Redshift of the Einstein Ring in MG1549+305

Details Redshift of the Einstein Ring in MG1549+305 Redshift of the Einstein Ring in MG1549+305

2003-06-02

arxiv.org/abs/astro-ph/0306045v1

Mon.Not.Roy.Astron.Soc. 343 (2003) L29

Astronomy and Astrophysics

Astrophysics

4 pages, 3 figures, accepted for publication in MNRAS

Scientific paper

10.1046/j.1365-8711.2003.06858.x

A deep spectrum taken with the Echelle Spectrograph and Imager (ESI) at the Keck II Telescope as part of the Lenses Structure and Dynamics (LSD) Survey reveals the redshifts of the extremely red source of the radio Einstein Ring in the gravitational lens system MG1549+305 ($z_{\rm s}=1.170\pm 0.001$) and an intermediate redshift lensed spiral galaxy ($z_{\rm G2}=0.604\pm 0.001$). The source redshift allows us to determine the mass of the SB0 lens galaxy enclosed by the Einstein Radius ($R_{\rm E}=1\farcs15\pm0\farcs05$) $M_{\rm E}$$\equiv$$M(

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