CTQ 414: A New Gravitational Lens

Details CTQ 414: A New Gravitational Lens CTQ 414: A New Gravitational Lens

1999-06-09

arxiv.org/abs/astro-ph/9906173v1

Astronomy and Astrophysics

Astrophysics

Latex, 18 pages including 2 ps figures; accepted for publication in AJ

Scientific paper

10.1086/301056

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 1.2 arcsec 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 HST/NICMOS observations have confirmed the identification of the fainter object as the lensing galaxy. VLA observations at 8.46 GHz reveal that all components of the lensing system are radio quiet down to the 0.2 mJy flux level.

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