Suzaku Observation of the Unidentified Very High Energy Gamma-Ray Source HESS J1702-420

  title={Suzaku Observation of the Unidentified Very High Energy Gamma-Ray Source HESS J1702-420},
  author={Takahisa Fujinaga and Aya Bamba and Tadayasu Dotani and Masanobu Ozaki and Gerd Puehlhofer and S. J. Wagner and O. Reimer and Stefan Funk and J. A. Hinton},
  journal={Publications of the Astronomical Society of Japan},
A deep X-ray observation of the unidentified very high energy (VHE) gamma-ray source HESS J1702-420, for the first time, was carried out by Suzaku. No bright sources were detected in the XIS field of view (FOV) except for two faint point-like sources. The two sources, however, are considered not to be related to HESS J1702-420, because their fluxes in the 2-10 keV band (~ 10^-14 erg s^-1 cm^-2) are ~ 3 orders of magnitude smaller than the VHE gamma-ray flux in the 1-10 TeV band (F_{TeV} = 3.1 x… 

Figures and Tables from this paper

Unveiling the Nature of the Unidentified Gamma-Ray Sources. IV. The Swift Catalog of Potential X-Ray Counterparts
A significant fraction (~30%) of the high-energy γ-ray sources listed in the second Fermi Large Area Telescope (LAT) catalog are still of unknown origin, having not yet been associated with
Evidence of 100 TeV gamma-ray emission from HESS J1702-420: a new PeVatron candidate
Aims. The identification of PeVatrons, hadronic particle accelerators reaching the knee of the cosmic ray spectrum (few× 1015 eV), is crucial to understand the origin of cosmic rays in the Galaxy. We
Evidence of 100 TeV γ-ray emission from HESS J1702-420: A new PeVatron candidate
The identification of active PeVatrons, hadronic particle accelerators reaching the knee of the cosmic-ray spectrum (at the energy of few PeV), is crucial to understand the origin of cosmic rays in
Exploration of Galactic γ-ray supernova remnants
New generational very-high-energy telescope arrays have been detecting more than 120 TeV γ-ray sources. Multi-wavelength observations on these γ-ray sources have proven to be robust in shedding light
Exploration of Galactic {\gamma}-Ray Supernova Remnants
New generational very-high-energy telescope arrays have been detecting more than 120 TeV {\gamma}-ray sources. Multi-wavelength observations on these Gamma-ray sources have proven to be robust in
Hadronic versus Leptonic Models for γ-Ray Emission from VER J2227+608
Recent observations of VER J2227+608 reveal a broken power $\gamma$-ray spectrum with the spectral index increasing from $\sim 1.8$ in the GeV energy range to $\sim 2.3$ in the TeV range. Such a
GW 150914-like black holes as Galactic high-energy sources
The first direct detections of gravitational waves (GWs) from black hole (BH) mergers, GW150914, GW151226 and LVT151012, give a robust lower limit $\sim 70000$ on the number of merged,
An X-ray Study for Origin of Galactic Cosmic Rays: Discovery of an X-ray Counterpart of HESS J1427–608
T. Fujinaga1,2, K. Mori3, A. Bamba4 S. Kimura3, T. Dotani2,1,5, M. Ozaki2, K. Matsuta5,2, G. Puhlhofer6, H. Uchiyama7, J. S. Hiraga7, H. Matsumoto8 and Y. Terada9 1 Tokyo Institute of Technology,


Suzaku observations of a TeV unidentified source, HESS J1745–303, are presented. A possible excess of neutral iron line emission is discovered, and is likely associated with the main part of HESS
Suzaku Observations of HESS J1616-508: Evidence for a Dark Particle Accelerator
We observed the bright unidentified TeV γ-ray source HESS J1616−508 with the X-ray Imaging Spectrometers onboard the Suzaku satellite. No X-ray counterpart was found to a limiting flux of 3.1 × 10
Suzaku Detection of Extended/Diffuse Hard X-Ray Emission from the Galactic Center
Five on-plane regions within ˙0: i 8o ft he 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
INTEGRAL IGR J18135–1751 = HESS J1813–178: A New Cosmic High-Energy Accelerator from keV to TeV Energies*
We report the discovery of a soft gamma-ray source, namely, IGR J18135-1751, detected with IBIS, the Imager on Board the INTEGRAL Satellite. The source is persistent and has a 20-100 keV luminosity
Discovery of a possible X-ray counterpart to HESS J1804-216
Suzaku deep observations have discovered two highly significant nonthermal X-ray sources, Suzaku J1804$-$2142 (Src 1) and Suzaku J1804$-$2140 (Src 2), positionally coincident with the unidentified
Search for Pulsar Wind Nebula Associations with Unidentified TeV γ-Ray Sources
Many of the recently discovered TeV γ-ray sources are associated with pulsar wind nebulae (PWNe). In fact, they represent the most populous class of Galactic sources at TeV energies. In addition,
In-Orbit Performance of the Hard X-Ray Detector on Board Suzaku
The in-orbit performance and calibration of the Hard X-ray Detector (HXD) on board the X-ray astronomy satellite Suzaku are described. Its basic performances, including a wide energy bandpass of
Discovery of a Radio Supernova Remnant and Nonthermal X-Rays Coincident with the TeV Source HESS J1813–178
We present the discovery of nonthermal radio and X-ray emission positionally coincident with the TeV gamma-ray source HESS J1813-178. We demonstrate that the nonthermal radio emission is due to a
HESS J1632-478: an energetic relic
Aims. HESS J1632-478 is an extended and still unidentified TeV source in the galactic plane. Methods. In order to identify the source of the very high energy emission and to constrain its spectral
Origin Of The Galactic Ridge X-ray Emission: Millions Of Sources
We analyze a map of the Galactic ridge X-ray emission (GRXE) constructed in the 3–20 keV energy band from RXTE/PCA scan and slew observations. We show that the GRXE intensity follows the Galactic