The WaZP galaxy cluster sample of the Dark Energy Survey Year 1
  We present a new (2+1)D galaxy cluster finder based on photometric redshifts
called Wavelet Z Photometric (WaZP) applied to DES first year (Y1A1) data. The
results are compared to clusters detected by the South Pole Telescope (SPT)
survey and the redMaPPer cluster finder, the latter based on the same
photometric data. WaZP searches for clusters in wavelet-based density maps of
galaxies selected in photometric redshift space without any assumption on the
cluster galaxy populations. The comparison to other cluster samples was
performed with a matching algorithm based on angular proximity and redshift
difference of the clusters. It led to the development of a new approach to
match two optical cluster samples, following an iterative approach to minimize
incorrect associations. The WaZP cluster finder applied to DES Y1A1 galaxy
survey (1,511 deg2 up to i=23 mag) led to the detection of 60,547 galaxy
clusters with redshifts 0.05<z<0.9 and richness Ngals>5. Considering the
overlapping regions and redshift ranges between the DES Y1A1 and SPT cluster
surveys, all SZ based SPT clusters are recovered by the WaZP sample.The
comparison between WaZP and redMaPPer cluster samples showed an excellent
overall agreement for clusters with richness Ngals ({\lambda} for redMaPPer)
greater than 25 (20), with 95% recovery on both directions. Based on the
cluster cross-match we explorethe relative fragmentation of the two cluster
samples and investigate the possible signatures of unmatched clusters.
