Spectrophotometric Standards near the Pole (Tereshchenko, 1994)

Physics

Scientific paper

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Energy Distributions, Spectrophotometry

Scientific paper

Absolute energy distributions for 13 circumpolar (δ>+85deg) stars forming a spectrophotometric version of the North Polar Spectrophotometric Sequence (NPSS) are presented. A-type stars of 5-9mag brightness were studied in the range 3100 to 7750A with resolution of 50A. Observations were made with 0.5-m and 1-m telescopes using Seya-Namioka spectrometers. The relative rms error of results in the region 4000-7000A is 2 to 3%, while at the ends of the studied range it is 3-5%. The primary standard was the circumpolar star HD 221525 (V=5.58, A7IV), and its spectral energy distribution had been determined earlier. (1 data file).

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