XMM-Newton and INTEGRAL observations of the very faint X-ray transient IGRJ17285-2922/XTEJ1728-295 during the 2010 outburst

Abstract

We report the first broad-band (0.5-150 keV) simultaneous X-ray observations of the very faint X-ray transient IGRJ17285-2922/XTEJ1728-295 performed with XMM-Newton and INTEGRAL satellites during its last outburst, started on 2010, August 28. XMM-Newton observed the source on 2010 September 9-10, for 22ks. INTEGRAL observations were part of the publicly available Galactic Bulge program, and overlapped with the times covered by XMM-Newton. The broad-band spectroscopy resulted in a best-fit with an absorbed power law displaying a photon index of 1.61+/-0.01, an absorbing column density of (5.10+/-0.05)E21 cm-2, and a flux of 2.4E-10 erg/cm2/s (1-100 keV), corrected for the absorption. The data did not require either a spectral cut-off (E>50 keV) or an additional soft component. The slopes of the XMM-Newton and INTEGRAL separate spectra were compatible, within the uncertainties. The timing analysis does not show evidence either for X-ray pulsations or for type I X-ray bursts. The broad band X-ray spectrum as well as the power density spectrum are indicative of a low hard state in a low mass X-ray binary, although nothing conclusive can be said about the nature of the compact object (neutron star or black hole). The results we are reporting here allow us to conclude that IGRJ17285-2922 is a low mass X-ray binary, located at a distance greater than 4 kpc.

Accepted for publication in MNRAS; 7 pages, 6 figure, 1 table. Accepted 2011 April 5. Received 2011 April 5; in original form 2011 February 25

References in corpus (11)

• Advection-Dominated Accretion and the Black Hole Event Horizon
• A failed outburst of H1743-322
• Average hard X-ray emission from NS LMXBs: Observational evidence of different spectral states in NS LMXBs
• Sedimentation and Type I X-ray Bursts at Low Accretion Rates
• The behavior of subluminous X-ray transients near the Galactic center as observed using the X-ray telescope aboard Swift
• Chandra Localizations and Spectra of INTEGRAL Sources in the Galactic Plane
• XMMU J174716.1-281048: a "quasi-persistent" very faint X-ray transient?
• XMM-Newton and INTEGRAL spectroscopy of the microquasar GRO J1655-40 during its 2005 outburst
• Wide band observations of the X-ray burster GS 1826-238
• Unveiling the hard X-ray spectrum from the "burst-only" source SAX J1753.5-2349 in outburst
• XMM-Newton observations of the low-mass X-ray binary XB1832-330 in the galactic globular cluster NGC 6652

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