Search Publications
X-ray observations of the galaxy cluster PKS0745-191: to the virial radius, and beyond
Young, A. J.; Fabian, A. C.; Russell, H. R. +2 more
We measure X-ray emission from the outskirts of the cluster of galaxies PKS0745-191 with Suzaku, determining radial profiles of density, temperature, entropy, gas fraction and mass. These measurements extend beyond the virial radius for the first time, providing new information about cluster assembly and the diffuse intracluster medium out to ~1.5…
Gamma-ray emission from SNR RX J1713.7-3946 and the origin of galactic cosmic rays
Morlino, G.; Amato, E.; Blasi, P.
We calculate the flux of non-thermal radiations from the supernova remnant (SNR) RX J1713.7-3946 in the context of the non-linear theory of particle acceleration at shocks, which allows us to take into account self-consistently the dynamical reaction of the accelerated particles, the generation of magnetic fields in the shock proximity and the dyn…
The first outburst of the new magnetar candidate SGR0501+4516
Campana, S.; Tiengo, A.; Hurley, K. +17 more
We report here on the outburst onset and evolution of the new soft gamma-ray repeater SGR0501+4516. We monitored the new SGR with XMM-Newton starting on 2008 August 23, 1 day after the source became burst active, and continuing with four more observations in the following month, with the last one on 2008 September 30. Combining the data with the S…
An intermediate black hole spin in the NLS1 galaxy SWIFT J2127.4+5654: chaotic accretion or spin energy extraction?
de Rosa, A.; Vaughan, S.; Fabian, A. C. +5 more
We have observed the hard X-ray selected Narrow-Line Seyfert 1 galaxy SWIFT J2127.4+5654 with Suzaku. We report the detection of a broad relativistic iron emission line from the inner accretion disc. Partial covering by either neutral or partially ionized gas cannot reproduce the spectral shape and, even if its presence is assumed, it does not sig…
X-ray observations of PSR B1259-63 near the 2007 periastron passage
Takahashi, T.; Uchiyama, Y.; Aharonian, F. +2 more
PSR B1259-63 is a 48-ms radio pulsar in a highly eccentric 3.4-yr orbit with a Be star SS 2883. Unpulsed γ-ray, X-ray and radio emission components are observed from the binary system. It is likely that the collision of the pulsar wind with the anisotropic wind of the Be star plays a crucial role in the generation of the observed non-thermal emiss…
Relativistically broadened iron line in the Suzaku observation of the neutron star X-ray binary 4U 1705-44
Young, A. J.; Fabian, A. C.; Reis, R. C.
The X-ray spectra of accreting compact objects often exhibit discrete emission features associated with fluorescent emission in the accretion disc, the strongest of which is the Fe Kα fluorescence line at 6.4-6.97keV. These reflection features are amongst the best tools in the study of the inner region of accretion flow around a compact object. He…
XMM-Newton and Suzaku analysis of the Fe K complex in the type 1 Seyfert galaxy Mrk 509
Maraschi, L.; Bianchi, S.; Cappi, M. +11 more
We report on partially overlapping XMM-Newton (~260 ks) and Suzaku (~100 ks) observations of the iron K band in the nearby, bright type 1 Seyfert galaxy Mrk 509. The source shows a resolved neutral Fe K line, most probably produced in the outer part of the accretion disc. Moreover, the source shows further emission bluewards of the 6.4 keV line du…
X-ray spectral evolution of the extragalactic Z source LMC X-2
Misra, R.; Agrawal, V. K.
We present the results obtained by a detailed study of the extragalactic Z source LMC X-2, using broad-band Suzaku data and a large (~750ks) data set obtained with the proportional counter array (PCA) onboard the Rossi X-ray Timing Experiment (RXTE). The PCA data allow the study of the complete spectral evolution along the horizontal, normal and f…
The multi-band non-thermal emission from the supernova remnant RX J1713.7-3946
Zhang, L.; Fang, J.; Zhang, J. F. +2 more
Non-thermal X-rays and very high energy (VHE) γ-rays have been detected from the supernova remnant (SNR) RX J1713.7-3946, and the recent observations with the Suzaku satellite clearly reveal a spectral cut-off in the X-ray spectrum, which directly relates to the cut-off of the energy spectrum of the parent electrons. However, whether the origin of…
The X-ray properties of the energetic pulsar PSR J1838-0655
Lin, Lupin Chun-Che; Takata, Jumpei; Hwang, Chorng-Yuan +1 more
We present and interpret several new X-ray features of the X-ray pulsar PSR J1838-0655. The X-ray data are obtained from the archival data of Chandra, RXTE and Suzaku. We combine all these X-ray data and fit the spectra with different models. We find that the joint spectra are difficult to fit with a single power law; a broken power-law model with…