Search Publications
AXPs and X-ray-dim isolated neutron stars: recent XMM-Newton and Chandra results
Haberl, F.
To date more than half a dozen X-ray-dim isolated neutron stars are known. Their X-ray spectra are characterized by soft blackbody-like emission ( kT∼50-120 eV) without indication for harder, non-thermal components. These stars apparently show no radio emission and no association with supernova remnants. Four of them exhibit pulsations in their X-…
Shocks and particle acceleration in supernova remnants: observational features
Vink, Jacco
The last 10 years a number of observational advances have substantially increased our knowledge of shock phenomena in supernova remnants. This progress has mainly been made possible by the recent improvements in X-ray and γ-ray instrumentation. It has become clear that some shell-type supernova remnants, e.g., SN 1006, have X-ray emission dominate…
XMM-Newton observations of the field of γ-ray burst 980425
Piro, L.; Pian, E.; Palazzi, E. +12 more
The error box of GRB980425 has been observed by XMM- Newton in March 2002, with the aim of measuring the late epoch X-ray emission of the supernova 1998bw and of clarifying its supposed association with the GRB itself. We present here the preliminary results obtained with the EPIC PN camera. Our observations confirm the association between SN 1998…
A serendipitous survey for galaxy clusters by the XMM-Newton Survey Science Center
Elvis, M.; Watson, M. G.; Lamer, G. +6 more
We describe the initial results of a programme to detect and identify extended X-ray sources found serendipitously in XMM-Newton observations. We have analyzed 186 EPIC-PN images at high galactic latitude with a limiting flux of 1 × 10 -14 erg cm -2 s -1 and found 62 cluster candidates. Thanks to the enhanced sensi…
The X-ray halo of G21.5 - 0.9
Bocchino, F.; Bandiera, R.
The emission of the plerion G21.5 - 0.9 appears more extended in X-rays than in radio. This is an unexpected result because it would imply that short-lived X-ray electrons may reach distances even larger than radio electrons. Applying an empirical relationship between dust scattering optical depth and photoelectric column density, the measured col…
XMM-Newton observations of the Vela pulsar
Zane, S.; Hailey, C. J.; Mori, K. +1 more
We present spectral analysis from XMM-Newton observations of the Vela pulsar. We analyzed thermal emission from the pulsar dominating below ~1 keV since extracted spectra are heavily contaminated by nebular emission at higher energy. Featureless high-resolution spectra of the reflection grating spectrometer aboard XMM-Newton suggest the presence o…
X-ray emission of young SN Ia remnants as a probe for an explosion model
Lundqvist, P.; Sorokina, E. I.; Blinnikov, S. I. +1 more
We present results of hydrodynamical simulations of young supernova remnants. To model the ejecta, we use several models (discussed in the literature) of type Ia supernova explosions with different abundances. Our hydro models are one-dimensional and spherically symmetrical, but they take into account ionization kinetics with all important process…
X-ray broad line emission in Seyfert galaxies: Mrk 766 and NGC 4051
Page, M. J.; Branduardi-Raymont, G.; Mason, K. O. +3 more
Long (>100 ks) observations of the bright Seyfert galaxies Mrk 766 and NGC 4051 have been obtained using XMM- Newton. The RGS 5-38 Å spectra reveal evidence of broad features. These can be modelled with relativistic emission lines coming from the immediate vicinity of a massive rotating black hole. Lines of OVIII, NVII and CVI are required to r…
Shock-cloud interactions in the Vela SNR: preliminary results of an XMM-Newton observation
Miceli, M.; Bocchino, F.; Maggio, A.
The study of the clumpy and irregular features in the X-ray emission of middle-aged supernova remnants shells allows us to shed light on the various characteristic of the interstellar medium, like its structure and composition. We have observed with XMM-Newton a small knot in the Vela SNR, which previous ROSAT studies have indicated as one of the …
High resolution spectroscopy of Seyfert warm absorbers with XMM-Newton
Kaastra, J. S.; Behar, E.; Sako, M. +5 more
We present results from the analysis of an XMM-Newton observation of the Seyfert 1 galaxy NGC 7469, the first high resolution X-ray spectrum of this source. The Reflection Grating Spectrometer (RGS) spectrum has several narrow absorption and emission lines of O, N, C and Ne, originating from gas at a range of ionisation parameters, from log ξ∼1.6 …