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The Nonvariability of the Progenitor of Supernova 1993J in M81

Cohen, Judith G. and Darling, Jeremy and Porter, Alain (1995) The Nonvariability of the Progenitor of Supernova 1993J in M81. Astronomical Journal, 110 (1). pp. 308-311. ISSN 0004-6256. doi:10.1086/117520.

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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.

Item Type:Article
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URLURL TypeDescription
Cohen, Judith G.0000-0002-8039-4673
Darling, Jeremy0000-0003-2511-2060
Additional Information:© American Astronomical Society • Provided by the NASA Astrophysics Data System. J. G. C. is grateful to Alvio Renzini for helpful discussions and for the hospitality of the Institute of Astronomy at the University of Bologna. National Science Foundation (NSF) Grant No. AST-8212270 supported the search for novae in M81 and other nearby galaxies. J. K. D. was supported in part by a Student Undergraduate Research Fellowship from Caltech and in part by a REU supplement to NSF Grant No. AST-9213761.
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Caltech Summer Undergraduate Research Fellowship (SURF)UNSPECIFIED
NSF Undergraduate Research ProgramAST-9213761
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Record Number:CaltechAUTHORS:20190603-153225250
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:96089
Deposited By: George Porter
Deposited On:04 Jun 2019 21:35
Last Modified:16 Nov 2021 17:17

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