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26 April 2024

» arxiv » 0908.4277

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The Sloan Digital Sky Survey-II: Photometry and Supernova Ia Light Curves from the 2005 data
Jon A. Holtzman ; John Marriner ; Richard Kessler ; Masao Sako ; Ben Dilday ; Joshua A. Frieman ; Donald P. Schneider ; Bruce Bassett ; Andrew Becker ; David Cinabro ; Fritz DeJongh ; Darren L. Depoy ; Mamoru Doi ; Peter M. Garnavich ; Craig J. Hogan ; Saurabh Jha ; Kohki Konishi ; Hubert Lampeitl ; Jennifer L. Marshall ; David McGinnis ; Gajus Miknaitis ; Robert C. Nichol ; Jose Luis Prieto ; Adam G. Reiss ; Michael W. Richmond ; Roger Romani ; Mathew Smith ; Naohiro Takanashi ; Kouichi Tokita ; Kurt van der Heyden ; Naoki Yasuda ; Chen Zheng ;
Date:	28 Aug 2009
Abstract:	We present ugriz light curves for 146 spectroscopically confirmed or spectroscopically probable Type Ia supernovae from the 2005 season of the SDSS-II Supernova survey. The light curves have been constructed using a photometric technique that we call scene modelling, which is described in detail here; the major feature is that supernova brightnesses are extracted from a stack of images without spatial resampling or convolution of the image data. This procedure produces accurate photometry along with accurate estimates of the statistical uncertainty, and can be used to derive photometry taken with multiple telescopes. We discuss various tests of this technique that demonstrate its capabilities. We also describe the methodology used for the calibration of the photometry, and present calibrated magnitudes and fluxes for all of the spectroscopic SNe Ia from the 2005 season.
Source:	arXiv, 0908.4277
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