A new RASS galaxy cluster catalogue with low contamination extending to z similar to 1 in the DES overlap region Academic Article uri icon

abstract

  • ABSTRACT We present the MARD-Y3 catalogue of between 1086 and 2171 galaxy clusters (52percent and 65percent new) produced using multicomponent matched filter (MCMF) follow-up in 5000deg2 of DES-Y3 optical data of the 20000 overlapping ROSAT All-Sky Survey source catalogue (2RXS) X-ray sources. Optical counterparts are identified as peaks in galaxy richness as a function of redshift along the line of sight towards each 2RXS source within a search region informed by an X-ray prior. All peaks are assigned a probability fcont of being a random superposition. The clusters lie at 0.02 > z > 1.1 with more than 100 clusters at z < 0.5. Residual contamination is 2.6percent and 9.6percent for the cuts adopted here. For each cluster we present the optical centre, redshift, rest frame X-ray luminosity, M500 mass, coincidence with NWAY infrared sources, and estimators of dynamical state. About 2percent of MARD-Y3 clusters have multiple possible counterparts, the photo-zs are high quality with z/(1 + z)= 0.0046, and 1percent of clusters exhibit evidence of X-ray luminosity boosting from emission by cluster active galactic nuclei. Comparison with other catalogues (MCXC, RM, SPT-SZ, Planck) is performed to test consistency of richness, luminosity, and mass estimates. We measure the MARD-Y3 X-ray luminosity function and compare it to the expectation from a fiducial cosmology and externally calibrated luminosity- and richnessmass relations. Agreement is good, providing evidence that MARD-Y3 has low contamination and can be understood as a simple two step selection X-ray and then optical of an underlying cluster population described by the halo mass function.

published proceedings

  • MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY

altmetric score

  • 5.08

author list (cited authors)

  • Klein, M., Grandis, S., Mohr, J. J., Paulus, M., Abbott, T., Annis, J., ... Vikram, V.

citation count

  • 35

complete list of authors

  • Klein, M||Grandis, S||Mohr, JJ||Paulus, M||Abbott, TMC||Annis, J||Avila, S||Bertin, E||Brooks, D||Buckley-Geer, E||Rosell, A Carnero||Kind, M Carrasco||Carretero, J||Castander, FJ||Cunha, CE||D’Andrea, CB||da Costa, LN||De Vicente, J||Desai, S||Diehl, HT||Dietrich, JP||Doel, P||Evrard, AE||Flaugher, B||Fosalba, P||Frieman, J||García-Bellido, J||Gaztanaga, E||Giles, PA||Gruen, D||Gruendl, RA||Gschwend, J||Gutierrez, G||Hartley, WG||Hollowood, DL||Honscheid, K||Hoyle, B||James, DJ||Jeltema, T||Kuehn, K||Kuropatkin, N||Lima, M||Maia, MAG||March, M||Marshall, JL||Menanteau, F||Miquel, R||Ogando, RLC||Plazas, AA||Romer, AK||Roodman, A||Sanchez, E||Scarpine, V||Schindler, R||Serrano, S||Sevilla-Noarbe, I||Smith, M||Smith, RC||Soares-Santos, M||Sobreira, F||Suchyta, E||Swanson, MEC||Tarle, G||Thomas, D||Vikram, V

publication date

  • May 2019