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Date and Time of the Query: 2019-06-25 T07:23:18 PDT
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For refcode 2008ApJ...689.1186C:
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2008ApJ...689.1186C The Nature and Geometry of the Light Echo from SN 2006X Crotts, Arlin P. S.; Yourdon, David Abstract. We report on the discovery of the geometry producing the light echo emanating from supernova 2006X, a nearby but underluminous Type Ia supernova (SN Ia) in M100 (=NGC 4321). This offers a rare chance to study the environment of a SN Ia. Contrary to previous reports, there is little evidence of a circumstellar component in the light echo morphology or in the light curve of the unresolved SN point source. Instead, the obvious and dominant echo contribution comes from what is probably a relatively thin sheet of material some 26 pc in front of SN 2006X. Of the four known SN Ia light echoes, three show no evidence of a circumstellar echo and the fourth needs to be confirmed. We consider other evidence for circumstellar material around SN Ia, which may be rare. Key words: ISM: Dust, Extinction, Galaxies: Individual: NGC Number: NGC 4321, Galaxies: ISM, Stars: Supernovae: General, supernovae: individual (SN 2006X)
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