PHOTOMETRIC ESTIMATES OF REDSHIFTS AND DISTANCE MODULI FOR TYPE Ia SUPERNOVAE

Journal Article · Thu Jul 01 00:00:00 EDT 2010 · Astrophysical Journal

DOI:https://doi.org/10.1088/0004-637X/717/1/40· OSTI ID:21452896

Kessler, Richard; Frieman, Joshua A ^[1]; Cinabro, David ^[2]; Bassett, Bruce; Smith, Mathew ^[3]; Dilday, Benjamin; Jha, Saurabh ^[4]; Garnavich, Peter M ^[5]; Marriner, John ^[6]; Nichol, Robert C ^[7]; Sako, Masao ^[8]; Bernstein, Joseph P; Kuhlmann, Stephen ^[9]; Bizyaev, Dmitry ^[10]; Goobar, Ariel ^[11]; Schneider, Donald P ^[12]; Stritzinger, Maximilian ^[13]

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1. Department of Astronomy and Astrophysics, University of Chicago, 5640 South Ellis Avenue, Chicago, IL 60637 (United States)
2. Department of Physics and Astronomy, Wayne State University, Detroit, MI 48202 (United States)
3. Department of Mathematics and Applied Mathematics, University of Cape Town, Rondebosch 7701 (South Africa)
4. Department of Physics and Astronomy, Rutgers University, 136 Frelinghuysen Road, Piscataway, NJ 08854 (United States)
5. University of Notre Dame, 225 Nieuwland Science, Notre Dame, IN 46556-5670 (United States)
6. Center for Particle Astrophysics, Fermi National Accelerator Laboratory, P.O. Box 500, Batavia, IL 60510 (United States)
7. Institute of Cosmology and Gravitation, Mercantile House, Hampshire Terrace, University of Portsmouth, Portsmouth PO1 2EG (United Kingdom)
8. Department of Physics and Astronomy, University of Pennsylvania, 203 South 33rd Street, Philadelphia, PA 19104 (United States)
9. Argonne National Laboratory, 9700 S. Cass Avenue, Lemont, IL 60437 (United States)
10. Apache Point Observatory, P.O. Box 59, Sunspot, NM 88349 (United States)
11. Department of Physics, Stockholm University, Albanova University Center, SE-106 91 Stockholm (Sweden)
12. Department of Astronomy and Astrophysics, The Pennsylvania State University, 525 Davey Laboratory, University Park, PA 16802 (United States)
13. Las Campanas Observatory, Carnegie Observatories, Casilla 601, La Serena (Chile)

Large planned photometric surveys will discover hundreds of thousands of supernovae (SNe), outstripping the resources available for spectroscopic follow-up and necessitating the development of purely photometric methods to exploit these events for cosmological study. We present a light curve fitting technique for type Ia supernova (SN Ia) photometric redshift (photo-z) estimation in which the redshift is determined simultaneously with the other fit parameters. We implement this 'LCFIT+Z' technique within the frameworks of the MLCS2K2 and SALTII light curve fit methods and determine the precision on the redshift and distance modulus. This method is applied to a spectroscopically confirmed sample of 296 SNe Ia from the Sloan Digital Sky Survey-II (SDSS-II) SN Survey and 37 publicly available SNe Ia from the Supernova Legacy Survey (SNLS). We have also applied the method to a large suite of realistic simulated light curves for existing and planned surveys, including the SDSS, SNLS, and the Large Synoptic Survey Telescope. When intrinsic SN color fluctuations are included, the photo-z precision for the simulation is consistent with that in the data. Finally, we compare the LCFIT+Z photo-z precision with previous results using color-based SN photo-z estimates.

• OSTI ID: 21452896
• Journal Information: Astrophysical Journal, Vol. 717, Issue 1; Other Information: DOI: 10.1088/0004-637X/717/1/40; ISSN 0004-637X
• Country of Publication: United States
• Language: English

Related Subjects

79 ASTROPHYSICS
COSMOLOGY AND ASTRONOMY
COLOR
DATA ANALYSIS
PHOTOMETRY
RED SHIFT
SIMULATION
SUPERNOVAE
TELESCOPES
BINARY STARS
ERUPTIVE VARIABLE STARS
OPTICAL PROPERTIES
ORGANOLEPTIC PROPERTIES
PHYSICAL PROPERTIES
STARS
VARIABLE STARS