Delubac, T;
Raichoor, A;
Comparat, J;
Jouvel, S;
Kneib, J-P;
Yeche, C;
Zou, H;
... Zhu, G; + view all
(2017)
The SDSS-IV eBOSS: emission line galaxy catalogues at z approximate to 0.8 and study of systematic errors in the angular clustering.
Monthly Notices of the Royal Astronomical Society
, 465
(2)
pp. 1831-1846.
10.1093/mnras/stw2741.
Preview |
Text
Abdalla_stw2741.pdf - Published Version Download (4MB) | Preview |
Abstract
We present two wide-field catalogues of photometrically selected emission line galaxies (ELGs) at z ≈ 0.8 covering about 2800 deg2over the south galactic cap. The catalogues were obtained using a Fisher discriminant technique described in a companion paper. The two catalogues differ by the imaging used to define the Fisher discriminant: the first catalogue includes imaging from the Sloan Digital Sky Survey and the Wide-field InfraredSurvey Explorer, the second also includes information from the South Galactic Cap U-band Sky Survey. Containing respectively 560 045 and 615 601 objects, they represent the largest ELG catalogues available today and were designed for the ELG programme of the extended Baryon Oscillation Spectroscopic Survey (eBOSS). We study potential sources of systematic variation in the angular distribution of the selected ELGs due to fluctuations of the observational parameters. We model the influence of the observational parameters using a multivariate regression and implement a weighting scheme which allows effective removal of all of the systematic errors induced by the observational parameters. We show that fluctuations in the imaging zero-points of the photometric bands have minor impact on the angular distribution of objects in our catalogues. We compute the angular clustering of both catalogues and show that our weighting procedure effectively removes spurious clustering on large scales. We fit a model to the small-scale angular clustering, showing that the selections have similar biases of 1.35/Da(z) and 1.28/Da(z). Both catalogues are publicly available.
| Type: | Article |
|---|---|
| Title: | The SDSS-IV eBOSS: emission line galaxy catalogues at z approximate to 0.8 and study of systematic errors in the angular clustering |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1093/mnras/stw2741 |
| Publisher version: | http://dx.doi.org/10.1093/mnras/stw2741 |
| Language: | English |
| Additional information: | This article has been accepted for publication in Monthly Notices of the Royal Astronomical Society © 2016 The Authors. Published by Oxford University Press on behalf of the Royal Astronomical Society. |
| Keywords: | Science & Technology, Physical Sciences, Astronomy & Astrophysics, methods: data analysis, catalogues, galaxies: distances and redshifts, galaxies: general, galaxies: photometry, cosmology: observations, OSCILLATION SPECTROSCOPIC SURVEY, DIGITAL SKY SURVEY, BARYON ACOUSTIC-OSCILLATIONS, POWER-SPECTRUM, COSMOLOGICAL IMPLICATIONS, TARGET SELECTION, REDSHIFT SURVEY, DATA RELEASE, UNCERTAINTIES, PHOTOMETRY |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Physics and Astronomy |
| URI: | https://discovery.ucl.ac.uk/id/eprint/1540055 |
Archive Staff Only
 |
View Item |
