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HD 63638


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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.

Photometric standard sequences in Puppis iII = 235° - 255°
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观测天体数据

星座:船尾座
右阿森松:07h48m41.72s
赤纬:-31°37'04.1"
视星:6.957
距离:238.095 天文距离
右阿森松适当运动:-15.8
赤纬适当运动:12.2
B-T magnitude:6.825
V-T magnitude:6.947

目录:
适当名称   (Edit)
HD 1989HD 63638
TYCHO-2 2000TYC 7119-160-1
USNO-A2.0USNO-A2 0525-06371280
HIPHIP 38118

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