naa a22 4500 510790275 CHVBK 20180411083317.0 cr unu---uuuuu 180411e20130401xx s 000 0 eng 10.1134/S106377371304004X doi (NATIONALLICENCE)springer-10.1134/S106377371304004X Safonov B. Sternberg Astronomical Institute of Lomonosov Moscow State University, Universitetskii pr. 13, Moscow, Russia aut Performance analysis of differential speckle polarimetry [Elektronische Daten] [B. Safonov] 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: pointlike source whose photocenter position depends on orientation of passing polarization and exozodiacal dust disc around a star. In first case the difference between photocenter positions can be measured with precision of 8 µas for 2.5-m telescope and 1.2 µas for 6-m telescope for object V = 13 m . For second example method allows detection of discs around central star of V = 1 m with fractional luminosities of 1.8 × 10−5 and 5.6 × 10−6 for 2.5- and 6-m telescope, respectively. Pleiades Publishing, Ltd., 2013 speckle interferometry nationallicence polarimetry nationallicence Astronomy Letters SP MAIK Nauka/Interperiodica 39/4(2013-04-01), 237-250 1063-7737 39:4<237 2013 39 11443 https://doi.org/10.1134/S106377371304004X text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1134/S106377371304004X text/html Onlinezugriff via DOI NATIONALLICENCE 100 1- Safonov B. Sternberg Astronomical Institute of Lomonosov Moscow State University, Universitetskii pr. 13, Moscow, Russia aut NATIONALLICENCE 773 0- Astronomy Letters SP MAIK Nauka/Interperiodica 39/4(2013-04-01), 237-250 1063-7737 39:4<237 2013 39 11443 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer