Cited by 573Galaxies: Formation, Evolution, PhenomenaAstronomy and Astrophysical ResearchStellar, planetary, and galactic studies

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IMPROVED BACKGROUND SUBTRACTION FOR THE SLOAN DIGITAL SKY SURVEY IMAGES

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Abstract

We describe a procedure for background subtracting Sloan Digital Sky Survey (SDSS) imaging that improves the resulting detection and photometry of large galaxies on the sky. Within each SDSS drift scan run, we mask out detected sources and then fit a smooth function to the variation of the sky background. This procedure has been applied to all SDSS-III Data Release 8 images, and the results are available as part of that data set. We have tested the effect of our background subtraction on the photometry of large galaxies by inserting fake galaxies into the raw pixels, reanalyzing the data, and measuring them after background subtraction. Our technique results in no size-dependent bias in galaxy fluxes up to half-light radii r 50 ∼ 100 arcsec; in contrast, for galaxies of that size the standard SDSS photometric catalog underestimates fluxes by about 1.5 mag. Our results represent a substantial improvement over the standard SDSS catalog results and should form the basis of any analysis of nearby galaxies using the SDSS imaging data.

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Research works printed but not linked: 27

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Metadata

Authors
Blanton, M. R., Kazin, E., Muna, D., Weaver, B. A., & Price-Whelan, A.
Affiliations
New York University (US)
Venue
The Astronomical Journal
Published
2011-06-14
Volume
142
Issue
1
Pages
31
ISSN
  • 0004-6256 (ISSN-L)
  • 1538-3881
OpenAlex
W2128886718
Cited by
573
References
2
Citations by year
2026: 34 · 2025: 47 · 2024: 62 · 2023: 46 · 2022: 57 · 2021: 43 · 2020: 61 · 2019: 46 · 2018: 43 · 2017: 36 · 2016: 30 · 2015: 14 · 2014: 22 · 2013: 17 · 2012: 11
FWCI
9.17
Type
journal article
Language
en
Open access
Locations
  • The Astronomical Journal (publishedVersion)
  • arXiv (Cornell University) (submittedVersion)
  • Swinburne figshare (Swinburne University of Technology) (submittedVersion)
  • arXiv (Cornell University)
Funders
  • National Science Foundation (NCC5-626)
  • U.S. Department of Energy
  • National Aeronautics and Space Administration (NNX09AC95G, NNX09AC85G)
  • Alfred P. Sloan Foundation
  • Yale University
  • Vanderbilt University
  • Princeton University
  • Ohio State University
  • California Institute of Technology
  • University of Washington
  • Johns Hopkins University
  • University of Portsmouth
  • New Mexico State University
  • York University
  • Jet Propulsion Laboratory
  • College of Engineering, Michigan State University
  • Brookhaven National Laboratory
  • Lawrence Berkeley National Laboratory
Topics
  • Physical Sciences › Physics and Astronomy › Astronomy and Astrophysics › Galaxies: Formation, Evolution, Phenomena
  • Physical Sciences › Physics and Astronomy › Instrumentation › Astronomy and Astrophysical Research
  • Physical Sciences › Physics and Astronomy › Astronomy and Astrophysics › Stellar, planetary, and galactic studies
Keywords
background subtraction, galaxy photometry, flux bias, photometric catalog, nearby galaxies

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