CTQ 414: A new gravitational lens

Nicholas D. Morgan; Alan Dressler; José Maza; Paul L. Schechter; Joshua N. Winn

doi:10.1086/301056

CTQ 414: A new gravitational lens

Nicholas D. Morgan, Alan Dressler, José Maza, Paul L. Schechter, Joshua N. Winn

Research output: Contribution to journal › Article › peer-review

23 Scopus citations

Abstract

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 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.

Original language	English (US)
Pages (from-to)	1444-1449
Number of pages	6
Journal	Astronomical Journal
Volume	118
Issue number	4
DOIs	https://doi.org/10.1086/301056
State	Published - Oct 1999
Externally published	Yes

All Science Journal Classification (ASJC) codes

Astronomy and Astrophysics
Space and Planetary Science

Keywords

Gravitational lensing
Quasars: individual (CTQ 414)

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10.1086/301056

Cite this

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title = "CTQ 414: A new gravitational lens",

abstract = "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 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.",

keywords = "Gravitational lensing, Quasars: individual (CTQ 414)",

author = "Morgan, {Nicholas D.} and Alan Dressler and Jos{\'e} Maza and Schechter, {Paul L.} and Winn, {Joshua N.}",

year = "1999",

month = oct,

doi = "10.1086/301056",

language = "English (US)",

volume = "118",

pages = "1444--1449",

journal = "Astronomical Journal",

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TY - JOUR

T1 - CTQ 414

T2 - A new gravitational lens

AU - Morgan, Nicholas D.

AU - Dressler, Alan

AU - Maza, José

AU - Schechter, Paul L.

AU - Winn, Joshua N.

PY - 1999/10

Y1 - 1999/10

N2 - 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 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.

AB - 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 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.

KW - Gravitational lensing

KW - Quasars: individual (CTQ 414)

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CTQ 414: A new gravitational lens

Abstract

All Science Journal Classification (ASJC) codes

Keywords

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