Spatial variations of galaxy number counts in the Sloan Digital Sky Survey. I. Extinction, large-scale structure, and photometric homogeneity

Masataka Fukugita, Naoki Yasuda, Jon Brinkmann, James E. Gunn, Zeljko Ivezić, Gillian R. Knapp, Robert Lupton, Donald P. Schneider

Research output: Contribution to journalArticle

16 Citations (Scopus)

Abstract

We study the spatial variation of galaxy number counts using five-band photometric images from the Sloan Digital Sky Survey (SDSS). The spatial variation of this sample of 4.3 million galaxies collected from 2200 deg 2 can be understood as the combination of Galactic extinction and large-scale clustering. With the use of the reddening map of Schlegel, Finkbeiner, & Davis, the standard extinction law is verified for the color bands from u to z within 5% in the region of small extinction values, E(B-V) < 0.15. The residual spatial variation of the number counts suggests that the error in the global calibration for SDSS photometry is smaller than 0.02 mag.

Original languageEnglish (US)
Pages (from-to)3155-3160
Number of pages6
JournalAstronomical Journal
Volume127
Issue number6 1782
DOIs
StatePublished - Jun 1 2004

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homogeneity
extinction
spatial variation
galaxies
photometry
calibration
color

All Science Journal Classification (ASJC) codes

  • Astronomy and Astrophysics
  • Space and Planetary Science

Cite this

Fukugita, Masataka ; Yasuda, Naoki ; Brinkmann, Jon ; Gunn, James E. ; Ivezić, Zeljko ; Knapp, Gillian R. ; Lupton, Robert ; Schneider, Donald P. / Spatial variations of galaxy number counts in the Sloan Digital Sky Survey. I. Extinction, large-scale structure, and photometric homogeneity. In: Astronomical Journal. 2004 ; Vol. 127, No. 6 1782. pp. 3155-3160.
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Spatial variations of galaxy number counts in the Sloan Digital Sky Survey. I. Extinction, large-scale structure, and photometric homogeneity. / Fukugita, Masataka; Yasuda, Naoki; Brinkmann, Jon; Gunn, James E.; Ivezić, Zeljko; Knapp, Gillian R.; Lupton, Robert; Schneider, Donald P.

In: Astronomical Journal, Vol. 127, No. 6 1782, 01.06.2004, p. 3155-3160.

Research output: Contribution to journalArticle

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