ASTROMETRY OF Χ AND H PERSEI BASED ON PROCESSING OF DIGITIZED PLATES OF ARCHIVE OF THE ASTRONOMICAL INSTITUTE OF THE ACADEMY OF SCIENCES OF THE REPUBLIC OF UZBEKISTAN

M. M. Muminov, Q. X. Yuldoshev, Sh. A. Ehgamberdiev, B. B. Kahharov, V. N. Andruk, Yu. I. Protsyuk

Анотація


Work is done  with Epson Expression 10000XL scanner  of  Astronomical Institute  (AI)  of the Academy of Sciences of Uzbekistan. The plates were exposed  with the Normal astrograph (D/F = 330mm / 3467mm, M = 59.56"/mm). The  digitization  of  plates with (16x16) cm in size was made with  resolution  of  1200  dpi (1px = 1.25"). Test research was done using plates at  first (1935.0) and second (1976.9) epochs in the sky area around the χ and h Persei  clusters  (field of view is  2°x2°). Coordinates and B-magnitude  of  stars were  obtained  using TYCHO-2 as the reference catalog. Errors  of  coordinate differences and proper motions for  reduced  and  reference stars are respectively σαδ = ±0.074" and σμαδ = ±0.0018"/year (655 stars). Errors of photometry are σm = ±0.065m and σB = ±0.208m  for  internal convergence and in comparison  with TYCHO-2 catalog. Comparison with UCAC4  catalog  for 8123 stars with B≤17.5m gave us errors of σαδ = ±0.28", σμαδ = ±0.0075"/year and σm = ±0.139m for the equatorial coordinates, proper motions and magnitudes, respectively.

 


Ключові слова


astrometry; methods; data analysis; proper motions; Galaxy; open clusters and associations; individual; χ,h Persei

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Посилання


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DOI: https://doi.org/10.18524/1810-4215.2014.27.81062

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