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Photoelectric observations of 44i Boo (BD+48°2259)

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Abstract

The observations of the eclipsing binary 44i Boo was made in 1978 Biruni Observatory, Shiraz, Iran. The filters used were the standard Strömgrenuvby filters. The comparison star during the observations was 47 k i Boo (BD+48°2262). All differential atmospheric extinction effects were then removed in the reduction process. The variable (44i Boo) and the comparison stars are very close to each other, so that the extinction corrections were insignificant. Following an introductory section about a description of the stellar type and the properties of the photoelectric light curve of 44i Boo will be set third. Section 2 will contain the technique of observation with the telescope for obtaining data points, and also phase determination of the time of observations. Section 3 will give the reduction of the data points, and in reducing the charts, we have to determine the time for the mid-point of each fluctuation for each filter and its deflection, and eventially we have suggested two methods for reducing the charts. Section 4 will outline some requiring steps for running the computer programme, and then from the computer output, we obtain the light curve of the programme star. It is inclosed the final light curves of 44i Boo for filtersu, v, b, andy by this paper. An analysis of the light curves of 44i Boo will introduce in the frequency domain (Kopal, 1977; Edalati, 1978) in a subsequent paper.

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Authors and Affiliations

  1. Dept. of Physics, University of Ferdowsi Mashad, Iran

    M. T. Edalati, B. Khalesse & A. Gharanjeek

Authors
  1. M. T. Edalati
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  2. B. Khalesse
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  3. A. Gharanjeek
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Edalati, M.T., Khalesse, B. & Gharanjeek, A. Photoelectric observations of 44i Boo (BD+48°2259). Astrophys Space Sci 152, 89–104 (1989). https://doi.org/10.1007/BF00645989

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  • DOI: https://doi.org/10.1007/BF00645989

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