MCC members hauled in a major amount of JVLA radio observation time in the 2014B semester to study the radio emission of merging clusters. One proposal, led by Will Dawson, will obtain deep (30 total hours) polarization measurements of 5 double radio relic clusters (A1240, MACS J1752.0+4440, RXC J1314.4-2515, ZwCL 0008.8+5215, and ZwCL 2341.1+0000). These observations will enable us to improve dark matter cross-section constraints by almost an order of magnitude! The second proposal, led by Reinout van Weeren, will obtain very deep radio observations (64 hours total) of four of the the Frontier Field clusters (MACS J0717, MACS J1149, MACS J0416, and A2744).
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