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20082026
most citedDetection of the Schwarzschild precession in the orbit of the star S2 near the Galactic centre massive black hole

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astro-ph2008★ 41 cited

Heating in an Extended Accretion Disk Corona along the Z-Pattern in Cyg X-2

N. S. Schulz, D. P. Huenemoerder, L. Ji +3

We observed at very high spectral resolution the prototype Z-source Cyg x-2 twice along its entire X-ray spectral variation pattern. In this preliminary analysis we find an extende…