MAXI/GSC detected a rapid soft X-ray brightening in Cyg X-1

Details MAXI/GSC detected a rapid soft X-ray brightening in Cyg X-1 MAXI/GSC detected a rapid soft X-ray brightening in Cyg X-1

Jul 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010atel.2711....1n&link_type=abstract

The Astronomer's Telegram, #2711

Astronomy and Astrophysics

Astronomy

6

X-Ray, Binaries, Black Holes

Scientific paper

Recent MAXI/GSC data show a gradual spectral softening of the black hole candidate Cyg X-1 since around 2010 June 10. The soft X-ray flux (2-4 keV) once increased rapidly to ~600 mCrab on 2010 June 27 and 28, but it went back to a more common flux level of the low/hard state ~300 mCrab on June 29. The latest data on 2010 July 1, however, show a rapid increase in soft X-ray flux again, reaching ~1.2 Crab (2-4 keV).

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