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HD 100293


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The Carina Spiral Feature: Strömgren-Hβ photometry approach. I. The photometric data-base
A data-base collating all uvbybeta photometry available at present forO-B9 stars brighter than 10th visual magnitude in the field of theCarina Spiral Feature is presented. The completeness and homogeneity ofthe data-base are discussed.Based on CDS data.Table 1 is only available in electronic form at the CDS via anonymousftp to cdsarc.u-strasbg.fr (130.79.128.5) or viahttp://cdsweb.u-strasbg.fr/cgi-bin/qcat?J/A+A/410/523

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.

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Observation and Astrometry data

Constellation:Κένταυρος
Right ascension:11h31m59.76s
Declination:-59°44'25.9"
Apparent magnitude:8.516
Distance:421.941 parsecs
Proper motion RA:-15.3
Proper motion Dec:-4.4
B-T magnitude:8.452
V-T magnitude:8.511

Catalogs and designations:
Proper Names   (Edit)
HD 1989HD 100293
TYCHO-2 2000TYC 8629-824-1
USNO-A2.0USNO-A2 0300-13032797
HIPHIP 56264

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