The composite image of Sanduleak -69 deg 202, candidate precursor to supernova 1987 A in the Large Magellanic Cloud
Citations Over TimeTop 10% of 1987 papers
Abstract
The image of Sk -69 deg 202 has been analyzed on the basis of eight (of 32 available) CTIO 4-m prime-focus plates obtained in 1974-1983, covering wavelengths from blue through NIR. Density differences and intensity syntheses based upon reference stars from the same plates are presented. The 12th mag blue supergiant (star 1) has two companions with V magnitudes, position angles, and separations 15.3, 315 deg, and 3 arcsec (star 2) and 15.7, 115 deg, and 1.5 arcsec (star 3), respectively. Both companions appear to be early-type stars; there is no evidence for a very red star in the system. The two companions are capable in principle of producing the current IUE spatial and spectral results, consistent with the interpretation that star 1 has disappeared.
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