2003/04/18 by P. Reig, M. Ribó, M. Ribo +3 · 1 citation
Physics and Astronomy · #Accretion (finance) #Accretion disc #Astrophysical Phenomena and Observations #Astrophysics #Compact star #Eclipse #Flux (metallurgy) #Galaxies: Formation, Evolution, Phenomena #Gamma-ray bursts and supernovae #Light curve #Low Mass #Materials science #Neutron star #Optics #Orbital period #Photon #Physics #Power law #X-ray transient #astro-ph
paper · pdf · doi:10.1051/0004-6361:20030674
published as Astron.Astrophys. 405 (2003) 285-290 · 6 pages, 5 figures, accepted for publication in A&A
arxiv created 2003/04/18 · openalex publication_date 2003/06/16 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
We report on the results of the spectral and timing analysis of a BeppoSAX observation of the microquasar system LS 5039/RX J1826.2-1450. The source was found in a low-flux state with FX(1–10 keV) = erg cm-2 s-1, which represents almost one order of magnitude lower than a previous RXTE observation 2.5 years before. The 0.1–10 keV spectrum is described by an absorbed power-law continuum with photon-number spectral index and hydrogen column density of cm-2. According to the orbital parameters of the system, the BeppoSAX observation covers the time of an X-ray eclipse should one occur. However, the 1.6–10 keV light curve does not show evidence of such an event, which allows us to give an upper limit to the inclination of the system. The low X-ray flux detected during this observation is interpreted as a decrease in the mass accretion rate onto the compact object due to a decrease in the mass-loss rate from the primary.