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New “Einstein Cross” Gravitational Lens Candidates In HST WFPC2 Survey Images

Published online by Cambridge University Press:  25 May 2016

K.U. Ratnatunga ,
E.J. Ostrander ,
R.E. Griffiths  and
M. Im
K.U. Ratnatunga
Affiliation:
Johns Hopkins University, Baltimore, MD 21218, USA
E.J. Ostrander
Affiliation:
Johns Hopkins University, Baltimore, MD 21218, USA
R.E. Griffiths
Affiliation:
Johns Hopkins University, Baltimore, MD 21218, USA
M. Im
Affiliation:
Johns Hopkins University, Baltimore, MD 21218, USA

Abstract

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We report the serendipitous discovery of quadruple gravitational lens candidates using the Hubble Space Telescope. We have so far discovered two good examples of such lenses, each in the form of four faint blue images located in a symmetric configuration around a red elliptical galaxy. The high resolution of HST has facilitated the discovery of this optically selected sample of faint lenses with small (∼1″) separations between the (I∼ 25–27) lensed components and the much brighter (I∼ 19–22) lensing galaxies. The sample has been discovered in the routine processing of HST fields through the Medium Deep Survey pipeline, which fits simple galaxy models to broad band filter images of all objects detected in random survey fields using WFPC2.

Type
Chapter 9: Observational Developments
Information
Symposium - International Astronomical Union , Volume 173: Astrophysical Applications of Gravitational Lensing , 1996 , pp. 323 - 328
Copyright
Copyright © Kluwer 1996 

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