Astronomy and Astrophysics – Astronomy
Scientific paper
Jan 1983
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983pasp...95...72b&link_type=abstract
Astronomical Society of the Pacific, Publications, vol. 95, Jan. 1983, p. 72-78.
Astronomy and Astrophysics
Astronomy
58
Stellar Spectrophotometry, Supernovae, Light Curve, Stellar Color, Stellar Magnitude, Ubv Spectra
Scientific paper
The U, B, V, and R light curves exhibit the typical forms of a Type I SN and suggest that the maximum occurred on JD2444672 when the SN was at B(max) = 12.00. The color indices (B-V) and (U-B) vary in systematic fashion with time and follow closely the mean evolution found from previous Type I SN by Pskovskii (1967, 1970, 1977). Assuming that the absolute magnitude of SN 1981b is M0(max) = -18.5, based on previous Type I SN on the zero point of the de Vaucouleurs distance scale, then the distance modulus of NGC 4536 is 30.29; this is in excellent agreement with the mean modulus, 30.1 + or - 0.3, derived from eight tertiary and quaternary indicators on the same zero point. Both of these values are about 1.5 m lower than the distance modulus that would be derived from the redshift of the galaxy, even on the same zero point.
Buta Ronald J.
Turner Amanda
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