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. https://resolver.caltech.edu/CaltechAUTHORS:20190603-153225250
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Abstract
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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| 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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| Issue or Number: | 1 | |||||||||
| DOI: | 10.1086/117520 | |||||||||
| Record Number: | CaltechAUTHORS:20190603-153225250 | |||||||||
| Persistent URL: | https://resolver.caltech.edu/CaltechAUTHORS:20190603-153225250 | |||||||||
| Usage Policy: | No commercial reproduction, distribution, display or performance rights in this work are provided. | |||||||||
| ID Code: | 96089 | |||||||||
| Collection: | CaltechAUTHORS | |||||||||
| Deposited By: | George Porter | |||||||||
| Deposited On: | 04 Jun 2019 21:35 | |||||||||
| Last Modified: | 16 Nov 2021 17:17 |
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