PHOTOMETRIC INVESTIGATION OF DR AND

Автор(и)

  • S. V. Vasilyeva Astronomical Observatory, Odessa State University, Україна
  • D. E. Mkrtichian Astronomical Observatory, Odessa State University, Україна

DOI:

https://doi.org/10.18524/1810-4215.1997.10.108221

Ключові слова:

Stars, RR Lyrae-type stars, lndividual, DR And

Анотація

. Based upon photographic observations obtained with a 48-cm reflector AZT-S OAO, 236 estimates of the unique RR lyr - type star DR And have been derived. 6 moments of maximum light are listed, these being represented fairly enough by GCVS (1985) elements. The 3-rd order trigonometric polynomial fit corresponds to the period P =0d.56318 ±0 d. 00001 (clos to the GCVS value), initial epoch HJD Max=2445121.466±0d..003, Max=12m.06 ±0 m.04,

Min=13 m.14 ±0 m.06.  Light curve variations may be attributed to the Blazhko effect.

Посилання

Andronov I.L.: 1994, Odessa. Astron. Publ., 7, 49.

Andronov I.L: 1997, As. Ap. Suppl., 125, 207.

Kholopov P.N. (ed): 1985, General Catalogue of Variable Stars, 1, Moscow, Nauka.

Romanov Yu.S., Tsessevich V.P., Shakun L.l., Zgonyaiko N.S.: 1978, Astron. Tsirk., 981.

Tsessevich V.P.: 1957, Astron. Tsirk., 185.

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Опубліковано

2017-08-02

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