Optical observations of SN 1987D in UGC 7370

Details Optical observations of SN 1987D in UGC 7370 Optical observations of SN 1987D in UGC 7370

Nov 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987pasp...99.1167s&link_type=abstract

Astronomical Society of the Pacific, Publications (ISSN 0004-6280), vol. 99, Nov. 1987, p. 1167-1173. Research supported by the

Astronomy and Astrophysics

Astronomy

12

Abundance, Brightness, Stellar Evolution, Stellar Spectrophotometry, Supernovae, Red Shift, Silicon, Spline Functions, Stellar Magnitude, Virgo Galactic Cluster

Scientific paper

The authors present optical photometry and spectroscopy of SN 1987D, a Type Ia supernova in the nearby galaxy UGC 7370, during the period immediately subsequent to its discovery. The distance modulus of the galaxy, independently determined by the redshift and the Tully-Fisher relation, is 32.3±1.0. The maximum brightness of SN 1987D was V ≈ 13.2 and occured on 1987 April 18±4 days; the absolute luminosity is ≈0.6 mag brighter than the average for SNe Ia. The spectrum of SN 1987D is typical of SNe Ia, but the expansion velocity (9600 km s-1) is considerably lower than average.

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