Photometric Redshifts for the SDSS Early Data Release

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dc.creatorCsabai, Istvan
dc.creatorBudavari, Tamas
dc.creatorConnolly, Andrew J.
dc.creatorSzalay, Alexander S.
dc.creatorGyory, Zsuzsanna
dc.creatorBenitez, Narciso
dc.creatorAnnis, Jim
dc.creatorBrinkmann, Jon
dc.creatorEisenstein, Daniel
dc.creatorFukugita, Masataka
dc.creatorGunn, Jim
dc.creatorKent, Stephen
dc.creatorLupton, Robert
dc.creatorNichol, Robert C.
dc.creatorStoughton, Chris
dc.date2002-11-05
dc.date.accessioned2026-07-07T11:08:08Z
dc.date.available2026-07-07T11:08:08Z
dc.descriptionThe Early Data Release from the Sloan Digital Sky survey provides one of the largest multicolor photometric catalogs currently available to the astronomical community. In this paper we present the first application of photometric redshifts to the $\sim 6$ million extended sources within these data (with 1.8 million sources having $r' < 21$). Utilizing a range of photometric redshift techniques, from empirical to template and hybrid techniques, we investigate the statistical and systematic uncertainties present within the redshift estimates for the EDR data. For $r'<21$ we find that the redshift estimates provide realistic redshift histograms with an rms uncertainty in the photometric redshift relation of 0.035 at $r'<18$ and rising to 0.1 at $r'<21$. We conclude by describing how these photometric redshifts and derived quantities, such as spectral type, restframe colors and absolute magnitudes, are stored within the SDSS database. We provide sample queries for searching on photometric redshifts and list the current caveats and issues that should be understood before using these photometric redshifts in statistical analyses of the SDSS galaxies.
dc.description33 pages, 16 figures
dc.identifierhttps://arxiv.org/abs/astro-ph/0211080
dc.identifierhttp://arxiv.org/abs/astro-ph/0211080
dc.identifierAstron.J.125:580,2003
dc.identifierdoi:10.1086/345883
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/190037
dc.subjectAstrophysics
dc.titlePhotometric Redshifts for the SDSS Early Data Release
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