A New Method to Calibrate the Magnitudes of Type Ia Supernovae at Maximum Light

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dc.creatorPrieto, Jose Luis
dc.creatorRest, Armin
dc.creatorSuntzeff, Nicholas B.
dc.date2006-03-15
dc.date.accessioned2026-07-07T10:43:42Z
dc.date.available2026-07-07T10:43:42Z
dc.descriptionWe present a new empirical method for fitting multicolor light curves of Type Ia supernovae. Our method combines elements from two widely used techniques in the literature: the delta_m15 template fitting method and the Multicolor Light-Curve Shape method. An advantage of our technique is the ease of adding new colors, templates, or parameters to the fitting procedure. We use a large sample of published light curves to calibrate the relations between the absolute magnitudes at maximum and delta_m15 in BVRI filters. We find that individual subsamples from a given survey or publication have significantly tighter relationships between light curve shape and luminosity than the relationship derived from the sum of all the samples, pointing to uncorrected systematic errors in the photometry, mainly in BV filters. Using our method, we calculate luminosity distances and host galaxy reddening to 89 SNe in the Hubble flow and construct a low-z Hubble diagram. The dispersion of the SNe in the Hubble diagram is 0.20 mag, or an error of ~9% in distance to a single SN. Our technique produces similar or smaller dispersion in the low-z Hubble diagram than other techniques in the literature.
dc.description43 pages, 16 figures, 6 tables, accepted by ApJ. For additional material go to http://www.astronomy.ohio-state.edu/~prieto/paper_dm15/dm15.html
dc.identifierhttps://arxiv.org/abs/astro-ph/0603407
dc.identifierhttp://arxiv.org/abs/astro-ph/0603407
dc.identifierAstrophys.J.647:501-512,2006
dc.identifierdoi:10.1086/504307
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/182335
dc.subjectAstrophysics
dc.titleA New Method to Calibrate the Magnitudes of Type Ia Supernovae at Maximum Light
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