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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.
| Stellar Spectra and Colors in Cygnus at Galactic Latitude + 14°.
Abstract image available at:http://adsabs.harvard.edu/cgi-bin/nph-bib_query?1952ApJ...116..592M&db_key=AST
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Observation and Astrometry data
| Constellation: | Λύρα |
| Right ascension: | 19h07m21.37s |
| Declination: | +46°05'07.2" |
| Apparent magnitude: | 7.698 |
| Distance: | 826.446 parsecs |
| Proper motion RA: | 3.6 |
| Proper motion Dec: | 12.8 |
| B-T magnitude: | 9.754 |
| V-T magnitude: | 7.868 |
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