Astronomy and Astrophysics – Astronomy
Scientific paper
Jun 2010
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010atel.2699....1c&link_type=abstract
The Astronomer's Telegram, #2699
Astronomy and Astrophysics
Astronomy
5
Radio, X-Ray, Request For Observations, Binaries, Neutron Stars, Transients
Scientific paper
Recent X-ray observations of the X-ray binary Cir X-1 have revealed a brightening of the X-ray source (ATEL #2608) and the onset of type I X-ray bursts (ATEL #2643, ATEL #2651, ATEL #2653) confirming the neutron star nature of the source. Cir X-1 is a powerful jet source which in recent years has however faded to ~mJy levels in its core emission at GHz frequencies (compared to >Jy flux densities in the 1970s and 1980s).
Broderick John J.
Calvelo D. E.
Fender Rob
Moin Aquib
Nicolson George
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