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Table 6

Comparison of the constraints on the velocity of each subclusters in MACS J0717.5+3745.

Subcluster vz (km s-1)

Galaxies Gas (kSZ) Gas (kSZ) Gas (kSZ) Gas (kSZ)
Optical (Ma et al. 2009) “Model” (Sayers et al. 2013) "Direct" (Sayers et al. 2013) NIKA (F1) NIKA (F2)

B 3450 ± 900 2550 ± 1050

Notes. The NIKA results do not include calibration uncertainties or errors in the X-ray temperature of each subcluster. In addition, as discussed in the text, given the limitation of the models to describe the cluster, we stress that the error bars do not necessarily reflect the true underlying uncertainties.

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