Other
Scientific paper
Apr 1990
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990aj.....99.1146h&link_type=abstract
Astronomical Journal (ISSN 0004-6256), vol. 99, April 1990, p. 1146-1158. Research supported by Fondo Nacional de Ciencias y Tec
Other
33
Magellanic Clouds, Stellar Spectrophotometry, Supernova 1987A, Ubv Spectra, Color-Color Diagram, Spectral Energy Distribution, Stellar Magnitude
Scientific paper
UBVRI photometry of supernova 1987A in the Large Magellanic Cloud for 813 days since outburst is presented. This photometry is based on an improved calibration of the photometry of the local standard stars and a careful analysis of the transformation from the natural system to the standard photometric system. Compared to the uniform exponential decline seen in UBVRI between days 125 and 400, SN 1987A began to fade more rapidly in all colors starting around day 500, at the time a strong thermal component appeared. Comparison with photometry of SN 1987A taken at other observatories shows that while the internal accuracy of any measurement approaches 0.01 mag, the systematic differences between UBVRI photometry obtained at different sites can be as large as 0.4 mag, due to the nonstellar nature of the spectral energy distribution of SN 1987A.
Hamuy Mario
Suntzeff Nicholas B.
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