We describe updates to the redMaPPer algorithm, a photometric red-sequence cluster finder specifically designed for large photometric surveys. The updated algorithm is applied to 150 {{deg}}2 of Science Verification (SV) data from the Dark Energy Survey (DES), and to the Sloan Digital Sky Survey (SDSS) DR8 photometric data set. The DES SV catalog is locally volume limited and contains 786 clusters with richness λ gt 20 (roughly equivalent to {M}{{500c}}≳ {10}14 {h}70-1 {M}☉ ) and 0.2lt zlt 0.9. The DR8 catalog consists of 26,311 clusters with 0.08lt zlt 0.6, with a sharply increasing richness threshold as a function of redshift for z≳ 0.35. The photometric redshift performance of both catalogs is shown to be excellent, with photometric redshift uncertainties controlled at the {σ }z/(1+z)∼ 0.01 level for z≲ 0.7, rising to ∼0.02 at z∼ 0.9 in DES SV. We make use of Chandra and XMM X-ray and South Pole Telescope Sunyaev-Zeldovich data to show that the centering performance and mass-richness scatter are consistent with expectations based on prior runs of redMaPPer on SDSS data. We also show how the redMaPPer photo-z and richness estimates are relatively insensitive to imperfect star/galaxy separation and small-scale star masks.

THE REDMAPPER GALAXY CLUSTER CATALOG from des SCIENCE VERIFICATION DATA

Saro, A.;
2016-01-01

Abstract

We describe updates to the redMaPPer algorithm, a photometric red-sequence cluster finder specifically designed for large photometric surveys. The updated algorithm is applied to 150 {{deg}}2 of Science Verification (SV) data from the Dark Energy Survey (DES), and to the Sloan Digital Sky Survey (SDSS) DR8 photometric data set. The DES SV catalog is locally volume limited and contains 786 clusters with richness λ gt 20 (roughly equivalent to {M}{{500c}}≳ {10}14 {h}70-1 {M}☉ ) and 0.2lt zlt 0.9. The DR8 catalog consists of 26,311 clusters with 0.08lt zlt 0.6, with a sharply increasing richness threshold as a function of redshift for z≳ 0.35. The photometric redshift performance of both catalogs is shown to be excellent, with photometric redshift uncertainties controlled at the {σ }z/(1+z)∼ 0.01 level for z≲ 0.7, rising to ∼0.02 at z∼ 0.9 in DES SV. We make use of Chandra and XMM X-ray and South Pole Telescope Sunyaev-Zeldovich data to show that the centering performance and mass-richness scatter are consistent with expectations based on prior runs of redMaPPer on SDSS data. We also show how the redMaPPer photo-z and richness estimates are relatively insensitive to imperfect star/galaxy separation and small-scale star masks.
File in questo prodotto:
File Dimensione Formato  
Rykoff_2016_ApJS_224_1.pdf

Accesso chiuso

Tipologia: Documento in Versione Editoriale
Licenza: Copyright Editore
Dimensione 1.71 MB
Formato Adobe PDF
1.71 MB Adobe PDF   Visualizza/Apri   Richiedi una copia
2962580_Rykoff_2016_ApJS_224_1-PostPrint.pdf

accesso aperto

Descrizione: PostPrint VQR3
Tipologia: Bozza finale post-referaggio (post-print)
Licenza: Digital Rights Management non definito
Dimensione 1.61 MB
Formato Adobe PDF
1.61 MB Adobe PDF Visualizza/Apri
Pubblicazioni consigliate

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11368/2962580
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 228
  • ???jsp.display-item.citation.isi??? 206
social impact