NOAO >   Observing Info >   Approved Programs >   2007B-0428

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Proposal Information for 2007B-0428


PI: Peter Garnavich, University of Notre Dame, pgarnavi@nd.edu
Address: Physics Department, 225 Nieuwland Hall, Notre Dame, IN 46556, USA

CoI: Jose L. Prieto, Ohio State University
CoI: Darren DePoy, Ohio State University

Title: Finding the Lost Supernovae of the SDSS-II Supernova Search

Abstract: The SDSS-II supernova search is delivering a thousand good supernova candidates per season, but only a fraction of these can be followed spectroscopically with current resources. The main goal of the program is focused on accumulating many normal type Ia supernovae selected by multi-color photometry. Here we propose to identify and study peculiar type Ia and plateau type II (type II-P) events that are currently tossed aside by the SDSS-II search. Odd type Ia events are critical to understanding the explosion mechanism and progenitors of thermonuclear supernovae. Plateau type II supernovae are excellent distance indicators that provide an important check on the systematics of the type Ia method. Last fall the KPNO-4m was very successful in observing rare and unusual supernovae including ``peculiar'' 91bg-like and 91T- like type Ia, a broad-lined type Ic that may be a hypernova and a couple type II events useful as distance indicators. This is the last season for the SDSS-II supernova search and its unique combination of large- volume and multi-color selection of transients.


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