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A postmortem investigation of the Type IIb supernova 2001ig

Stuart D. Ryder·Clair E. Murrowood·Raylee A. Stathakis
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Abstract

We present images taken with the GMOS instrument on Gemini-South, in excellent (<0.5 arcsec) seeing, of SN 2001ig in NGC 7424, ~1000 days after explosion. A point source seen at the site of the SN is shown to have colours inconsistent with being an H II region or a SN 1993J-like remnant, but can be matched to a late-B through late-F supergiant with A_V<1. We believe this object is the massive binary companion responsible for periodic modulation in mass loss material around the Wolf-Rayet progenitor which gave rise to significant structure in the SN radio light curve.

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Stuart D. Ryder, Clair E. Murrowood, Raylee A. Stathakis. 2006-03-14. A postmortem investigation of the Type IIb supernova 2001ig. https://doi.org/10.1111/j.1745-3933.2006.00168.x

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