2020MNRAS.498..771G

Query : 2020MNRAS.498..771G

2020MNRAS.498..771G - Mon. Not. R. Astron. Soc., 498, 771-798 (2020/October-2)

Validation of selection function, sample contamination and mass calibration in galaxy cluster samples.

GRANDIS S., KLEIN M., MOHR J.J., BOCQUET S., PAULUS M., ABBOTT T.M.C., AGUENA M., ALLAM S., ANNIS J., BENSON B.A., BERTIN E., BHARGAVA S., BROOKS D., BURKE D.L., CARNERO ROSELL A., CARRASCO KIND M., CARRETERO J., CAPASSO R., COSTANZI M., DA COSTA L.N., DE VICENTE J., DESAI S., DIETRICH J.P., DOEL P., EIFLER T.F., EVRARD A.E., FLAUGHER B., FOSALBA P., FRIEMAN J., GARCIA-BELLIDO J., GAZTANAGA E., GERDES D.W., GRUEN D., GRUENDL R.A., GSCHWEND J., GUTIERREZ G., HARTLEY W.G., HINTON S.R., HOLLOWOOD D.L., HONSCHEID K., JAMES D.J., JELTEMA T., KUEHN K., KUROPATKIN N., LIMA M., MAIA M.A.G., MARSHALL J.L., MELCHIOR P., MENANTEAU F., MIQUEL R., OGANDO R.L.C., PALMESE A., PAZ-CHINCHON F., PLAZAS A.A., ROMER A.K., ROODMAN A., SANCHEZ E., SARO A., SCARPINE V., SCHUBNELL M., SERRANO S., SHELDON E., SMITH M., STARK A.A., SUCHYTA E., SWANSON M.E.C., TARLE G., THOMAS D., TUCKER D.L., VARGA T.N., WELLER J. and WILKINSON R.

Abstract (from CDS):

We construct and validate the selection function of the MARD-Y3 galaxy cluster sample. This sample was selected through optical follow-up of the 2nd ROSAT faint source catalogue with Dark Energy Survey year 3 data. The selection function is modelled by combining an empirically constructed X-ray selection function with an incompleteness model for the optical follow-up. We validate the joint selection function by testing the consistency of the constraints on the X-ray flux-mass and richness-mass scaling relation parameters derived from different sources of mass information: (1) cross-calibration using South Pole Telescope Sunyaev-Zel'dovich (SPT-SZ) clusters, (2) calibration using number counts in X-ray, in optical and in both X-ray and optical while marginalizing over cosmological parameters, and (3) other published analyses. We find that the constraints on the scaling relation from the number counts and SPT-SZ cross-calibration agree, indicating that our modelling of the selection function is adequate. Furthermore, we apply a largely cosmology independent method to validate selection functions via the computation of the probability of finding each cluster in the SPT-SZ sample in the MARD-Y3 sample and vice versa. This test reveals no clear evidence for MARD-Y3 contamination, SPT-SZ incompleteness or outlier fraction. Finally, we discuss the prospects of the techniques presented here to limit systematic selection effects in future cluster cosmological studies.

Abstract Copyright: © 2020 The Author(s) Published by Oxford University Press on behalf of the Royal Astronomical Society

Journal keyword(s): methods: statistical - galaxies: clusters: general - large-scale structure of Universe - X-rays: galaxies: clusters

Simbad objects: 7

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Number of rows : 7
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 ACT-CL J0218.1-4233 ClG 02 18 11.4792 -42 33 03.787           ~ 7 0
2 MARD J032414.5-623537 ClG 03 24 12.240 -62 35 55.80           ~ 27 0
3 ACO 3128 ClG 03 29 50.6 -52 34 48           ~ 183 3
4 ACT-CL J0330.9-5228 ClG 03 30 56.3 -52 28 19           ~ 53 0
5 PSZSPT J2331-5052 ClG 23 31 51 -50 51.9           ~ 53 0
6 MARD J233146.5-505227 ClG 23 32 05.988 -50 53 05.50           ~ 15 0
7 MARD J235854.0-612930 ClG 23 58 46.382 -61 29 07.79           ~ 9 0

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