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HD 15017


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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.

Mining in the HIPPARCOS raw data
The Hipparcos solutions flagged as unreliable after the completion ofthe standard data processing have been systematically revisited in thelight of additional information, primarily related to theirmultiplicity. In many cases improved solutions have been obtained,yielding at the same time an Hipparcos based separation and positionangle and a better astrometric solution for the system. The principlesapplied in this reprocessing are explained and more than a hundred newsolutions with absolute and relative astrometry are presented anddiscussed. Tables 1 to 7 are also available in electronic form at theCDS via anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or viahttp://cdsweb.u-strasbg.fr/Abstract.html

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Datos observacionales y astrométricos

Constelación:Ballena
Ascensión Recta:02h24m41.64s
Declinación:-20°02'22.2"
Magnitud Aparente:8.876
Distancia:71.994 parsecs
Movimiento Propio en Ascensión Recta:-10.9
Movimiento Propio en Declinación:-12.6
B-T magnitude:9.484
V-T magnitude:8.927

Catálogos y designaciones:
Nombres Propios   (Edit)
HD 1989HD 15017
TYCHO-2 2000TYC 5862-1660-1
USNO-A2.0USNO-A2 0675-00840497
HIPHIP 11241

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