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New periodic variables from the Hipparcos epoch photometry
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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| Yerkes actinometry. Zone +73deg to +90deg.
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Datos observacionales y astrométricos
| Constelación: | Dragón |
| Ascensión Recta: | 19h19m37.97s |
| Declinación: | +81°47'45.8" |
| Magnitud Aparente: | 7.822 |
| Distancia: | 458.716 parsecs |
| Movimiento Propio en Ascensión Recta: | -14.1 |
| Movimiento Propio en Declinación: | -6 |
| B-T magnitude: | 9.83 |
| V-T magnitude: | 7.988 |
Catálogos y designaciones:
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