Cygnus X-3 transition from the ultrasoft to the hard state

2007/08/06 by V. Beckmann, S. Soldi, G. Bélanger +11
Earth and Planetary Sciences · Physics and Astronomy · #Astrophysical Phenomena and Observations #Astrophysics and Cosmic Phenomena #Binary number #Binary system #Black hole (networking) #Black-body radiation #Earth Systems and Cosmic Evolution #Neutron star #Radiation #State (computer science) #Thermal emission #astro-ph

paper · pdf · doi:10.1051/0004-6361:20078160

4 pages, 3 figures, accepted for publication as A&A Research Note

arxiv created 2007/08/06 · openalex publication_date 2007/08/13 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05

Abstract

Aims.The nature of Cygnus X-3 is still not understood well. This binary system might host a black hole or a neutron star. Recent observations by INTEGRAL have shown that Cygnus X-3 was again in an extremely ultrasoft state. Here we present our analysis of the transition from the ultrasoft state, dominated by blackbody radiation at soft X-rays plus non-thermal emission in the hard X-rays, to the low hard state.

Citations

• Doppler Modulation of X-Ray Lines in Cygnus X-3
• First results of IBIS/ISGRI Cygnus X-3 monitoring during INTEGRAL PV phase
• The INTEGRAL Science Data Centre (ISDC)

Cited by

• The INTEGRAL view on black hole X-ray binaries