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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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Dades d'Observació i Astrometria
| Constel·lació: | Crater |
| Ascensió Recta: | 11h34m27.97s |
| Declinació: | -13°48'26.3" |
| Magnitud Aparent: | 8.016 |
| Distancia: | 294.118 parsecs |
| Moviment propi RA: | 1.2 |
| Moviment propi Dec: | -13.8 |
| B-T magnitude: | 9.37 |
| V-T magnitude: | 8.128 |
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