This page lists only data from SN 2011by compiled by the CfA SN Group

A partial list of SN classified in 2010 is found here: [Archive (2010)]

SN classified in previous years are found here: [Archive (1996-2009)]

All supernovae are classified using the SuperNova IDentification code (SNID) [Blondin & Tonry (2007)]
To learn more and to [Download SNID]

If you would like to receive announcements for supernovae classified by the CfA SN group, or
if you want to discuss specific data, please contact: Howie Marion

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SN 2011by

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April 28 UT, FAST spectrum with a comparison to SN 2003du at -10d

April 28 UT, FAST spectrum with a comparison to SN 2007af at -5d

April 28 UT, FAST spectrum with a comparison to SN 1990O at -5d

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