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HD 135104


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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.

The 74th Special Name-list of Variable Stars
We present the Name-list introducing GCVS names for 3153 variable starsdiscovered by the Hipparcos mission.

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Gözlemler ve gökölçümü verileri

Takýmyýldýz:Yilan
Sað Açýklýk:15h13m03.28s
Yükselim:+09°34'41.1"
Görünürdeki Parlaklýk:8.317
Uzaklýk:334.448 parsek
özdevim Sað Açýklýk:-10.2
özdevim Yükselim:-15.2
B-T magnitude:9.696
V-T magnitude:8.431

Kataloglar ve belirtme:
Özgün isimleri   (Edit)
HD 1989HD 135104
TYCHO-2 2000TYC 920-630-1
USNO-A2.0USNO-A2 0975-07752369
HIPHIP 74471

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