First-Year Spectroscopy for the SDSS-II Supernova Survey
Abstract
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.
Cite
@article{arxiv.0802.3220,
title = {First-Year Spectroscopy for the SDSS-II Supernova Survey},
author = {Chen Zheng and Roger W. Romani and Masao Sako and John Marriner and Bruce Bassett and Andrew Becker and Changsu Choi and David Cinabro and Fritz DeJongh and Darren L. Depoy and Ben Dilday and Mamoru Doi and Joshua A. Frieman and Peter M. Garnavich and Craig J. Hogan and Jon Holtzman and Myungshin Im and Saurabh Jha and Richard Kessler and Kohki Konishi and Hubert Lampeitl and Jennifer L. Marshall and David McGinnis and Gajus Miknaitis and Robert C. Nichol and Jose Luis Prieto and Adam G. Riess and Michael W. Richmond and Donald P. Schneider and Mathew Smith and Naohiro Takanashi and Kouichi Tokita and Kurt van der Heyden and Naoki Yasuda and Roberto J. Assef and John Barentine and Ralf Bender and Roger D. Blandford and Malcolm Bremer and Howard Brewington and Chris A. Collins and Arlin Crotts and Jack Dembicky and Jason Eastman and Alastair Edge and Ed Elson and Michael E. Eyler and Alexei V. Filippenko and Ryan J. Foley and Stephan Frank and Ariel Goobar and Michael Harvanek and Ulrich Hopp and Yutaka Ihara and Steven Kahn and William Ketzeback and Scott J. Kleinman and Wolfram Kollatschny and Jurek Krzesiński and Giorgos Leloudas and Daniel C. Long and John Lucey and Elena Malanushenko and Viktor Malanushenko and Russet J. McMillan and Christopher W. Morgan and Tomoki Morokuma and Atsuko Nitta and Linda Ostman and Kaike Pan and A. Kathy Romer and Gabrelle Saurage and Katie Schlesinger and Stephanie A. Snedden and Jesper Sollerman and Maximilian Stritzinger and Linda C. Watson and Shannon Watters and J. Craig Wheeler and Donald York},
journal= {arXiv preprint arXiv:0802.3220},
year = {2008}
}
Comments
Accepted for publication in The Astronomical Journal(47pages, 9 figures)