Statistics – Computation
Scientific paper
Oct 1987
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987pazh...13..900t&link_type=abstract
Pis'ma v Astronomicheskii Zhurnal (ISSN 0320-0108), vol. 13, Oct. 1987, p. 900-906. In Russian. In Russian. In Russian.
Statistics
Computation
1
Binary Stars, Electrophotometry, Lunar Occultation, Spectrum Analysis, Stellar Magnitude, Stellar Spectrophotometry, Computational Astrophysics, Diameters, Spectral Resolution
Scientific paper
The photoelectric observations of the lunar occultations of 25 stars are obtained in 1982 at the 48-cm reflector of the High-Altitude Observatory of the Sternberg Astronomical Institute near Alma-Ata. The values of stellar angular dimensions for 13 stars or close stellar systems and some other parameters are determined from the analysis of the diffraction patterns registered with resolution time 1 ms. The occultation of SAO 79361 was observed during the total lunar eclipse at 9 January 1982. In the case of the star HR 1997 (the well known astrometric and spectral binary ADS 4392), a duplicity is evidently seen on the trace; this allows the evaluation of a vector separation of ρx ≅ 0arcsec.065. In some cases the values of angular diameters obtained by single-star model reduction are considerably larger than the reasonable indirect evaluations; the author suggests that these stars are close binaries or multiple systems. A table of results including geometric occultation time determinations (with accuracy of 1 - 5 ms) is presented.
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