Astronomy and Astrophysics – Astrophysics
Scientific paper
Aug 1989
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989a%26a...220...83b&link_type=abstract
Astronomy and Astrophysics (ISSN 0004-6361), vol. 220, no. 1-2, Aug. 1989, p. 83-88.
Astronomy and Astrophysics
Astrophysics
34
Astronomical Photometry, Astronomical Spectroscopy, Supernovae, Absorption Spectra, Distance, Light Curve, Line Spectra, Magnitude
Scientific paper
An account is given of the photographic and spectroscopic observations of the supernova 1984A in NGC4419 carried out for nearly six months at Asiago after its discovery. The light and color curves and the characteristics and evolution of the spectrum of the supernova prove that it belongs to the type Ia, but with one significant peculiarity; namely, all its spectral features appear blueshifted when compared with other supernovae of the same type. The interpretation and origin of such anomaly remains still controversial. Contrary to recent claims, the photometry of this supernova does not seem peculiar. In the assumption that NGC4419 is a member of the Virgo cluster, an absolute magnitude of the supernova at maximum M(B) = -20.35 + or - 0.25 has been derived.
Barbon Roberto
Iijima Toru
Rosino Leonida
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