with double-peaked redshift PDFs). For now we have not prioritized based on redshift uncertainty; however, as the survey progresses and the color map is filled in we may incorporate this quantity.

Estimating Required Instruments & Exposure Times
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A crucial element of the C3R2 survey is the use of best-fit spectral templates to the galaxies to predict the exposure times with different instruments needed to obtain a secure redshift. If we then fail to obtain a redshift under nominal observing conditions we can prioritize the target further for follow-up. This potential re-targeting is important to avoid systematic biases in the redshifts obtained in different parts of color space.

We use a technique developed for the proposed SPHEREx mission [@Dore14; @Stickley16] to predict the spectrum of galaxies based on their broadband photometry. In brief, this method fits a set of templates based on the libraries of @Brown14 (for galaxies) and @Salvato09 (for AGN) to deep multiband photometry. Based on the analysis in @Stickley16, we can estimate the continuum to within 20% and the emission line strengths to within a factor of two. We then use the instrumental response curves for each telescope and instrument to estimate the required integration time to 