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V. M. Andruk V. M. Reshetnik Ya. O. Romanyuk V. V. Kleshchonok I. V. Khatko A. I. Yatsenko V. S. Samoylov 《Kinematics and Physics of Celestial Bodies》2012,28(6):296-303
We performed a series of CCD observations in BVRI bands of a celestial region in cluster M67 (NGC 2682) to study the photometric system of the Kyiv network telescope. The signal recording system consists of a CGE-1400 telescope, Celestron #94175 focal reducer, an automatic turret with a set of UBVRI filters, and a Rolera Mgi CCD camera. The operating field of the system is 10.62′ × 10.62′. CCD images are processed in the MIDAS/ROMAFOT package. The reduction coefficients of the instrumental photometric system relative to Johnson’s BVRI system are determined. The resulted value of the module of distance to cluster M67 V ? M V = 9.63 m does not contradict the results of other researchers. The mean square errors for one determination of stellar magnitude for different bands are 0.02–0.12 m . The errors in determining equatorial coordinates in the TYCHO-2 catalog system are ± 1″. 相似文献
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V. V. Kleshchonok N. I. Buromskii I. V. Khat’ko 《Kinematics and Physics of Celestial Bodies》2008,24(2):114-118
An electronic version of the catalog of observations of star occultations by the Moon is described. Methods for improving the observation accuracy are analyzed. Some features of the photometric curves of star occultations are described. We demonstrate that the diffraction effects arising in star occultations by the Moon can be detected with the use of television technique. 相似文献
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Between July 1996 and April 1997, 92 spectra of comet Hale-Bopp were obtained with the 6-meter BTA telescope of the SAO of
the RAS at Mount Pastukhov. The spectra are two-dimensional, which allows one to determine the energy distribution for each
emission along the slit and the energy distribution in wavelength for each individual position in the slit. From the 92 two-dimensional
spectra covering the inner coma, detailed spectral maps of the total near-nuclear region of the comet are available for July
10, 11 and 12, 1996 and April 15, 1997. We propose an hypothesis about an unknown cometary species near λ = 620 nm in the
spectrum obtained July 10, 1996. We also find an effect which may be caused by fluorescence of cometary dust.
This revised version was published online in July 2006 with corrections to the Cover Date. 相似文献
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Diffraction effects in the processing of television observations of stellar occultations by the moon
V. V. Kleshchonok 《Kinematics and Physics of Celestial Bodies》2011,27(1):50-57
This paper analyzes the influence of diffraction phenomena on measuring the moments of stellar occultations by the moon from
television observations. It shows that making the necessary corrections can result in a significant improvement of the accuracy
of measuring occultation moments from photometric curves. For bright stars, the accuracy of television observations can be
as high as 3 ms. 相似文献
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We present the results of narrowband photoelectric observations of comet Hale-Bopp near perihelion, which were made with the
AZT-14telescope at the station Lisniki of Kyiv University Astronomical Observatory. The standard set of IHW cometary filters
was used. The total number of cometary observations was more than 500 during the interval March 13–April 29, 1997. The comet's
nuclear gas production rates Q of C2 and C3 were calculated using the stellar calibration for these filters. The calculations used the Haser model for a neutral cometary
atmosphere. The value Afρ, which is characteristic of the dust production rate, was determined too. Mean values of the production
rates near perihelion are log Q(C2) = 28.4; log Q(C3) = 27.2; (Afρ)BC = 6.0.
This revised version was published online in July 2006 with corrections to the Cover Date. 相似文献
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