THE BRIGHT SUPERNOVA 1979 c IN M100

The U, B, V light and color curves of SN 1979c in M100 from 1979 April 15 to August 4 are derived from coordinated visual, photographic, and photoelectric observations at the McDonald and U.S. Naval Observatories supplemented by Kaila's prediscovery observation and IUE data. The light curves, c...

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Bibliographic Details
Published in:Publications of the Astronomical Society of the Pacific 1981-02, Vol.93 (551), p.36-44
Main Authors: DE VAUCOULEURS, G., DE VAUCOULEURS, A., BUTA, R., ABLES, H. D., HEWITT, A. V.
Format: Article
Language:English
Subjects:
Absolute magnitude
Astronomical magnitude
Comparison stars
Interstellar extinction
Light curves
Luminosity
Observatories
Reflectors
Supernovae
Virgo Cluster
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Summary:The U, B, V light and color curves of SN 1979c in M100 from 1979 April 15 to August 4 are derived from coordinated visual, photographic, and photoelectric observations at the McDonald and U.S. Naval Observatories supplemented by Kaila's prediscovery observation and IUE data. The light curves, color curves, color-color evolution, and color excess of the supernova are discussed. The distance modulus of M100 derived by eight methods is µo — 30.30 ± 0.15. The absolute magnitude (corrected for extinction) of SN 1979c at or near maximum on April 15 was MMo(B) = — 19.45 with (B — V)Mo ≃ ≃ 0.13 and (U — B)Mo ≃ ≃ 0.97, making it the brightest type II supernova on record. The corrected color indices at maximum match those of a blackbody at T = 18,000 K, but do not fit the blackbody curve at later times.
ISSN:0004-6280
1538-3873