Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: The VAMPIRES instrument: Imaging the innermost regions of protoplanetary
  disks with polarimetric interferometry   Direct imaging of protoplanetary disks promises to provide key insight into
the complex sequence of processes by which planets are formed. However imaging
the innermost region of such disks (a zone critical to planet formation) is
challenging for traditional observational techniques (such as near-IR imaging
and coronagraphy) due to the relatively long wavelengths involved and the area
occulted by the coronagraphic mask. Here we introduce a new instrument --
VAMPIRES -- which combines non-redundant aperture-masking interferometry with
differential polarimetry to directly image this previously inaccessible
innermost region. By using the polarisation of light scattered by dust in the
disk to provide precise differential calibration of interferometric
visibilities and closure phases, VAMPIRES allows direct imaging at and beyond
the telescope diffraction limit. Integrated into the SCExAO system at the
Subaru telescope, VAMPIRES operates at visible wavelengths (where polarisation
is high) while allowing simultaneous infrared observations conducted by HICIAO.
Here we describe the instrumental design and unique observing technique and
present the results of the first on-sky commissioning observations, validating
the excellent visibility and closure phase precision which are then used to
project expected science performance metrics.

22
The categories of this paper are: chao-dyn
19
The categories of this paper are: eess
20
The categories of this paper are: acc-phys
10
The categories of this paper are: q-bio
0
The categories of this paper are: hep-ph
16
The categories of this paper are: stat
26
The categories of this paper are: bayes-an
3
The categories of this paper are: physics
31
The categories of this paper are: ao-sci
29
The categories of this paper are: funct-an
33
The categories of this paper are: plasm-ph
28
The categories of this paper are: alg-geom
24
The categories of this paper are: dg-ga
15
The categories of this paper are: nucl-ex
32
The categories of this paper are: atom-ph
18
The categories of this paper are: econ