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HD 115436


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A homogeneous catalog of new UBV and H-beta photometry of B- and A-type stars in and around the Scorpius-Centaurus OB association
B- and A-type stars in and near the Sco-Cen OB association areinvestigated with UBV and H-beta photometry to acquire data relevant tothe luminosity function of Sco-Cen. The measurements generally consistof two 10-s integrations of U, B, V, (W, N) filters, and theobservations are corrected iteratively for atmospheric extinction andinstrumental response. The data presented give the mean V magnitude,mean B-V, mean U-B, and the estimated uncertainties for these values.The catalog provides a homogeneous catalog of data for a large fieldwith stellar objects delineating membership to the association Sco-Cenand that affect the luminosity function of the aggregate.

Intensive photometry of southern Wolf-Rayet stars
Results of an intensive photometric campaign on 17 of the brightestsouthern Wolf-Rayet stars are presented. The detection ofmultiperiodicity in two stars, HD 50896 and HD 96548, is reported. It islikely that these periodicities are not coherent but are manifestationsof the quasi-periodic variations seen in a few WR stars. A good exampleof these variations is given by HD 86161. A new eclipsing binary, HD92740, has been discovered; other stars show periodic variations whichcan be explained by phase-dependent scattering of the secondary light asit traverses the Wolf-Rayet wind. An important conclusion of this studyis that not a single example was found of short-period variations whichcan be attributed to pulsation.

Photometry of southern Wolf-rayet stars.
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Observation and Astrometry data

Constellation:Zentaur
Right ascension:13h18m18.04s
Declination:-57°18'01.2"
Apparent magnitude:7.079
Distance:278.552 parsecs
Proper motion RA:-12.6
Proper motion Dec:-1.4
B-T magnitude:7.193
V-T magnitude:7.089

Catalogs and designations:
Proper Names   (Edit)
HD 1989HD 115436
TYCHO-2 2000TYC 8657-823-1
USNO-A2.0USNO-A2 0300-18044038
HIPHIP 64910

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