Spectral behaviour of some X-ray binaries with the Sigma/Granat telescope

Details Spectral behaviour of some X-ray binaries with the Sigma/Granat telescope Spectral behaviour of some X-ray binaries with the Sigma/Granat telescope

Sep 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001esasp.459..337s&link_type=abstract

In: Exploring the gamma-ray universe. Proceedings of the Fourth INTEGRAL Workshop, 4-8 September 2000, Alicante, Spain. Editor:

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X-Ray Binaries, Sigma/Granat Data

Scientific paper

Some hard X-ray/soft gamma-ray data of the Sigma/Granat telescope are revisited, where hardness-intensity diagrams (HIDs) for some X-ray binaries (all being black hole candidates) are produced; namely, the persistent source, Cygnus X-1, and the X-ray transient sources, Nova Muscae 1991 and Nova Persei 1992. Fractional intensity-intensity diagrams (FID's) are introduced and applied to these sources, which give a further insight into the spectral behaviour of these objects. One source shows a positive correlation between hardness and intensity (Cygnus X-1), another source shows a negative correlation (Nova Persei 1992), and still another one exhibits a more complex behaviour (Nova Muscae 1992).

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