First-Year Spectroscopy for the SDSS-II Supernova Survey

This paper presents spectroscopy of supernovae discovered in the first season of the Sloan Digital Sky Survey-II Supernova Survey. This program searches for and measures multi-band light curves of supernovae in the redshift range z = 0.05-0.4, complementing existing surveys at lower and higher redsh...

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Bibliographic Details
Published in:The Astronomical journal 2008-03
Main Authors: 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
Format: Article
Language:English
Subjects:
APERTURES
Astrophysics,ASTRO
CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS
CLASSIFICATION
CONTAMINATION
PROBES
SEASONS
SKY
SPECTRA
SPECTROSCOPY
SUPERNOVAE
TARGETS
TELESCOPES
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Summary:This paper presents spectroscopy of supernovae discovered in the first season of the Sloan Digital Sky Survey-II Supernova Survey. This program searches for and measures multi-band light curves of supernovae in the redshift range z = 0.05-0.4, complementing existing surveys at lower and higher redshifts. Our goal is to better characterize the supernova population, with a particular focus on SNe Ia, improving their utility as cosmological distance indicators and as probes of dark energy. Our supernova spectroscopy program features rapid-response observations using telescopes of a range of apertures, and provides confirmation of the supernova 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.
ISSN:0004-6256
1538-3881
DOI:10.1088/0004-6256/135/5/1766