Determining the Type, Redshift, and Phase of a Supernova Spectrum

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dc.creatorBlondin, Stéphane
dc.creatorTonry, John L.
dc.date2006-12-18
dc.date.accessioned2026-07-07T10:36:43Z
dc.date.available2026-07-07T10:36:43Z
dc.descriptionWe present an algorithm to identify the types of supernova spectra, and determine their redshift and phase. This algorithm, based on the correlation techniques of Tonry & Davis, is implemented in the SuperNova IDentification code (SNID). It is used by members of the ESSENCE project to determine whether a noisy spectrum of a high-redshift supernova is indeed of type Ia, as opposed to, e.g., type Ib/c. Furthermore, by comparing the correlation redshifts obtained using SNID with those determined from narrow lines in the supernova host galaxy spectrum, we show that accurate redshifts (with a typical error < 0.01) can be determined for SNe Ia for which a spectrum of the host galaxy is unavailable. Last, the phase of an input spectrum is determined with a typical accuracy of ~3 days.
dc.description10 pages, 7 figures. To appear in "The Multicoloured Landscape of Compact Objects and their Explosive Progenitors: Theory vs Observations" (Cefalu, Sicily, June 2006). Eds. L. Burderi et al. (New York: AIP)
dc.identifierhttps://arxiv.org/abs/astro-ph/0612512
dc.identifierhttp://arxiv.org/abs/astro-ph/0612512
dc.identifierAIPConf.Proc.924:312-321,2007
dc.identifierdoi:10.1063/1.2774875
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/180146
dc.subjectAstrophysics
dc.titleDetermining the Type, Redshift, and Phase of a Supernova Spectrum
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