The temporal and spectral properties of Cyg X-1 during a large X-ray flare

Details The temporal and spectral properties of Cyg X-1 during a large X-ray flare The temporal and spectral properties of Cyg X-1 during a large X-ray flare

Oct 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001aipc..587...76f&link_type=abstract

GAMMA 2001: Gamma-Ray Astrophysics 2001. AIP Conference Proceedings, Volume 587, pp. 76-80 (2001).

Astronomy and Astrophysics

Astrophysics

X-Ray Binaries, X-Ray Sources, X-Ray Bursts, Luminosities, Magnitudes, Effective Temperatures, Colors, And Spectral Classification

Scientific paper

We present results from a monitoring campaign on Cyg X-1 during a large X-ray flare. During this period, the spectrum of the source evolved significantly: the higher the soft flux the steeper the spectrum. The evolution follows a simple pattern of pivoting around 8-10 keV, which is similar to that observed in the 1996 state transition. The power density spectrum during the flare is typical of the source during a spectral state transition, so do the correlations among temporal properties and the spectral properties. Therefore, an X-ray flare and a spectral state transition appear to be similar phenomenon and the difference seems to be only quantitative. .

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