The Zoo of X-ray sources in the Galactic Center Region: Observations with BeppoSAX

Abstract

We report the results of a survey of the Galactic Center region (|l| < 2deg, |b| < 0.5deg) performed with the BeppoSAX satellite. The flux from the center of our Galaxy corresponds to a luminosity of ~3 10^{35} erg/s in the 2-10 keV range. Due to the limited angular resolution ($\gsim 1'$) only part of it is supposed to come from Sagittarius A*, the non-thermal radio source which is believed to mark the dynamical center of the Galaxy. In addition to the diffuse emission, several bright (L$_X\gsim10^{36} ergs/s) point sources have been observed, both persistent (A 1742-294, SLX 1744-299, SLX 1744-300, 1E 1743.1-2843, 1E 1740.7-2942) and transient (XTE J1748-288, SAX J1747.0-2853 and KS 1741-293). The Low Mass X-ray Binary AX J1745.6-2901, discovered with ASCA at only $1.3'$ from SgrA* was detected in a low luminosity state in August 1997. Two fainter sources are very likely associated with young neutron stars: the (possibly diffuse) X-ray source at the center of the composite supernova remnant G0.9+0.1, and the "head" of the axially symmetric radio source G359.23-0.92. The latter has been detected above 6 keV, supporting a non-thermal emission mechanism.

34 pages, 11 figures and 3 tables included, accepted for publication in ApJ

References in corpus (7)

• Advection-Dominated Accretion Model of Sagittarius A*: Evidence for a Black Hole at the Galactic Center
• The Zoo of X-ray sources in the Galactic Center Region: Observations with BeppoSAX
• A Self-Consistent Model for the Broad-band Spectrum of Sgr A East at the Galactic Center
• Further studies of 1E 1740.7-2942 with ASCA
• The Origin of the High-Energy Activity at the Galactic Center
• What can BeppoSAX do about the 2-10 keV cosmic background ? A progress report
• Discovery of X-rays from the supernova remnant G0.9+0.1

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• The Mouse That Soared: High Resolution X-ray Imaging of the Pulsar-Powered Bow Shock G359.23-0.82
• ASCA X-ray source catalogue in the Galactic Center region
• The XMM-Newton/Chandra monitoring campaign of the Galactic center region: Description of the program and preliminary results
• ASCA Observations of the Sgr B2 Cloud: An X-Ray Reflection Nebula
• A Chandra Catalog of X-ray Sources in the Central 150 pc of the Galaxy
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• Traces of past activity in the Galactic Centre
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• A four-year baseline Swift study of enigmatic X-ray transients located near the Galactic center
• A Persistent High-Energy Flux from the Heart of the Milky Way : Integral's view of the Galactic Center
• A four-year XMM-Newton/Chandra monitoring campaign of the Galactic Centre: analysing the X-ray transients
• Heartbeat of the Mouse: a young radio pulsar associated with the axisymmetric nebula G359.23-0.82
• A Candidate Neutron Star Associated with Galactic Center Supernova Remnant Sagittarius A East
• Low-mass X-ray binaries in the bulge of the Milky Way
• Unusual X-ray transients in the Galactic Centre
• Detection of hard X-ray emission from the Galactic nuclear region with INTEGRAL
• A Radio Study of the Mouse, G359.23--0.82
• A catalogue of soft X-ray sources in the galactic center region
• 1E 1740.7-2942: temporal and spectral evolution from INTEGRAL and RXTE observations
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• Discovery of a bright X-ray transient in the Galactic Center with XMM-Newton
• XMM-Newton study of the persistent X-ray source 1E1743.1-2843 located in the Galactic Center direction
• The Galactic LMXB Population and the Galactic Centre Region
• Suzaku Detection of Extended/Diffuse Hard X-Ray Emission from the Galactic Center
• X-ray spectral evolution of SAX J1747.0-2853 during outburst activity and confirmation of its transient nature
• Sgr A East as a possible high energy neutron factory in the Galactic Centre
• ASCA Observations of the Jet Source XTE J1748-288
• XMM-Newton observations of the Galactic Centre Region - II: The soft thermal emission
• Hard X-ray Bursts Recorded by the IBIS Telescope of the INTEGRAL Observatory in 2003-2009
• A thin diffuse component of the Galactic Ridge X-ray emission and heating of the interstellar medium contributed by the radiation of Galactic X-ray binaries
• Wide band observations of the new X-ray burster SAX J1747.0-2853 during the March 1998 outburst
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• Sample of LMXBs in the Galactic bulge. I. Optical and near-infrared constraints from the Virtual Observatory
• INTEGRAL high energy monitoring of the X-ray burster KS 1741-293
• Broadband X-ray properties of black holes GRS 1758-258 and 1E 1740.7-2942: AstroSat and NuSTAR results
• Two spectral states of the transient X-ray burster SAX J1747.0-2853
• Chandra X-ray counterpart of KS 1741-293
• Review of low-mass X-ray binaries near the Galactic center
• Decaying Sterile Neutrinos as a Heating Source in the Milky Way Center
• Prospects for IXPE and eXTP polarimetric archaeology of the reflection nebulae in the Galactic center
• X-ray Bursts from the Source A1742-294 in the Galactic-Center Region
• Statistical Analysis of Point-like Sources in Chandra Galactic Center Survey
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• The very faint X-ray transient Swift J174610-290018 at the Galactic center
• The transient neutron star X-ray binary KS 1741-293 in outburst and quiescence