# Detection of Lens Candidates for the Double Quasar Q2345+007

@article{Fischer1994DetectionOL,
title={Detection of Lens Candidates for the Double Quasar Q2345+007},
author={Philippe Fischer and J. Anthony Tyson and Gary M. Bernstein and Puragra Guhathakurta},
journal={The Astrophysical Journal},
year={1994},
volume={431}
}
Luminous objects associated with the 7.06\arcsec\ separation double quasar Q2345+007 have, until now, escaped detection. In this letter we present the results of the deepest known imaging of the region surrounding the quasar. The total exposure times were 47600 seconds in B$_j$ (101 frames) and 32160 seconds in R (82 frames). The frames came from CFHT, CTIO, and KPNO. We detect a B$_j$ = 25.0 mag galaxy (B$_j$ -- R = 0.5 mag) in close proximity to the fainter QSO image, possibly at $z = 1.49… Expand Chandra Observations of the QSO Pair Q2345+007: Binary or Massive Dark Lens? The components of the wide (73) separation quasar pair Q2345+007A,B (z = 2.15) have the most strikingly similar optical spectra seen to date (Steidel & Sargent) yet no detected lensing mass, makingExpand Weak Lensing Analysis of Cl 1358+62 Using Hubble Space Telescope Observations* • Physics • 1998 We report on the detection of weak gravitational lensing of faint, distant background objects by Cl 1358+62, a rich cluster of galaxies at a redshift of z = 0.33. The observations consist of a large,Expand Hubble Space Telescope weak-lensing study of the z=0.83 cluster MS 1054-03 • Physics • 2000 We have measured the weak gravitational lensing of faint, distant background galaxies by MS 1054-03, a rich and X-ray luminous cluster of galaxies at a redshift of z = 0.83, using a two-color mosaicExpand Binary Quasars in the Sloan Digital Sky Survey: Evidence for Excess Clustering on Small Scales We present a sample of 221 new quasar pairs with proper transverse separations Rprop < 1 h-1 Mpc over the redshift range 0.5 < z < 3.0, discovered from an extensive follow-up campaign to findExpand A comparison of weak-lensing masses and X-ray properties of galaxy clusters We present measurements of the masses of 20 X-ray luminous clusters of galaxies at intermediate redshifts, determined from a weak-lensing analysis of deep archival R-band data obtained using theExpand Cluster Cores, Gravitational Lensing, and Cosmology • Physics • 1996 Many multiply imaged quasars have been found over the years, but none so far with image separation in excess of 8''. The absence of such large splittings has been used as a test of cosmologicalExpand Probing Ly$\alpha\$ absorbers with double lines of sight
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Looking for and studying very distant galaxy clusters, clusters at z>1, are one of the prime subjects of the modern observational cosmology. If the metallicity of the hot intra-cluster medium in veryExpand
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#### References

SHOWING 1-4 OF 4 REFERENCES
Density Estimation for Statistics and Data Analysis.
• Computer Science
• 1988
The two main aims of the book are to explain how to estimate a density from a given data set and to explore how density estimates can be used, both in their own right and as an ingredient of other statistical procedures. Expand
Preprint from Max-Planck Institut fur Astrophysik
• Preprint from Max-Planck Institut fur Astrophysik
• 1994
TinyTim User's Guide, STScI
• TinyTim User's Guide, STScI
• 1992
This preprint was prepared with the AAS L A T E X macros v3
• This preprint was prepared with the AAS L A T E X macros v3