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Long term variability of Cygnus X-1
2004
Astronomy and Astrophysics
Long time scale radio-X-ray correlations in black holes during the hard state have been found in many sources and there seems to emerge a universal underlying relationship which quantitatively describes this behavior. Although it would appear only natural to detect short term emission patterns in the X-ray and - with a certain time lag - in the radio, there has been little evidence for this up to now. The most prominent source for radio-X-ray correlations on short time scales (minutes) so far
doi:10.1051/0004-6361:20040280
fatcat:gkpgmx2sgrf7hf5pfb3l4sa42q