A supernova factory in Mrk 273
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Granada | Spain. | Italy. | D. Astronomia | U.K. | J. Observatory | Macclesfield | M. Bondi | Bologna | U. Bologna | M. Pérez-Torres | D. Dallacasa | Jodrell Bank Observatory | I. D. A. D. A. Csic | T.W.B. Muxlow INAF-IRA