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Date and Time of the Query: 2019-05-20 T08:53:00 PDT
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For refcode 2014MNRAS.443.2342M:
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Copyright by Royal Astronomical Society. 2014MNRAS.443.2342M LoCuSS: hydrostatic mass measurements of the high-L_X_ cluster sample - cross-calibration of Chandra and XMM-Newton Martino, Rossella; Mazzotta, Pasquale; Bourdin, Herve; Smith, Graham P.; Bartalucci, Iacopo; Marrone, Daniel P.; Finoguenov, Alexis; Okabe, Nobuhiro Abstract. We present a consistent analysis of Chandra and XMM-Newton observations of an approximately mass-selected sample of 50 galaxy clusters at 0.15 < z < 0.3 - the 'LoCuSS high-L_X_ sample'. We apply the same analysis methods to data from both satellites, including newly developed analytic background models that predict the spatial variation of the Chandra and XMM-Newton backgrounds to <2 and <5 per cent precision, respectively. To verify the cross-calibration of Chandra- and XMM-Newton-based cluster mass measurements, we derive the mass profiles of the 21 clusters that have been observed with both satellites, extracting surface brightness and temperature profiles from identical regions of the respective data sets. We obtain consistent results for the gas and total hydrostatic cluster masses: the average ratio of Chandra- to XMM-Newton-based measurements of M_gas_ and M_X_ at r_500_ are 0.99 +/- 0.02 and 1.02 +/- 0.05, respectively, with an intrinsic scatter of ~3 per cent for gas masses and ~8 per cent for hydrostatic masses. Comparison of our hydrostatic mass measurements at r_500_ with the latest Local Cluster Substructure Survey (LoCuSS) weak-lensing results indicate that the data are consistent with non-thermal pressure support at this radius of ~7 per cent. We also investigate the scaling relation between our hydrostatic cluster masses and published integrated Compton parameter Y_sph_ measurements from the Sunyaev-Zel'dovich Array. We measure a scatter in mass at fixed Y_sph_ of ~16 per cent at Delta = 500, which is consistent with theoretical predictions of ~10-15 per cent scatter. Key words: galaxies: clusters: general, cosmology: observations, X-rays: galaxies: clusters
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