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arXiv · 1401.3317

The Data Release of the Sloan Digital Sky Survey-II Supernova Survey

Masao Sako·Bruce Bassett·Andrew C. Becker·Peter J. Brown·Heather Campbell·Rachel Cane·David Cinabro·Chris B. D'Andrea·Kyle S. Dawson·Fritz DeJongh·Darren L. Depoy·Ben Dilday·Mamoru Doi·Alexei V. Filippenko·John A. Fischer·Ryan J. Foley·Joshua A. Frieman·Lluis Galbany·Peter M. Garnavich·Ariel Goobar·Ravi R. Gupta·Gary J. Hill·Brian T. Hayden·Renee Hlozek·Jon A. Holtzman·Ulrich Hopp·Saurabh W. Jha·Richard Kessler·Wolfram Kollatschny·Giorgos Leloudas·John Marriner·Jennifer L. Marshall·Ramon Miquel·Tomoki Morokuma·Jennifer Mosher·Robert C. Nichol·Jakob Nordin·Matthew D. Olmstead·Linda Ostman·Jose L. Prieto·Michael Richmond·Roger W. Romani·Jesper Sollerman·Max Stritzinger·Donald P. Schneider·Mathew Smith·J. Craig Wheeler·Naoki Yasuda·Chen Zheng
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Abstract

This paper describes the data release of the Sloan Digital Sky Survey-II (SDSS-II) Supernova Survey conducted between 2005 and 2007. Light curves, spectra, classifications, and ancillary data are presented for 10,258 variable and transient sources discovered through repeat ugriz imaging of SDSS Stripe 82, a 300 deg2 area along the celestial equator. This data release is comprised of all transient sources brighter than r~22.5 mag with no history of variability prior to 2004. Dedicated spectroscopic observations were performed on a subset of 889 transients, as well as spectra for thousands of transient host galaxies using the SDSS-III BOSS spectrographs. Photometric classifications are provided for the candidates with good multi-color light curves that were not observed spectroscopically. From these observations, 4607 transients are either spectroscopically confirmed, or likely to be, supernovae, making this the largest sample of supernova candidates ever compiled. We present a new method for SN host-galaxy identification and derive host-galaxy properties including stellar masses, star-formation rates, and the average stellar population ages from our SDSS multi-band photometry. We derive SALT2 distance moduli for a total of 1443 SN Ia with spectroscopic redshifts as well as photometric redshifts for a further 677 purely-photometric SN Ia candidates. Using the spectroscopically confirmed subset of the three-year SDSS-II SN Ia sample and assuming a flat Lambda-CDM cosmology, we determine Omega_M = 0.315 +/- 0.093 (statistical error only) and detect a non-zero cosmological constant at 5.7 sigmas.

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Masao Sako, Bruce Bassett, Andrew C. Becker, Peter J. Brown, Heather Campbell, Rachel Cane, David Cinabro, Chris B. D'Andrea, Kyle S. Dawson, Fritz DeJongh, Darren L. Depoy, Ben Dilday, Mamoru Doi, Alexei V. Filippenko, John A. Fischer, Ryan J. Foley, Joshua A. Frieman, Lluis Galbany, Peter M. Garnavich, Ariel Goobar, Ravi R. Gupta, Gary J. Hill, Brian T. Hayden, Renee Hlozek, Jon A. Holtzman, Ulrich Hopp, Saurabh W. Jha, Richard Kessler, Wolfram Kollatschny, Giorgos Leloudas, John Marriner, Jennifer L. Marshall, Ramon Miquel, Tomoki Morokuma, Jennifer Mosher, Robert C. Nichol, Jakob Nordin, Matthew D. Olmstead, Linda Ostman, Jose L. Prieto, Michael Richmond, Roger W. Romani, Jesper Sollerman, Max Stritzinger, Donald P. Schneider, Mathew Smith, J. Craig Wheeler, Naoki Yasuda, Chen Zheng. 2014-01-14. The Data Release of the Sloan Digital Sky Survey-II Supernova Survey. https://doi.org/10.1088/1538-3873%2Faab4e0

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