A three-station long-baseline radio interferometer

Astronomy and Astrophysics – Astronomy

Scientific paper

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Interstellar Masers, Radio Astronomy, Radio Interferometers, Very Long Base Interferometry, Angular Resolution, Centimeter Waves, Orion Nebula, Radio Antennas, Venus Atmosphere

Scientific paper

In July, 1982, a radio interferometer comprising the 22-m Simeiz (Crimea) and Pushchino antennas and the 70-m Evpatoriya (Crimea) antenna was put in service, and initial observations were made at 1.35-cm wavelength. This system can study structures of angular scale 2.5-85 marcsec. For signals recorded in a 250-kHz band with a 100-sec integration time, the maximum sensitivity is 20 mJy. Visibility functions have been obtained for the H2O-maser sources Orion-KL and W51M, whose angular size and brightness temperature are estimated. Preparations are underway to utilize the interferometer also at 18 cm for astrophysical and space-research applications.

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