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For refcode 1989A&AS...80..379B:
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Copyright by European Southern Observatory (ESO). Reproduced by permission
1989A&AS...80..379B Infrared photometry and spectrophotometry of SN 1987A. I. March to October 1987 observations P. Bouchet, A. Moneti, E. Slezak. T. Le Bertre and J. Manfroid E.S.O., Casilla 19001, Santiago 19, Chile E.S.O., Karl-Schwarzschild-Str. 2, D-8046 Garching bei Munchen, F.R.G. Departement d'Astrophysique de l'Univertite de Liege, 5 av. de Cointe, B-4200 Cointe-Ougree, Belgium Received May 9, 1988; accepted June 30, 1989 Summary, -- We present infrared (1-20 micron) observations of SN 1987A obtained at ESO La Silla between March 16 and October 12, 1987; photometry and narrow band spectrophotometry ({lambda}/ {DELTA}{lambda} = 60) were acquired during that period. The infrared light curves and the spectra are shown and discussed. The infrared photometry is combined with optical photometry to determine the variations of the bolometric luminosity. The spectral energy distribution can be well approximated by the sum of two blackbodies: the effective radius and the effective temperature of the hotter component are derived and the evolution and the nature of the cooler component are discussed. Hydrogen lines are observed in the spectrum from the very beginning, and the line intensities increased with time throughout our monitoring period. CO emission is observed beginning in mid-June, and from the shape of the bands a temperature of about 4000 K is derived. Several lines in addition to those of hydrogen have been detected, but for most of them the identification is not clear. There is no spectral evidence for dust emission. Key words: infrared radiation - photometry - spectrophotometry - supernovae and supernova remnants: SN 1987A
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