To access the full text documents, please follow this link:

Long-term X-ray variability of the microquasar system LS5039/RX J1826.2-1450
Reig, P.; Ribó Gomis, Marc; Paredes i Poy, Josep Maria; Martí Ribas, Josep
Universitat de Barcelona
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)= 4.7 x 10^{-12} 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 Gamma=1.8+-0.2 and hydrogen column density of NH=1.0^{+0.4}_{-0.3} x 10^{22} 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 for 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.
Estels binaris de raigs X
X-ray binaries
Radio astronomy
(c) Springer Verlag, 2003
Springer Verlag

Show full item record

Related documents

Other documents of the same author

Ribó Gomis, Marc; Reig, P.; Martí Ribas, Josep; Paredes i Poy, Josep Maria
Ribó Gomis, Marc; Ros, Eduardo; Paredes i Poy, Josep Maria; Massi, M.; Martí Ribas, Josep
Massi, M.; Ribó Gomis, Marc; Paredes i Poy, Josep Maria; Garrington, S. T.; Peracaula i Bosch, Marta; Martí Ribas, Josep
Martí Ribas, Josep; Paredes i Poy, Josep Maria; Bloom, J. S.; Casares, J.; Ribó Gomis, Marc; Falco, E. E.
Paredes i Poy, Josep Maria; Ribó Gomis, Marc; Ros, Eduardo; Martí Ribas, Josep; Massi, M.