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First-Year Spectroscopy for the Sloan Digital Sky Survey-II Supernova Survey
Stockholm University, Faculty of Science, Department of Astronomy.
Stockholm University, Faculty of Science, Department of Physics. Stockholm University, Faculty of Science, The Oskar Klein Centre for Cosmo Particle Physics (OKC).
Stockholm University, Faculty of Science, Department of Physics.
2008 (English)In: Astronomical Journal, ISSN 0004-6256, E-ISSN 1538-3881, Vol. 135, no 5, 1766-1784 p.Article in journal (Refereed) Published
Abstract [en]

This paper presents spectroscopy of supernovae (SNe) discovered in the first season of the Sloan Digital Sky Survey-II SN Survey. This program searches for and measures multi-band light curves of SNe in the redshift range z = 0.05-0.4, complementing existing surveys at lower and higher redshifts. Our goal is to better characterize the SN population, with a particular focus on SNe Ia, improving their utility as cosmological distance indicators and as probes of dark energy. Our SN spectroscopy program features rapid-response observations using telescopes of a range of apertures, and provides confirmation of the SN and host-galaxy types as well as precise redshifts. We describe here the target identification and prioritization, data reduction, redshift measurement, and classification of 129 SNe Ia, 16 spectroscopically probable SNe Ia, 7 SNe Ib/c, and 11 SNe II from the first season. We also describe our efforts to measure and remove the substantial host-galaxy contamination existing in the majority of our SN spectra.

Place, publisher, year, edition, pages
2008. Vol. 135, no 5, 1766-1784 p.
National Category
Astronomy, Astrophysics and Cosmology
Identifiers
URN: urn:nbn:se:su:diva-18353DOI: 10.1088/0004-6256/135/5/1766ISI: 000255407700012OAI: oai:DiVA.org:su-18353DiVA: diva2:184876
Available from: 2009-01-25 Created: 2009-01-25 Last updated: 2012-04-17Bibliographically approved

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Sollerman, JesperGoobar, Ariel
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