Astronomical Netherlands Satellite

(ANS) A joint Netherlands/US satellite that was launched in Aug. 1974 and operated until 1976. It contained a 20-cm ultraviolet telescope providing broad-band (about 15 nm) photometric data on selected astronomical sources at wavelengths of 155 nm, 180 nm, 220 nm, 250 nm, and 350 nm. A catalog of such observations for about 3500 stars has been completed. In addition the satellite carried two X-ray telescopes that made the first observations of an X-ray burst source.

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