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Two selection statistics are used to extract new candidate periodicvariables from the epoch photometry of the Hipparcos catalogue. Theprimary selection criterion is a signal-to-noise ratio. The dependenceof this statistic on the number of observations is calibrated usingabout 30000 randomly permuted Hipparcos data sets. A significance levelof 0.1 per cent is used to extract a first batch of candidate variables.The second criterion requires that the optimal frequency be unaffectedif the data are de-trended by low-order polynomials. We find 2675 newcandidate periodic variables, of which the majority (2082) are from theHipparcos`unsolved' variables. Potential problems with theinterpretation of the data (e.g. aliasing) are discussed.
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| Large and kinematically unbiased samples of G- and K-type stars. V - Evolved stars in the selected areas at + 15-deg declination
Abstract image available at:http://adsabs.harvard.edu/cgi-bin/nph-bib_query?1990PASP..102..242E&db_key=AST
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Datos observacionales y astrométricos
| Constelación: | Hércules |
| Ascensión Recta: | 18h25m02.94s |
| Declinación: | +14°08'41.9" |
| Magnitud Aparente: | 7.943 |
| Distancia: | 515.464 parsecs |
| Movimiento Propio en Ascensión Recta: | 1.2 |
| Movimiento Propio en Declinación: | -13.1 |
| B-T magnitude: | 7.938 |
| V-T magnitude: | 7.943 |
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