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Table 1.

Mach number and the shock radius estimates for the Coma relic.

Reference Mach rs [′]
X-rays, Akamatsu et al. (2013) 2.2 ± 0.5
X-rays, Ogrean & Brüggen (2013)
SZ, Erler et al. (2015)
SZ, Basu et al. (2016) 2.2 ± 0.3 75 (fixed)
X-rays, SRG/eROSITA 1.9 ± 0.2 79 ± 2

Notes. For SRG/eROSITA, quoted uncertainties correspond to estimated systematic errors, driven, in particular, by the freedom in choosing the radial range for fitting. The derived Mach number assumes that the curvature radius of the front is equal to the relic distance from the Coma center.

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