The Nonvariability of the Progenitor of Supernova 1993J in M81

Details The Nonvariability of the Progenitor of Supernova 1993J in M81 The Nonvariability of the Progenitor of Supernova 1993J in M81

Jul 1995

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995aj....110..308c&link_type=abstract

Astronomical Journal v.110, p.308

Astronomy and Astrophysics

Astronomy

21

Supergiants, Stars: Evolution, Supernovae: Individual: 1993J

Scientific paper

An archive of images taken in the early 1980s exists for a field which includes the progenitor of supernova 1993J in M81. Fifty-four CCD frames in V, and several in other colors from this set taken in 1984 are analyzed to demonstrate that the progenitor of supernova 1993J was not variable to within a limit of 0.2 mag. The frames analyzed cover a time span of 150 days. The colors of the M81 SN progenitor are consistent with those of a late G supergiant.

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