Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Performance Analysis of Differential Speckle Polarimetry   We consider a method for obtaining information on polarization of
astronomical objects radiation at diffraction limited resolution - differential
speckle polarimetry. As an observable we propose to use averaged cross spectrum
of two short-exposure images corresponding to orthogonal polarizations,
normalized by averaged power spectrum of one of images. Information on
polarization can be extracted if object under study can be described by model
with several parameters. We consider two examples: point-like source whose
photocenter position depends on orientation of passing polarization and
exozodiacal dust disc around a star. In first case difference between
photocenter positions can be measured with precision of 8 mirco-arcseconds for
2.5-m telescope and 1.2 micro-arcseconds for 6-m telescope for object V=13. For
second example method allows detection of discs around central star of V=1 with
fractional luminosities of 1.8E-5 and 5.6E-6 for 2.5-m and 6-m telescope,
respectively.

15
The categories of this paper are: nucl-ex
16
The categories of this paper are: stat
31
The categories of this paper are: ao-sci
22
The categories of this paper are: chao-dyn
13
The categories of this paper are: quant-ph
35
The categories of this paper are: mtrl-th
7
The categories of this paper are: hep-th
10
The categories of this paper are: q-bio
19
The categories of this paper are: eess
30
The categories of this paper are: q-alg
8
The categories of this paper are: hep-ex
34
The categories of this paper are: chem-ph
4
The categories of this paper are: cond-mat
21
The categories of this paper are: adap-org
12
The categories of this paper are: nucl-th
27
The categories of this paper are: comp-gas