The RATAN observations of Cygnus X-1

Details The RATAN observations of Cygnus X-1 The RATAN observations of Cygnus X-1

Aug 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011atel.3546....1t&link_type=abstract

The Astronomer's Telegram, #3546

Astronomy and Astrophysics

Astronomy

Radio, Optical, X-Ray, Binary, Black Hole

Scientific paper

We carry out monitoring of Cygnus X-1 at 4.8 GHz with the RATAN-600 radio telescope (SAO RAS) from April 2011, when Grinberg et al. (ATEL#3307) have detected softing the X-ray emission. We detected the some increase (from ~15 mJy to ~25 mJy) of the flux density at 4.8 GHz during last five days that could be connected with the possible hard-to-soft state transition reported by Negoro et al (ATEL #3534).

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