First broad band study of the mysterious source 1E 1743.1-2843

Abstract

In the last years, the persistent source 1E 1743.1-2843 has been observed in the X-rays, but never above 20 keV. In previous works, it was stressed that a possible high energy emission could give further indications on the accreting object nature which remains still unknown. We present here more than two years of 1E 1743.1-2843 monitoring with INTEGRAL/IBIS as well as public XMM-Newton and Chandra X-ray observations. The temporal study in the 20-40 keV band shows a rather constant flux on few months time scale. Based on this result we have performed the broad-band spectral analysis using EPIC/IBIS non simultaneous data and ACIS-I/IBIS data collected during 2004. In ~2 Ms, we report a detection of 6 sigma in the energy range 35-70 keV. The first broad-band study (2-70 keV) shows a steep slope (~3) and a black body temperature of 1.7 keV. Combining spectral parameters and discussion about the luminosity evaluations for different possible distances, our conclusions are in favour of a LMXB system with a neutron star at distance higher than the Galactic Centre, even though a firm conclusion can not be stated.

arXiv comment4 pages, 3 figures, accepted for publication in A&A

References in corpus (9)

• ISGRI: the INTEGRAL Soft Gamma-Ray Imager
• Intermediate-Mass Black Holes
• Do X-ray Binary Spectral State Transition Luminosities Vary?
• Radiative Processes, Spectral States and Variability of Black-Hole Binaries
• A Catalog of Candidate Intermediate-luminosity X-ray Objects
• A Persistent High-Energy Flux from the Heart of the Milky Way : Integral's view of the Galactic Center
• The Rates of type I X-ray Bursts from Transients Observed with RXTE: Evidence for Black Hole Event Horizons
• XMM-Newton study of the persistent X-ray source 1E1743.1-2843 located in the Galactic Center direction
• Broad-band X-ray spectra of the persistent black hole candidates LMC X-1 and LMC X-3

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• The Swift Bulge Survey: Motivation, Strategy, and First X-ray Results
• The Galactic LMXB Population and the Galactic Centre Region
• Suzaku Detection of Extended/Diffuse Hard X-Ray Emission from the Galactic Center
• XMM-Newton observations of the Galactic Centre Region - II: The soft thermal emission
• NuSTAR and XMM-Newton observations of 1E1743.1-2843: indications of a neutron star LMXB nature of the compact object
• Finding persistent sources with the BeppoSAX/WFC: a in-depth analysis