译:我们报告了新的引力透镜CTQ 414的发现和基于地面的观测结果。源类星体位于z = 1.29的红移处,其B幅值为17.6。基于地面的光学成像显示两个点源,相隔12个点,幅度差约为1 mag。从亚秒级获得的图像中减去两个恒星点扩展函数,始终会留下一个微弱的残差对象。适用于两个点源以及一个扩展对象,使较暗的对象与两个较亮的分量共线。随后的哈勃太空望远镜近红外摄像机和多目标光谱仪(NICMOS)观测结果证实了将较暗的物体识别为透镜星系。在8.46 GHz的超大型阵列观测结果表明,透镜系统的所有组件在达到0.2 mJy通量水平时都非常安静。

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