English
Related papers

Related papers: No X-Ray Excess from the HESS J1741-302 Region exc…

200 papers

A largely extended X-ray emission was discovered around the pulsar PSR J1357-6429 with the Suzaku deep observations. The pulsar, whose characteristic age is 7.3 kyr, is located within the TeV gamma-ray source HESS J1356-645. The extended…

High Energy Astrophysical Phenomena · Physics 2015-06-17 Masaharu Izawa , Tadayasu Dotani , Takahisa Fujinaga , Aya Bamba , Masanobu Ozaki , Junko S Hiraga

We present the ASCA and Suzaku studies of the TeV source HESS J1837--069, which has not been identified in other wave-lengths. We confirm the presence of two X-ray sources in the Suzaku XIS image, AX J1838.0--0655 and AX J1837.3--0652, near…

Astrophysics · Physics 2015-05-13 Takayasu Anada , Ken Ebisawa , Tadayasu Dotani , Aya Bamba

We report on our study of high-energy properties of two peculiar TeV emitters: the "extreme blazar" 1ES 0347-121 and the "extreme blazar candidate" HESS J1943+213 located near the Galactic Plane. Both objects are characterized by quiescent…

High Energy Astrophysical Phenomena · Physics 2015-06-19 Y. T. Tanaka , L. Stawarz , J. Finke , C. C. Cheung , C. D. Dermer , J. Kataoka , A. Bamba , G. Dubus , M. De Naurois , S. J. Wagner , Y. Fukazawa , D. J. Thompson

Suzaku TOO observation of the anomalous X-ray pulsar CXOU J164710.2-455216 was performed on 2006 September 23--24 for a net exposure of 38.8 ks. During the observation, the XIS was operated in 1/8 window option to achieve a time resolution…

During a routine calibration observation of 1E0102.2-7219 in the Small Magellanic Cloud (SMC) carried out in October 2012 for the Suzaku satellite, we detected a transient X-ray source at (RA, Dec) = (01h02m47s, -72d04m54s) in the equinox…

High Energy Astrophysical Phenomena · Physics 2015-06-15 Qazuya Wada , Masahiro Tsujimoto , Ken Ebisawa , Eric D. Miller

Five on-plane regions within +/- 0.8deg of the Galactic center were observed with the Hard X-ray Detector (HXD) and the X-ray Imaging Spectrometer (XIS) onboard Suzaku. From all regions, significant hard X-ray emission was detected with…

We observed an extended X-ray source designated as Suzaku J1759-3450 with the Suzaku and Chandra observations towards 1RXS J175911.0-344921, which is an unidentified X-ray source listed in the ROSAT Bright Source Catalogue. A conspicuous…

High Energy Astrophysical Phenomena · Physics 2015-06-16 Hideyuki Mori , Yoshitomo Maeda , Akihiro Furuzawa , Yoshito Haba , Yoshihiro Ueda

We present results of the Suzaku/XIS observation around the radio supernova remnant (SNR) G12.0-0.1. No significant diffuse emission extending in or along the radio shell was observed. Instead two compact X-ray sources, Suzaku J181205-1835…

High Energy Astrophysical Phenomena · Physics 2015-06-17 Shigeo Yamauchi , Aya Bamba , Katsuji Koyama

We present the results of a Suzaku spectroscopic study of the soft extended X-ray emission in the HII region M17. The spectrum of the extended emission was obtained with a high signal-to-noise ratio in a spatially-resolved manner using the…

We present the Chandra and Suzaku observations of 1RXS J170047.8$-$314442, located towards the Galactic bulge, to reveal a wide-band ($0.3$-$10$ keV) X-ray morphology and spectrum of this source. With the Chandra observation, no point…

High Energy Astrophysical Phenomena · Physics 2016-12-14 Hideyuki Mori , Yoshitomo Maeda , Yoshihiro Ueda , Kazuhiro Nakazawa , Yuzuru Tawara

Observations conducted with H.E.S.S. at high energies have led to the discovery of numerous gamma-ray sources in the Galactic plane at TeV energies. One of these sources, HESS J1832-085, has been suggested to be a pulsar wind nebula (PWN);…

High Energy Astrophysical Phenomena · Physics 2025-03-24 Ebru Aktekin

The unidentified VHE (E>100 GeV) gamma-ray source HESS J1507-622 seems to not fit into standard models for sources related to young supernova remnants, pulsar wind nebulae, or young stellar populations in general. This is due to its…

High Energy Astrophysical Phenomena · Physics 2015-06-23 P. Eger , W. F. Domainko , J. Hahn

We report the results of three Chandra observations covering most of the extent of the TeV gamma-ray source HESS J1616-508 and a search for a lower energy counterpart to this source. We detect 56 X-ray sources, of which 37 have counterparts…

High Energy Astrophysical Phenomena · Physics 2017-06-14 Jeremy Hare , Oleg Kargaltsev , George G. Pavlov , Blagoy Rangelov , Igor Volkov

We discovered Fe $K_{\alpha}$ complex emission and pulsation in two highly variable sources (4XMM J174917.7--283329, 4XMM J174954.6--294336). The equivalent widths of 6.4 and 6.7 keV lines of 4XMM J174917.7--283329 are $99^{+84}_{-72}$ and…

High Energy Astrophysical Phenomena · Physics 2023-03-15 Samaresh Mondal , Gabriele Ponti , Frank Haberl , Kaya Mori , Nanda Rea , Mark R. Morris , Sergio Campana , Konstantina Anastasopoulou

Extended regions of very high energy $\gamma$-ray emission associated with middle-aged pulsars have been found by $\gamma$-ray observatories. These regions, called TeV halos or pulsar halos, are thought to be created when energetic…

High Energy Astrophysical Phenomena · Physics 2025-04-14 David Guevel , Kim L Page , Kaya Mori , Amy Lien , Ke Fang

We report on recent XMM-Newton observations, archival radio continuum and CO data, and SED modeling of the unidentified Galactic plane source HESS J1708-410. No significant extended X-ray emission is observed, and we place an upper limit of…

High Energy Astrophysical Phenomena · Physics 2014-11-20 Adam Van Etten , Stefan Funk , Jim Hinton

We present a timing and spectral analysis of the X-ray pulsar XTE J1946+274 observed with Suzaku during an outburst decline in 2010 October and compare with previous results. XTE J1946+274 is a transient X-ray binary consisting of a Be-type…

We have observed the diffuse X-ray emission from the Galactic center (GC) using the X-ray Imaging Spectrometer (XIS) on Suzaku. The high-energy resolution and the low-background orbit provide excellent spectra of the GC diffuse X-rays…

We present results obtained from a series of observations of the supernova remnant RX J1713.7-3946 by the Suzaku satellite. The observations cover about two-thirds of the remnant surface. We successfully detected hard X-rays up to ~ 40 keV…

We report the timing and spectral properties of Be/X-ray binary pulsar GX 304-1 by using two Suzaku observations during its 2010 August and 2012 January X-ray outbursts. Pulsations at ~275 s were clearly detected in the light curves from…

Solar and Stellar Astrophysics · Physics 2016-02-16 Gaurava K. Jaisawal , Sachindra Naik , Prahlad Epili