Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Campaign 9 of the $K2$ Mission: Observational Parameters, Scientific
  Drivers, and Community Involvement for a Simultaneous Space- and Ground-based
  Microlensing Survey   $K2$'s Campaign 9 ($K2$C9) will conduct a $\sim$3.7 deg$^{2}$ survey toward
the Galactic bulge from 7/April through 1/July of 2016 that will leverage the
spatial separation between $K2$ and the Earth to facilitate measurement of the
microlens parallax $\pi_{\rm E}$ for $\gtrsim$127 microlensing events. These
will include several that are planetary in nature as well as many
short-timescale microlensing events, which are potentially indicative of
free-floating planets (FFPs). These satellite parallax measurements will in
turn allow for the direct measurement of the masses of and distances to the
lensing systems. In this white paper we provide an overview of the $K2$C9
space- and ground-based microlensing survey. Specifically, we detail the
demographic questions that can be addressed by this program, including the
frequency of FFPs and the Galactic distribution of exoplanets, the
observational parameters of $K2$C9, and the array of resources dedicated to
concurrent observations. Finally, we outline the avenues through which the
larger community can become involved, and generally encourage participation in
$K2$C9, which constitutes an important pathfinding mission and community
exercise in anticipation of $WFIRST$.

15
The categories of this paper are: nucl-ex
30
The categories of this paper are: q-alg
37
The categories of this paper are: supr-con
17
The categories of this paper are: q-fin
13
The categories of this paper are: quant-ph
21
The categories of this paper are: adap-org
5
The categories of this paper are: gr-qc
4
The categories of this paper are: cond-mat
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The categories of this paper are: math-ph
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The categories of this paper are: eess
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The categories of this paper are: comp-gas
2
The categories of this paper are: math
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The categories of this paper are: chao-dyn
0
The categories of this paper are: hep-ph
16
The categories of this paper are: stat
25
The categories of this paper are: patt-sol