Zobrazeno 1 - 10
of 60
pro vyhledávání: '"K. Serkowski"'
Autor:
K. Serkowski, Jack E. Frecker
Publikováno v:
Applied optics. 15(3)
A polarimeter is described, which provides achromatic modulation over the spectral range 0.3 to 1.1 microns, with very small light losses. The instrument is the first one to use superachromatic half-wave plates; such a plate is made of three achromat
Autor:
K. Serkowski
Publikováno v:
Icarus. 27:13-24
A method of wavelength calibration is proposed which may enable measuring changes in radial velocity of bright solar-type stars to an accuracy of about 5 meters per second. Such accuracy would be sufficient for detecting Jupiter-like planets around t
Autor:
K. Serkowski
Publikováno v:
Symposium - International Astronomical Union. 6:204-208
The stars in the Double Cluster in Perseus whose angular distance is small have similar polarization and similar colour excesses. Quantitative description of this effect is the purpose of this paper.
Publikováno v:
International Astronomical Union Colloquium. 7:51-56
The Polarization of 19 Bright, Highly Polarized Stars was measured from March until July 1965, with a differential polarimeter installed at the Cassegrain focus of the 90-cm telescope of the Toruń Observatory in Poland. The stellar light was split b
Autor:
K. Serkowski
Publikováno v:
International Astronomical Union Colloquium. 15:11-31
The changes in stellar polarization with time were first discovered in 1958 by GRIGORYAN (1958) for the red supergiant µ Cephei. In subsequent year BEHR (1959) gave a hint in a footnote to his catalogue that the emission-line B-type star α Cas seem
Autor:
K. Serkowski
Publikováno v:
Symposium - International Astronomical Union. 52:145-152
A review of observational data on interstellar polarization is given. The degree of fluctuation in the direction of the galactic magnetic field is discussed. An empirical formula is given which fits all the observations of the wavelength dependence o
Autor:
K. Serkowski
Publikováno v:
Reviews of Modern Physics. 30:952-954
The polarization of the stars in open clusters, explained on the basis of the Davis-Greenstein theory, gives some information on the microstructure of the galactic magnetic field.The polarization is most conveniently described by the parameters Q, U,
Publikováno v:
Publications of the Astronomical Society of Australia. 1:201-203
Photo-electric observations of the occultation of BD —17°4388 by Neptune on 1968 April 7 were made with instruments and techniques as listed in Table I. A preliminary report of these observations has been given in IAU Circular No. 2067.
Publikováno v:
SPIE Proceedings.
A spectrometer constructed to search for extrasolar planets is connected to a telescope by a single optical fiber acting as an image scrambler. A nitrogen dioxide absorption cell is used as a wavelength standard. Either an intensified charge injectio