183 citations · 394 across the 3 of their papers we have counts for
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Chi-square and Poissonian Data: Biases Even in the High-Count Regime and How to Avoid them
Philip J. Humphrey, Wenhao Liu, David A. Buote
We demonstrate that two approximations to the chi^2 statistic as popularly employed by observational astronomers for fitting Poisson-distributed data can give rise to intrinsically…
The X-Ray Concentration-Virial Mass Relation
David A. Buote, Fabio Gastaldello, Philip J. Humphrey +4
We present the concentration (c)-virial mass (M) relation of 39 galaxy systems ranging in mass from individual early-type galaxies up to the most massive galaxy clusters, (0.06-20)…
Probing the Dark Matter and Gas Fraction in Relaxed Galaxy Groups with X-ray observations from Chandra and XMM
Fabio Gastaldello, David A. Buote, Philip J. Humphrey +4
We present radial mass profiles within 0.3 r_vir for 16 relaxed galaxy groups-poor clusters (kT range 1-3 keV) selected for optimal mass constraints from the Chandra and XMM data a…