Exploring the consequences of chromatic data excision in 21-cm Epoch of
  Reionization power spectrum observations
  We explore how chromatic RFI flags affect 21-cm power spectrum measurements.
We particularly study flags that are coarser than the analysis resolution. We
find that such RFI flags produce excess power in the EoR window in much the
same way as residual RFI. We use Fast Holographic Deconvolution (FHD)
simulations to explain this as a result of chromatic disruptions in the
interferometric sampling function of the array. We also use these simulations
in conjunction with Error Propagated Power Spectrum with InterLeaved Observed
Noise ($\varepsilon$ppsilon) to show that without modifying current flagging
strategies or implementing extremely accurate and complete foreground
subtraction, 21-cm EoR experiments will fail to make a significant detection.
As a mitigation strategy, we find that circumventing the chromatic structure
altogether by flagging the entire analysis band when RFI is detected is simple
to implement and highly successful. This demands a detection strategy with a
low false positive rate in order to prevent excessive data loss.
