Astronomy and Astrophysics – Astrophysics
Scientific paper
1998-03-13
Astrophys.J. 503 (1998) 118
Astronomy and Astrophysics
Astrophysics
Latex 24 pages, 6 figures. accepted for publication in Astrophysical Journal
Scientific paper
10.1086/305983
We present a high-resolution spectrum of the high redshift, lensed quasar Q1208+1101, obtained with the echellette spectrograph on the Multiple Mirror Telescope. We examine the new and published spectra and provide an updated list of high-confidence metal-line absorption systems at z=1.1349, 2.8626, 2.9118, 2.9136, 2.9149. Combining this with a simple model of the gravitational lens system allows us to constrain the possible lens redshifts. The high-redshift (z > 2.5) and low-redshift (z < 0.4) candidates can be ruled out with high confidence. The current spectra effectively probe about 40% of the redshift range in which the lens is expected. In that range, there is only one known metal-line absorption system, an MgII absorber at z=1.1349. We consider the possibility that this system is the lensing galaxy and discuss the implied parameters of the galaxy.
Aldcroft Thomas L.
Bechtold Jill
Keeton Charles R.
McLeod Kim K.
Siemiginowska Aneta
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