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HD 125558


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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.

Über die Veränderlichkeit der Sterne des Spektraltyps A
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Photo-electric colours of B- and A-type stars in a number of Selected Areas
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Gözlemler ve gökölçümü verileri

Takýmyýldýz:Coban
Sað Açýklýk:14h18m52.43s
Yükselim:+48°35'32.7"
Görünürdeki Parlaklýk:7.101
Uzaklýk:73.475 parsek
özdevim Sað Açýklýk:55.7
özdevim Yükselim:-58.5
B-T magnitude:7.446
V-T magnitude:7.13

Kataloglar ve belirtme:
Özgün isimleri   (Edit)
HD 1989HD 125558
TYCHO-2 2000TYC 3475-782-1
USNO-A2.0USNO-A2 1350-08409292
HIPHIP 69951

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