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W Ursae Majoris Contact Binary Variables as X-Ray Sources We present cross-identification of archived ROSAT X-ray point sourceswith W UMa variable stars found in the All-Sky Automated Survey. A totalof 34 W UMa stars have been found associated with X-ray emission. Wecompute the distances of these W UMa systems and hence their X-rayluminosities. Our data support the ``supersaturation'' phenomenon seenin these fast rotators, namely that the faster a W UMa star rotates, theweaker its X-ray luminosity.
| A catalogue of eclipsing variables A new catalogue of 6330 eclipsing variable stars is presented. Thecatalogue was developed from the General Catalogue of Variable Stars(GCVS) and its textual remarks by including recently publishedinformation about classification of 843 systems and making correspondingcorrections of GCVS data. The catalogue1 represents thelargest list of eclipsing binaries classified from observations.
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| Photometric Light-Curves of Southern BV-Stars BV 480 = HD 149 573 A3 (Fig.1)
| Bright Southern BV-Stars Not Available
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Observation and Astrometry data
Constellation: | エリダヌス座 |
Right ascension: | 04h33m24.85s |
Declination: | -23°56'19.7" |
Apparent magnitude: | 8.691 |
Distance: | 452.489 parsecs |
Proper motion RA: | 10.7 |
Proper motion Dec: | -20.1 |
B-T magnitude: | 8.984 |
V-T magnitude: | 8.716 |
Catalogs and designations:
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