We report the discovery of extremely unusual structure in the radio source MG1131 + 0456. In a radio map with sub~arc$econd resolution the object appears as an elliptical ring of emission accompanied by a pair of more compact sources, nearly diametrically opposed and offset ∼0.3 arc s to the south-west of the ring. There is a faint, slightly extended, optical counterpart. In its spectrum we detect a continuum but no emission lines; therefore the redshift of the counterpart is unknown. The radio morphology suggests that this source may be an example of an 'Einstein ring'1, a highly symmetric case of grayitational lensing in which the source is imaged into a ring. Other explanations that we consider are excluded by the data. Another possibility is that MG1131 +0456 represents a new type of (unlensed) astronomical object.
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Einstein, A. Science 84, 506 (1936).
Bennett, C. L., Lawrence, C. R., Burke, B. F., Hewitt, J. N. & Mahoney, J. Astrophys. J. Suppl. Sev. 61, 1–104 (1986).
IRAS Point Source Catalog (US Government Printing Office, Washington DC, 1985).
IRAS Small Extended Source Catalog (US Government Printing Office, Washington DC, 1985).
A. Niell, thesis, Cornell Univ. (1971).
Schramm, T. & Kayser R. Astr. Astrophys. 174, 361 (1987).
Blandford, R. D. & Kochanek, C. S. Astrophys. J. 321, 658–675 (1987).
Turner, E. L., Ostriker, J. P. & Gott, J. R. III Astrophys. J. 284, 1–22 (1984).
Yusef-Zadeh, F., Morris, M. & Chance, D. Nature 310, 557–561 (1984).
Morris, M. & Yusef-Zadeh, F. Astr. J. 90, 2511–2513 (1985).
Shaver, P. A., Salter, C. J., Patnaik, A. R., van Gorkom, J. H. & Hunt, G. C. Nature 313, 113–115 (1985).
Becker, R. H. & Helfand, D. J. Nature 313, 115–118 (1985).
Yusef-Zadeh, F. & Bally, J. Nature 330, 455–458 (1987).
Soucail, G., Fort, B., Mellier, Y. & Picat, J. P. Astr. Astrophys. 172, L14–L16 (1987).
Lynds, R. & Petrosian, V. Bull. Am. astr. Soc. 18, 1014 (1986).
Paczynski, B. Nature 325, 572 (1987).
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Hewitt, J., Turner, E., Schneider, D. et al. Unusual radio source MG1131+0456: a possible Einstein ring. Nature 333, 537–540 (1988). https://doi.org/10.1038/333537a0
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