Mon. Not. R. Astron. Soc., 463, 4490-4515 (2016/December-3)
SPIDERS: the spectroscopic follow-up of X-ray selected clusters of galaxies in SDSS-IV.
CLERC N., MERLONI A., ZHANG Y., FINOGUENOV A., DWELLY T., NANDRA K., COLLINS C., DAWSON K., KNEIB J., ROZO E., RYKOFF E., SADIBEKOVA T., BROWNSTEIN J., LIN Y., RIDL J., SALVATO M., SCHWOPE A., STEINMETZ M., SEO H. and TINKER J.
Abstract (from CDS):
SPIDERS (The SPectroscopic IDentification of eROSITA Sources) is a programme dedicated to the homogeneous and complete spectroscopic follow-up of X-ray active galactic nuclei and galaxy clusters over a large area (∼7500 deg2) of the extragalactic sky. SPIDERS is part of the Sloan Digital Sky Survey (SDSS)-IV project, together with the Extended Baryon Oscillation Spectroscopic Survey and the Time-Domain Spectroscopic Survey. This paper describes the largest project within SPIDERS before the launch of eROSITA: an optical spectroscopic survey of X-ray-selected, massive (∼1014-1015 M☉) galaxy clusters discovered in ROSAT and XMM-Newton imaging. The immediate aim is to determine precise (Δz ∼ 0.001) redshifts for 4000-5000 of these systems out to z ∼ 0.6. The scientific goal of the program is precision cosmology, using clusters as probes of large-scale structure in the expanding Universe. We present the cluster samples, target selection algorithms and observation strategies. We demonstrate the efficiency of selecting targets using a combination of SDSS imaging data, a robust red-sequence finder and a dedicated prioritization scheme. We describe a set of algorithms and work-flow developed to collate spectra and assign cluster membership, and to deliver catalogues of spectroscopically confirmed clusters. We discuss the relevance of line-of-sight velocity dispersion estimators for the richer systems. We illustrate our techniques by constructing a catalogue of 230 spectroscopically validated clusters (0.031 < z < 0.658), found in pilot observations. We discuss two potential science applications of the SPIDERS sample: the study of the X-ray luminosity-velocity dispersion (LX-σ) relation and the building of stacked phase-space diagrams.
© 2016 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society
cosmology: observations - catalogues - galaxies: clusters: general - X-rays: galaxies: clusters - X-rays: galaxies: clusters
Status at CDS:
waiting for electronic table
View the reference in ADS
To bookmark this query, right click on this link: simbad:2016MNRAS.463.4490C and select 'bookmark this link' or equivalent in the popup menu