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arxiv: astro-ph/0208130 · v1 · submitted 2002-08-06 · 🌌 astro-ph

GX 339-4: back to life

T. Belloni , E. Nespoli , J. Homan (Osservatorio Astronomico di Brera , Merate , Italy) , M. van der Klis (Astronomical Institute , University of Amsterdam , the Netherlands)
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W.H.G. Lewin J.M. Miller (MIT Cambridge USA) M. Mendez (SRON Utrecht
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keywords powerstatehighoutburstspectraappearsbackblack-hole
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We report preliminary results of a RossiXTE campaign on the 2002 outburst of the black-hole candidate GX 339-4. We show power density spectra of five observations during the early phase of the outburst. The first four power spectra show a smooth transition between a Low State and a Very High State. The fifth power spectrum resembles a High State, but a strong 6 Hz QPO appears suddenly within 16 seconds.

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