... Fitting the observed dependence includes calculations of the polarization cross-sections averaged over particles orientation and size distribution, their normalization and the comparison of obtained dependencies with Serkowski's curve representing observational data for a chosen star. ... Variations of the polarization factors with wavelength are shown in Fig. 16 for homogeneous spheroidal particles with PF orientation. ... The distinction between prolate and oblate spheroids is also clearly seen. ...

Сергей Борисович Попов Доктор физ-мат наук, ведущий научный сотрудник ГАИШ МГУ. ... Занимаюсь в основном двойными и одиночными компактными объектами (нейтронными звездами, черными дырами). ... Поп. ... Основная область научных интересов в настоящее время - эволюция нейтронных звезд. ... Все эти белые карлики, нейтронные звезды и черные дыры являются для нас одними из самых удивительных лабораторий, в которых мы можем изучать явления, недоступные для земных экспериментов. ... Нейтронные звезды . ...

... The STECF IRAF layered package impol provides five tasks specifically aimed at reduction of HST imaging polarimetry data for ACS, FOC, NICMOS and WFPC2. ... Reduction of HST polarimetry data and simulation of raw polarimetry images, together with polarization vector plotting, are covered. ... hstpolsim -- Produce simulated polarization input data frames for HST instruments from images of the total signal, the linear polarization and the position angle of the polarization vectors. ...

Data Archive . Video-records archive . Observations of the linear polarization Tape POL1 29.05.98 - 06.07.2001 Date Start UT Stop UT Counter start 29.05.1998 06:18:23 - 06:20:02 0:00:00 05.06.1998 14:23:34 - 14:26:10 0:02:54 21.06.1998 09:21:09 - 09:24:01 0:08:02 10:02:07 - ...

Подписка на рассылку обзоров astro-ph на Subscribe.Ru . ... Предыдущий выпуск (N335) . ... Обсудить на форуме Scientific.RU . ... Подписка на рассылку обзоров на Subscribe.Ru . Обзоры препринтов astro-ph . ... Собственно обзоры препринтов. ... Ранее обзоры также были на Астронете и на Scientific.Ru . ... АНКи доступны на Астронете , а с 2006 по 2008 г. также на сайте Элементы.Ру . ... Ранее они также размещались на сайте Астронет и в архиве моих обозрений (кодировка KOI8) на сайте Scientific.Ru . ...

... The compression of iflo/ lband receivers (lband wide , lband narrow) was measured on 29apr03. ... Center a band at 1415 Mhz and pass it through a 5 Mhz IF filter (centered at 260 MHz). ... Center another band at 1350,1330 Mhz. ... The 1350 data was normalized to full scale while the 1415 Mhz data was normalized to medianTsys -1 (so the radar 1350 scale and the 1415 Mhz scale are not the same). ... You can see the double bumps in the faa radar (this is the 1350 then 1330 pulses spaced by 6 usecs). ...

... Cameras NIC1, and NIC2, each contain 3 polarizers, whose principal axes of transmission are separated by 120 degrees. ... As with the imaging filters, sensitivity information for the two sets of polarizers may be obtained from the Exposure Time Calculator. It gives the same information as was described in Chapter 4: namely a sensitivity curve, plotted as flux against time for a constant S/N ratio and an exposure exclusion curve for both point and extended sources. ...

... Several HST instruments both current and decommisioned have provided imaging linear polarimetry capabilities. ... The STECF IRAF layered package impol provides five tasks specifically aimed at reduction of HST imaging polarimetry data. ... Reduction of HST polarimetry data and simulation of raw polarimetry images, together with polarization vector plotting, are covered. ... For reduction of data from imaging linear polarization instruments other than from HST, the instrument name is `SPECIAL'. ...

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Комета LINEAR (C/2011 F1) в августе 2012 года. ... е. m њ ----------------------------------------------------------------- Август 1 14h10m50.99s +31 59' 04.6 2.6749 2.7819 11.5 73.4 Boo 3 14h12m02.89s +31 08' 19.5 2.6581 2.7822 11.5 72.4 Boo 5 14h13m19.29s +30 17' 19.0 2.6413 2.7827 11.4 71.5 Boo 7 14h14m40.07s +29 26' 04.5 2.6247 2.7834 11.4 70.5 Boo 9 14h16m05.14s +28 34' 37.2 2.6080 2.7842 11.4 69.5 ...

... How is it described Origins of polarized light How is it important to astrophysics How is it measured 3 Polarized waves: linear 4 Thursday , 30 September 2010 Polarized waves: linear 4 Thursday , 30 September 2010 ... at any angle 5 Thursday , 30 September 2010 or Circular - LCP, RCP Right 6 Thursday , 30 September 2010 or Circular - LCP, RCP Right 6 Thursday , 30 ... Sky light is polarized, maximally at 90 degrees to the sun. ...

Abstract -- Calculations are performed for the linear polarization of starlight due to extinction by aligned dust grains when the starlight traverses a medium with irregular magnetic fields. This medium is intended to represent the optically thick components of interstellar clouds which are observed to make little, if any, contribution to the polarization of starlight. ...

... Currently, there is very little information on comets which are active beyond the orbit of Jupiter. ... Previous observations conducted by our team with the SAO RAS 6-m telescope showed that some of these comets have extended tails dissimilar to the tails of comets forming at close heliocentric distances. ... We for the first time measured the linear polarization of scattered emission for the two distant comets C/2010 S1 (LINEAR) and C/2010 R1 (LINEAR) at heliocentric distances of 5.9-7.0 au. ...

... Polarization spectra of 12 asteroids (bottom panel) and of two regions of the Moon (top panel). ... In particular we are interested in possible relationships between the wavelength-dependent variation of linear polarization and the properties of the surfaces, including albedo and composition. ... We found that objects with marginally different relative reflectance spectra (in the optical) may have totally different polarization spectra. ...

... astro-ph/0303500 . ... В Архиве электронных препринтов появилась интересная и важная обзорная работа с юбилейным номером 0303500. Космический телескоп им. Хаббла . ... Благодаря столь широкому охвату читатель может узнать о множестве открытий последнего десятилетия в астрономии. Существенно и то, что Ливио не просто перечисляет открытия, он много рассказывает о физике явлений. ... Список ссылок занимает 15 страниц. ... Галактики на больших красных смещениях глазами Космического телескопа . ...

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... In spite of the good potential possibilities, some of the station "Dnepr" design characteristics did not allow us to apply the usual special IS radar measurement methods. ... Thus for IS signal measurements at the "Dnepr" station, we have developed special methods for recording and processing IS signals in order to determine plasma ionospheric parameters. ... Equations (4-5) from the basis for data post processing to obtain ionosphere parameters. ...

... Astrophys. ... Vol. ... Lazarian A. Magnetic fields via polarimetry: progress of grain alignment theory // J. of Quant. ... Chandrasekhar S., Fermi E. Magnetic fields in spiral arms // Astrophys. ... Wiebe D. S., Watson W. D. Irregular magnetic fields in interstellar clouds and the linear polarization of starlight // Ibid. ... Rao R., Crutcher R. M., Plambeck R. L., Wright M. C. H. High-resolution millimeter-wave mapping of linearly polarized dust emission: magnetic field structure in Orion // Ibid....

The Sky Polarization Observatory (SPOrt) Program Ettore Carretti et al. Istituto TeSRE/CNR, Bologna, ITALY The main goal of the Sky Polarization Observatory (SPOrt) Pro- gram is the measurement of the sky linear polarized emission in the 22-90 GHz frequency range. SPOrt payload will be accom- modated on the International Space Station in 2003-2004 for a period of 18 months. ...

... Consequently, it is inappropriate to expand and in ordinary spherical harmonics. The proper expansion expresses both and simultaneously in terms of a particular order of generalized spherical harmonics. ... Generalized spherical harmonics start at , and for each , . ... Generalized spherical harmonics obey a sum rule analogous to a familiar one for ordinary spherical harmonics, but it includes an explicit phase factor which depends on the orientation of the two lines of sight. ...