Browsing by Title
Now showing items 16949-16968 of 24084
-
Polarimetric Observations of 15 AGNs at High Frequencies
(Astronomical Society of the Pacific, 2005)We have obtained total and polarized intensity images of 15 AGNs with the VLBA at 7 mm at 17 epochs from 25/26 March 1998 to 14 April 2001. The VLBA observations are accompanied at many epochs by simultaneous mea- surements ... -
Polarimetric observations of the quasar 3C-345
(1988)Infrared and optical polarimetric observations of the quasar 3C 345 are presented, which show a decrease in the degree of polarization with frequency previously observed by Smith et al., and interpreted by them as the ... -
Polarimetry : a powerful diagnostic tool in astronomy
(2006)Knowledge of the polarization state of radiation provides far more astrophysical information than intensity alone. Polarimetry has played a key role in the development of modern astronomy, providing insight into physical ... -
Polarimetry and modelling of narrow-line active galaxies
(1996)We present optical spectropolarimetry along with optical and infrared broad-band filter polarimetry of selected warm [f(25 μm)/f(60 μm)>=0.3] IRAS galaxies and other known Seyfert 2 galaxies. Broad lines in polarized flux ... -
Polarimetry and photometry of the new AM Herculis system RE J1844-741
(1995)The ROSAT Wide Field Camera extreme-ultraviolet (EUV) source RE J1844-741 was identified with a 16th-magnitude cataclysmic variable with a period of 90 min by O'Donoghue et al. In this paper, we present spectropolarimetry ... -
Polarimetry and the torus
(1996)While the torus plays an obvious role in blocking direct light, and thus increasing the observed polarization from scattering, its role in directly producing polarized flux is less clear. Contributions to the infrared ... -
Polarimetry at UKIRT
(Springer Nature, 2013)Polarimetry has played an important role at UKIRT, both through visitor instruments and as an option on most facility instruments. A large range of science has been carried out covering galactic and extragalactic astronomy. ... -
Polarimetry for the Gemini telescopes
(1998)Polarimeters at optical and near-IR wavelengths are increasingly available as part of facility instruments at major observatories, and are used for a large number of astronomical programs, ranging form nearby star-forming ... -
Polarimetry for the Gemini telescopes
(Int Soc for Optical Engineering, 1998)Polarimeters at optical and near-IR wavelengths are increasingly available as part of facility instruments at major observatories, and are used for a large number of astronomical programs, ranging form nearby star-forming ... -
Polarimetry of External Galaxies
(Astronomical Society of the Pacific, 1996)This review presents results to date on the wavelength dependence of interstellar polarization (ISP) in other galaxies. A number of different techniques are discussed, and galaxy types range from those similar to the Milky ... -
Polarimetry of ST LMi - Discovery of a second accreting pole
(1992)We have obtained simultaneous multiband photometric and polarimetric light curves for ST LMi (CW1103 + 254) in the visible range and the near-infrared on three occasions. These clearly show the presence of previously ... -
Polarimetry of Stars and Planetary Systems
(Cambridge University Press, 2015-05-14) -
Polarimetry of young stellar objects - III : Circular polarimetry of OMC-1
(2000-02-11)We present the first imaging circular polarimetry of the Orion Molecular Cloud, OMC-1. The observations, taken in the J, H, K and nbL bands, reveal a complex pattern of circular polarization. Globally, there is a background ... -
Polarimetry research at the University of Florida
(2004)The advent of large ( or larger) telescopes along with the new breed of mid-IR instrumentation opens a new window to diffraction-limited investigations of the nature of faint or crowded field astronomical objects at mid-IR ... -
Polarimetry Techniques at Optical and Infrared Wavelengths
(Astronomical Society of the Pacific, 2005)The techniques and components used to measure both linear and circular polarization at wavelengths from 0.3 ¹m to 20 ¹m are reviewed. Some emphasis is given to the implementation of polarimetry on the latest generation of ... -
The polarisation of HD 189733
(2016-06-11)We present linear polarization observations of the exoplanet system HD 189733 made with the HIgh Precision Polarimetric Instrument (HIPPI) on the Anglo-Australian Telescope (AAT). The observations have higher precision ...