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HD 115279


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ROSAT X-ray survey of an area 10 degrees square around the active radio galaxy Centaurus A
Diffuse X-ray material extends in an irregular, broad filament for morethan 5 degrees north east of the giant radio elliptical, NGC 5128 (CenA). In the opposite direction the X-ray extension is clearly traced forabout 2 degrees, making an overall line of X-rays of greater than 7degon the sky originating from Cen A. The direction of this line coincidesalmost exactly with the direction of the X-ray jet, and its associatedradio jet, in the interior of Cen A. At a slightly different angle,within the accuracy of measurement along the X-ray counter jet, isencountered the radio and X-ray galaxy NGC 5090. Its presence in theX-ray ejection from Cen A supports the precedent from other associationsthat NGC 5090 is physically associated with Cen A. In the hardest X-raysthere is some indication that the radio lobes from Cen A are edgebrightened. Positions and known identifications of sources in the fieldare given. Some preliminary estimates of the properties of thisextensive X-ray material which has apparently been ejected from thisactive galaxy are given.

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Observation and Astrometry data

Constellation:Centaurus
Right ascension:13h16m46.25s
Declination:-41°16'58.8"
Apparent magnitude:7.218
Distance:221.729 parsecs
Proper motion RA:-21.4
Proper motion Dec:1.7
B-T magnitude:8.401
V-T magnitude:7.316

Catalogs and designations:
Proper Names
HD 1989HD 115279
TYCHO-2 2000TYC 7782-20-1
USNO-A2.0USNO-A2 0450-15426158
HIPHIP 64791

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