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HD 179654


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ROSAT observations of the W 50/SS 433 system.
SS 433 and the surrounding supernova remnant W 50 were observed inseveral pointings between March 1991 and March 1993 with the PSPConboard ROSAT for a total of more than 60ksec. The soft X-ray flux fromSS 433 varies by up to a factor of two but no clear correlation could befound with precessional or binary phase. The temperature of the best fitthermal spectrum cannot be constrained accurately, but kT>2keV. TheN_H_ value towards SS 433 itself seems to be higher than to the rest ofthe remnant. The two oppositely directed X-ray jets show differentmorphological and spectral properties indicating a strong influence ofthe surrounding matter onto the energy loss mechanism of the jet. Thespectrum of the eastern jet is non-thermal with a power law photon index{GAMMA}~1.6. The jet terminates in a region with thermal emission withstrong spatial similarities between the X-ray and the radio structures.The western jet has a considerably softer X-ray spectrum, either ofthermal origin or with a steep power law ( {GAMMA}>2.3).

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观测天体数据

星座:天鷹座
右阿森松:19h13m15.37s
赤纬:+05°27'58.3"
视星:9.572
右阿森松适当运动:50
赤纬适当运动:10.4
B-T magnitude:10.831
V-T magnitude:9.676

目录:
适当名称   (Edit)
HD 1989HD 179654
TYCHO-2 2000TYC 471-592-1
USNO-A2.0USNO-A2 0900-14220889

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