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Discovered is shared by Shoji Suzuki (Japan) and M. Migliardi of CROSS (Italy). A type Ia supernova found 1-2 weeks before maximum light. M100 is one of our more prolific galaxies when it comes to supernovae. This will be the fifth one observed in the 100+ years we have been looking. The last one was 1979C. We have a DSS Photometry reference image made by Odd Trondal. Icon generated from the CROSS color image. This supernova is in the Constellation Coma Berenices.
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http://www.aoas.org/forum/viewtopic.php?showtopic=709