...observations

Based on observations collected at/with:
- Mt. Maidanak Observatory, Samarkand, Uzbekistan,
- Special Astrophysical Observatory, Russian Academy of Sciences, Karachai-Cherkessia, Zelenchuk region, Nizhnii-Arkhyz,
- European Southern Observatory, La Silla, Chile,
- Kitt Peak National Observatory, Tucson AZ, U.S.A.,
- Dutch Astronomical Station Ausserbinn, Switzerland,
- International Ultraviolet Explorer.

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...AZT

Astronomicheskii Zerkalnyi Teleskop.

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