First-year spectroscopy for the Sloan Digital Sky Survey-II supernova survey

Zheng, Chen, Romani, Roger W, Sako, Masao, Marriner, John, Bassett, Bruce, Becker, Andrew, Choi, Changsu, Cinabro, David, DeJongh, Fritz, Depoy, Darren L, Dilday, Ben, Doi, Mamoru, Frieman, Joshua A, Garnavich, Peter M, Hogan, Craig J, Holtzman, Jon, Im, Myungshin, Jha, Saurabh, Kessler, Richard, Konishi, Kohki, Lampeitl, Hubert, Marshall, Jennifer L, McGinnis, David, Miknaitis, Gajus, Nichol, Robert C, Prieto, Jose Luis, Riess, Adam G, Richmond, Michael W, Schneider, Donald P, Smith, Mathew, Takanashi, Naohiro, Tokita, Kouichi, van der Heyden, Kurt, Yasuda, Naoki, Romer, A Kathy and et al, (2008) First-year spectroscopy for the Sloan Digital Sky Survey-II supernova survey. Astronomical Journal, 135 (5). pp. 1766-1784. ISSN 0004-6256

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Abstract

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.

Item Type: Article
Schools and Departments: School of Mathematical and Physical Sciences > Physics and Astronomy
Depositing User: EPrints Services
Date Deposited: 06 Feb 2012 21:14
Last Modified: 07 Jun 2012 10:22
URI: http://sro.sussex.ac.uk/id/eprint/30429
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