The optical light curve of SN 1987A in Geneva photometry

Details The optical light curve of SN 1987A in Geneva photometry The optical light curve of SN 1987A in Geneva photometry

Jan 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991a%26as...87..163b&link_type=abstract

Astronomy and Astrophysics Supplement Series (ISSN 0365-0138), vol. 87, no. 1, Jan. 1991, p. 163-175. SNSF-supported research.

Astronomy and Astrophysics

Astrophysics

10

Astronomical Photometry, Companion Stars, Light Curve, Magellanic Clouds, Supernova 1987A, Galactic Structure, Stellar Luminosity

Scientific paper

SN 1987A has been monitored in the seven colors of the Geneva photometric system from February 24, 1987 to August 28, 1989. The complete set of photometric data are presented here. The accuracy of the m(V) measurement surpasses 0.004 mag over a large portion of the survey. Consequently, no significant short term variability was found along the light curve. The seven absolute light curves are derived by applying the following corrections to the data: subtraction of the contributions of the two companion stars of the progenitor, use of a well established distance modulus of the LMC, and dereddening with the most likely color excess of the progenitor currently available. A smoothed version of the seven absolute magnitude curves is given as well as an estimate of the uncertainties over the absolute magnitudes. The monochromatic fluxes expressed in W/sq m per Hz and the monochromatic luminosities in W/Hz are computed for each filter. The optical luminosity in the wavelength range 3000 to 6380 A is also computed. These values are compared with the fluxes and bolometric magnitudes of Suntzeff and Bouchet (1990). The main phases of the light curve are discussed on the basis of our photometric data.

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