THE SDSS-IV EXTENDED BARYON OSCILLATION SPECTROSCOPIC SURVEY: QUASAR TARGET SELECTION

By Adam D. Myers, N. Palanque-Delabrouille, A. Prakash, Iap Paris, C. Yéche, K. Dawson, Jo Bovy, Dustin Lang, David Schlegel, J. Newman and 27 more. 2015

152 citations recorded by the source corpus.

As part of the Sloan Digital Sky Survey (SDSS) IV the extended Baryon Oscillation Spectroscopic Survey (eBOSS) will improve measurements of the cosmological distance scale by applying the Baryon Acoustic Oscillation (BAO) method to quasar samples. eBOSS will adopt two approaches to target quasars over 7500 deg2. First, a “CORE” quasar sample will combine the optical selection in ugriz using a likelihood-based routine called XDQSOz, with a mid-IR-optical color cut. eBOSS CORE selection (to g < 22 or r < 22) should return ∼70 deg−2 quasars at redshifts 0.9 < z < 2.2 and ∼7 deg−2z > 2.1 quasars. Second, a selection based on variability in multi-epoch imaging from the Palomar Transient Factory should recover an additional ∼3–4 deg−2z > 2.1 quasars to g < 22.5. A linear model of how imaging systematics affect target density recovers the angular distribution of eBOSS CORE quasars over 96.7% (76.7%) of the SDSS north (south) Galactic Cap area. The eBOSS CORE quasar sample should thus be sufficiently dense and homogeneous over 0.9 < z < 2.2 to yield the first few-percent-level BAO constraint near z ¯ ∼ 1.5 . ?> eBOSS quasars at z > 2.1 will be used to improve BAO measurements in the Lyα Forest. Beyond its key cosmological goals, eBOSS should be the next-generation quasar survey, comprising >500,000 new quasars and >500,000 uniformly selected spectroscopically confirmed 0.9 < z < 2.2 quasars. At the conclusion of eBOSS, the SDSS will have provided unique spectra for more than 800,000 quasars.

Subfields: Astronomy and Astrophysics

View Paper: https://www.semanticscholar.org/paper/9d66e56499b9269cbc5c323301abc27ba266be35

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Citations in the corpus

The completed SDSS-IV extended Baryon Oscillation Spectroscopic Survey: BAO and RSD measurements from the anisotropic power spectrum of the quasar sample between redshift 0.8 and 2.2 (2020, methodology): “Quasar targets were selected according to the procedure presented in Myers et al. (2015).”
WISE PHOTOMETRY FOR 400 MILLION SDSS SOURCES (2014, methodology): “Myers et al. (2015) describe the use of our results to select quasars, while Prakash et al. (2015) describe the selection of luminous red galaxy (LRG) targets.”
Baryon acoustic oscillations from the cross-correlation of Lyα absorption and quasars in eBOSS DR14 (2019, methodology): “Here, we use in addition data from the first two years of the eBOSS program and the completed SEQUELS.”
The Sloan Digital Sky Survey Quasar Catalog: Twelfth data release (2016, methodology): “The main SEQUELS subsample is based upon the eBOSS quasar survey (Myers et al. 2015): –”
Validation of the Scientific Program for the Dark Energy Spectroscopic Instrument (2023, methodology): “In DESI, we use an alternative approach that relies on flux excess in near-infrared bandpasses instead, as demonstrated in eBOSS (Myers et al. 2015).”
Target Selection and Validation of DESI Quasars (2022, methodology): “In DESI we propose an alternative approach that detects their near-infrared (NIR) excess as already demonstrated in eBOSS (Myers et al. 2015).”
Baryon acoustic oscillations from the complete SDSS-III Ly$\alpha$-quasar cross-correlation function at $z=2.4$ (2017, background): “However, DR12 also includes six months of data from SEQUELS (Myers et al. 2015; Alam et al. 2015), the pilot survey for the eBOSS survey.”
The Sloan Digital Sky Survey Quasar Catalog: Sixteenth Data Release (2020, methodology): “SDSS-III/BOSS and SDSS-IV/eBOSS focused, in part, on studies of the Lyα forest using z>2.2 quasars.”
The clustering of the SDSS-IV extended Baryon Oscillation Spectroscopic Survey DR14 quasar sample: a tomographic measurement of cosmic structure growth and expansion rate based on optimal redshift weights (2018, methodology): “After the eBOSS quasar target selection, which is described in Myers et al. (2015), the spectra are taken using the double-armed spectrographs (Smee et al. 2013), which were used for the BOSS mission, as part of the SDSS-III project (Eisenstein et al. 2011).”
The clustering of the SDSS-IV extended Baryon Oscillation Spectroscopic Survey DR14 quasar sample: measurement of the growth rate of structure from the anisotropic correlation function between redshift 0.8 and 2.2 (2018, methodology): “Quasar target selection (Myers et al. 2015) is based on the SDSS-I–II–III optical imaging data in the ugriz (Fukugita et al. 1996) photometric pass band and on the Wide-field Infrared Survey Explorer (WISE, Wright et al. 2010).”
A systematic search for changing-look quasars in SDSS (2015, unknown): “; Myers et al. 2015).”
Baryon acoustic oscillations at z = 2.34 from the correlations of Lyα absorption in eBOSS DR14 (2019, background): “The quasar target selection is presented in Myers et al. (2015).”
The Completed SDSS-IV Extended Baryon Oscillation Spectroscopic Survey: Baryon Acoustic Oscillations with Lyα Forests (2020, methodology): “…used in this paper (Ahumada et al. 2020) contain the complete 5 yr BOSS sample (Fall 2009–Spring 2014) and the 5 yr eBOSS sample (2014 July–2019 March), including its pilot program SEQUELS (Myers et al. 2015), which began in the final year of SDSS-III and concluded in the first year of SDSS-IV.”
The completed SDSS-IV extended Baryon Oscillation Spectroscopic Survey: BAO and RSD measurements from anisotropic clustering analysis of the quasar sample in configuration space between redshift 0.8 and 2.2 (2020, background): “The quasar target selection is documented in Myers et al. (2015).”