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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Takahashi, Hiromitsu
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (10/10 displayed)
- 2012The Hard X-ray Imager (HXI) for the ASTRO-H missioncitations
- 2011Improvements in Calibration of GSO Scintillators in the Suzaku Hard X-Ray Detectorcitations
- 2010Hard x-ray imager (HXI) for the ASTRO-H Missioncitations
- 2008In-Orbit Timing Calibration of the Hard X-Ray Detector on Board Suzakucitations
- 2008Suzaku Detection of Extended/Diffuse Hard X-Ray Emission from the Galactic Centercitations
- 2008Low/Hard State Spectra of GRO J1655-40 Observed with Suzaku
- 2008Low/Hard State Spectra of GRO J1655-40 Observed with Suzakucitations
- 2008Suzaku Broad-band Results On Cygnus X-1 In The Low/hard State
- 2007Improvement of ceramic YAG(Ce) scintillators to (YGd) <SUB>3</SUB>Al <SUB>5</SUB>O <SUB>12</SUB>(Ce) for gamma-ray detectorscitations
- 2007Suzaku observation of the black hole transient 4U1630-472: discovery of absorption linescitations
Places of action
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article
Suzaku Detection of Extended/Diffuse Hard X-Ray Emission from the Galactic Center
Abstract
Five on-plane regions within ±0°.8 of the galactic center were observed with the Hard X-ray Detector (HXD) and the X-ray Imaging Spectrometer (XIS) aboard Suzaku. From all regions, significant hard X-ray emission was detected with HXD-PIN up to 40keV, in addition to the extended plasma emission which is dominant in the XIS band. The hard X-ray signals are inferred to come primarily from a spatially extended source, rather than from a small number of bright discrete objects. Contributions to the HXD data from catalogued X-ray sources, typically brighter than 1mCrab, were estimated and removed using information from Suzaku and other satellites. Even after this removal, the hard X-ray signals remained significant, exhibiting a typical 12-40keV surface brightness of 4×10<SUP>-10</SUP> erg cm<SUP>-2</SUP> s<SUP>-1</SUP> deg<SUP>-2</SUP> and power-law-like spectra with a photon index of 1.8. Combined fittings to the XIS and HXD-PIN spectra confirm that a separate hard tail component is superposed onto the hot thermal emission, confirming a previous report based on the XIS data. Over the 5--40keV band, the hard tail is spectrally approximated by a power law of photon index ̃2, but better by those with somewhat convex shapes. Possible origins of the extended hard X-ray emission are discussed....