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astro-ph1997★ 24 cited
Two Close-Separation Quasar-Quasar Pairs in the Large Bright Quasar Survey
Paul C. Hewett, Craig B. Foltz, Margaret E. Harding +1
We present photometric and spectroscopic observations of two close quasar-quasar pairs found in the Large Bright Quasar Survey (LBQS) (Hewett et al. 1995, AJ, 109, 1498). The two c…
astro-ph1997★ 61 cited
Microlensing induced spectral variability in Q2237+0305
G. F. Lewis, M. J. Irwin, P. C. Hewett +1
We present both photometry and spectra of the individual images of the quadruple gravitational lens system Q2237+0305. Comparison of spectra obtained at two epochs, separated by $\…