Abstract
Quasar spectra have been used to identify gravitational lens candi-dates1–6, often in the absence of other evidence, and it has even been suggested7 that they can be used as reliably as fingerprints to uniquely identify individual objects. Here we point out that quasar spectra are sufficiently similar that, in the presence of noise, it can be extremely difficult to distinguish between different objects solely from spectral characteristics.
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References
1. Walsh, D., Carswell, R. F. & Weymann, R. J. Nature 27f, 381–384 (1979). 2. Weymann, R. J. et al. Nature 285, 641–643 (1980). 3. Weedman, D. W., Weymapn, R. J., Green, R. F. & Heckman, T. M. Astrophys. J. 255, L5–L9 (1982). 4. Djorgovski, S. & Spinrad, H. Astrophys. J. 282, L1–L4 (1984). 5. Lawrence, C. R. et al. Science 223, 46–49 (1984). 6. Turner, E. L. et al. Nature 321, 142–144 (1986). 7. Waldrop, M. M. Science 232, 936 (1986); Time May 19, 62 (1986). 8. Osterbrock, D. E. & Parker, R. A. R. Astrophys. J. 143, 268–270 (1966). 9. Davidson, K. Astrophys. J. 171, 213–231 (1972). 10. Chan, Y.–W.T. & Burbidge, E. M. Astrophys. J. 198, 45–55 (1975). 11. Hartig, G. F. & Baldwin, J. A. Astrophys. J. 302, 64–80 (1986). 12. Wampler, E. J., Gaskell, C. M., Burke, W. L. & Baldwin, J. A. Astrophys. J. 276, 403–412 (1984). 13. Wilkes, B. J. Mon. Not. R. astr. Soc. 218, 331–361 (1986). 14. Kinney, A. L., Huggins, P. J., Gassgold, A. E. & Bregman, J. N. Astrophys. J. (in the press). 15. Wilkes, B. J., Wright, A. E., Jauncey, D. L. & Peterson, B. A. Proc. astr. Soc. Aust. 5,2 (1983). 16. Baldwin, J. A. Astrophys. J. 214, 679–684 (1977). 17. Wamsteker, W. & Colina, L. Astrophys. J. 311, 617–622 (1986). 18. Grandi, S. A. Astrophys. J. 255, 25–38 (1982). 19. Wills, B. J., Netzer, H. & Wills, D. Astrophys. J. 288, 94–116 (1985). 20. Wampler, E. J. Astr. Astrophys. 161, 223–231 (1986). 21. Netzer, H. & Wills, B. J. Astrophys. J. 275, 445–460 (1983). 22. Schmidt, M. & Green, R. F. Astrophys. J. 269, 352–374 (1983). 23. Shaver, P. A. & Cristiani, S". Nature 321, 585–586 (1986). 24. Huchra, J. P. Nature 323, 784–786 (1986). 25. Gaskell, C. M. & Sparke, L. S. Astrophys. J. 305, 175–186 (1986). 26. Heckman, T. M., Bothun, G. D., Balick, B. & Smith, E. P. Astr. J. 89, 958–965 (1984). 27. Chen, J.–S. & Shaver, P. A. The Messenger No. 30, 2 (1982). 28. Shaver, P. A. & Chen, J.–S. Astr. Astrophys. 148, 443–446 (1985). 29. Kayser, R., Refsdal, S., Stabell, R. Astr. Astrophys. 166, 36–52 (1986). 30. Keel, W. C. Astrophys. J. 255, 20–24 (1982). 31. Turner, E. L. in Observational Cosmology (IAU Symp. No. 124, eds Burbidge, G. & Hewitt, A.) (in the press). 32. Yee, H. K. C. & Green, R. F. in Quasars (IAU Symp. No. 119, eds Swarup, G. & Kapahi, V. K.) 481–487 (Reidel, Dordrecht, 1986.) 33. Burke, B. F. in Quasars'(IAU Symp. No. 119, eds Swarup, G. & Kapahi, V. K.) 517–527 (Reidel, Dordrecht, 1986).
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Shaver, P., Wampler, E. & Cristiani, S. Quasar spectra and the gravitational lens hypothesis. Nature 327, 40–42 (1987). https://doi.org/10.1038/327040a0
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DOI: https://doi.org/10.1038/327040a0
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