Physics
Scientific paper
Oct 1987
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987natur.329..608m&link_type=abstract
Nature (ISSN 0028-0836), vol. 329, Oct. 15, 1987, p. 608-611. SERC-supported research.
Physics
44
Magellanic Clouds, Speckle Interferometry, Spectral Energy Distribution, Stellar Spectrophotometry, Supernova 1987A, Visible Spectrum, Radiant Flux Density, Spatial Distribution
Scientific paper
Optical speckle interferometric observations of SN1987A on days 38, 47, and 50 after the explosion on February 23, 1987 are reported. The supernova itself was unresolved, with angular radius upper limits of about 0.12 arcsec at 3869 A, 0.015 arcsec at 4861 A and 4921 A, and 0.020 arcsec at 5875 A and 6585 A, consistent with angular radii derived from photometry and spectroscopy. A second source was observed at 6585 A on day 50. Its offset from the supernova is measured to have been 0.074 + or - 0.008 arcsec, and it is estimated to have been about 3 mag fainter than the supernova at 6585 A at the same epoch. Such a bright source was not present before the explosion, implying that it was caused by the supernova.
Matcher Stephen J.
Meikle Peter S. W.
Morgan Brian L.
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