Details

Autor(en) / Beteiligte

• Bolton, Adam S
• Schlegel, David J
• Aubourg, Eric
• Bailey, Stephen
• Bhardwaj, Vaishali
• Brownstein, Joel R
• Burles, Scott
• Chen, Yan-Mei
• Dawson, Kyle
• Eisenstein, Daniel J

Titel

SPECTRAL CLASSIFICATION AND REDSHIFT MEASUREMENT FOR THE SDSS-III BARYON OSCILLATION SPECTROSCOPIC SURVEY

Ist Teil von

• The Astronomical journal, 2012-11, Vol.144 (5), p.1-20

Ort / Verlag

American Astronomical Society

Erscheinungsjahr

2012

Link zum Volltext

Quelle

Electronic Journals Library - Freely accessible e-journals

Beschreibungen/Notizen

• We describe the automated spectral classification, redshift determination, and parameter measurement pipeline in use for the Baryon Oscillation Spectroscopic Survey (BOSS) of the Sloan Digital Sky Survey UI (SDSS-III) as of the survey's ninth data release (DR9), encompassing 831,000 moderate-resolution optical spectra. We give a review of the algorithms employed, and describe the changes to the pipeline that have been implemented for BOSS relative to previous SDSS-I/II versions, including new sets of stellar, galaxy, and quasar redshift templates. We test the accuracy of these statistical redshift error estimates using repeat observations, finding them underestimated by a factor of 1.19-1.34 for galaxies and by a factor of two for quasars. We assess the impact of sky-subtraction quality, signal-to-noise ratio, and other factors on galaxy redshift success. Finally, we document known issues with the BOSS DR9 spectroscopic data set and describe directions of ongoing development