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HD 236150


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An Einstein Observatory SAO-based catalog of B-type stars
About 4000 X-ray images obtained with the Einstein Observatory are usedto measure the 0.16-4.0 keV emission from 1545 B-type SAO stars fallingin the about 10 percent of the sky surveyed with the IPC. Seventy-fourdetected X-ray sources with B-type stars are identified, and it isestimated that no more than 15 can be misidentified. Upper limits to theX-ray emission of the remaining stars are presented. In addition tosummarizing the X-ray measurements and giving other relevant opticaldata, the present extensive catalog discusses the reduction process andanalyzes selection effects associated with both SAO catalog completenessand IPC target selection procedures. It is concluded that X-rayemission, at the level of Lx not less than 10 exp 30 ergs/s, is quitecommon in B stars of early spectral types (B0-B3), regardless ofluminosity class, but that emission, at the same level, becomes lesscommon, or nonexistent, in later B-type stars.

Catalogue of proper motions in the declination of stars of the Moscow zenith zone.
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Observation and Astrometry data

Constellation:Cassiopeia
Right ascension:23h31m07.69s
Declination:+55°44'52.0"
Apparent magnitude:9.072
Proper motion RA:5.8
Proper motion Dec:-5.3
B-T magnitude:9.203
V-T magnitude:9.083

Catalogs and designations:
Proper Names   (Edit)
HD 1989HD 236150
TYCHO-2 2000TYC 4003-411-1
USNO-A2.0USNO-A2 1425-15187695
HIPHIP 116070

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