作者
Michael A Strauss, David H Weinberg, Robert H Lupton, Vijay K Narayanan, James Annis, Mariangela Bernardi, Michael Blanton, Scott Burles, AJ Connolly, Julianne Dalcanton, Mamoru Doi, Daniel Eisenstein, Joshua A Frieman, Masataka Fukugita, James E Gunn, Željko Ivezić, Stephen Kent, Rita SJ Kim, GR Knapp, Richard G Kron, Jeffrey A Munn, Heidi Jo Newberg, RC Nichol, Sadanori Okamura, Thomas R Quinn, Michael W Richmond, David J Schlegel, Kazuhiro Shimasaku, Mark SubbaRao, Alexander S Szalay, Dan Vanden Berk, Michael S Vogeley, Brian Yanny, Naoki Yasuda, Donald G York, Idit Zehavi
发表日期
2002/9/1
期刊
The Astronomical Journal
卷号
124
期号
3
页码范围
1810
出版商
IOP Publishing
简介
We describe the algorithm that selects the main sample of galaxies for spectroscopy in the Sloan Digital Sky Survey (SDSS) from the photometric data obtained by the imaging survey. Galaxy photometric properties are measured using the Petrosian magnitude system, which measures flux in apertures determined by the shape of the surface brightness profile. The metric aperture used is essentially independent of cosmological surface brightness dimming, foreground extinction, sky brightness, and the galaxy central surface brightness. The main galaxy sample consists of galaxies with r-band Petrosian magnitudes r≤ 17.77 and r-band Petrosian half-light surface brightnesses μ 50≤ 24.5 mag arcsec-2. These cuts select about 90 galaxy targets per square degree, with a median redshift of 0.104. We carry out a number of tests to show that (1) our star-galaxy separation criterion is effective at eliminating nearly all …
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MA Strauss, DH Weinberg, RH Lupton, VK Narayanan… - The Astronomical Journal, 2002