Nine tiny star clusters in Gaia DR1, PS1 and DES
  We present the results of a systematic Milky Way satellite search performed
across an array of publicly available wide-area photometric surveys. Our aim is
to complement previous searches by widening the parameter space covered.
Specifically, we focus on objects smaller than $1'$ and include old, young,
metal poor and metal rich stellar population masks. As a result we find 9 new
likely genuine stellar systems in data from GAIA, DES, and Pan-STARRS, which
were picked from the candidate list because of conspicuous counterparts in the
cut-out images. The presented systems are all very compact ($r_h<1'$) and faint
($M_V\gtrsim-3$), and are associated either with the Galactic disk, or the
Magellanic Clouds. While most of the stellar systems look like Open Clusters,
their exact classification is, as of today, unclear. With these discoveries, we
extend the parameter space occupied by star clusters to sizes and luminosities
previously unexplored and demonstrate that rather than two distinct classes of
Globular and Open clusters, there appears to be a continuity of objects,
unmarked by a clear decision boundary.
