AK Sco ubvy and Geneva differential photometry (Alencar+, 2003)

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Stars: Pre-Main Sequence, Binaries: Spectroscopic, Photometry: Uvby, Photometry: Geneva

Scientific paper

uvby and Geneva photometry of AK Sco obtained between 1987 and 1994 at ESO, La Silla.
The file table3a.dat contains 1253 uvby observations obtained with Stroemgren Automatic Telescope (SAT), instrumental system. The transformation coefficients to standard indices can be found in Vaz et al., 1998, Cat. . SAO 208122 was used as primary comparison star and SAO 208143 as secondary comparison star. Standard indices (1994), for SAO 208122 (6 measurements, std errors quoted): V=9.8345+/-0.0022, b-y=0.4506+/-0.0012, m1=0.0958+/-0.0022, c1=0.9355+/-0.0034; for SAO 208143 (3 meas.): V=8.8353+/-0.0024, b-y=0.7193+/-0.0037, m1=0.2903+/-0.0044, c1=0.4670+/-0.0029.
File table3b.dat contains 278 observations obtained in 1989 with the Swiss telescope, in the Geneva system.
(2 data files).

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