Supernova 2011fe in M101

Supernova 2011fe was discovered on August 24, 2011 by Palomar Transient Factory (PTF) and first designated PTF11kly, when it was very young at mag 17.2 and rapidly rising. From its spectrum, it was cassified as of very young type Ia. It had not been visible on August 22. As of August 31, it had rised to mag 11.3, and reached mag 9.9 on its peak which was reached around September 9 or 10, 2011. Until mid of December, it had shone brighter than mag 13.5, and to end of March 2012, to mag 15.6.

This is the closest supernova of type Ia to be observed since 1972. It may be significant for the gauging of the distance scale of the intergalactic universe as derived from this type of "Standard Candles."

.. more to come soon ..


Hartmut Frommert
Christine Kronberg

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Last Modification: February 6, 2012