Search Publications
The 2-10 keV luminosity as a Star Formation Rate indicator
Ranalli, P.; Comastri, A.; Setti, G.
Radio and far infrared luminosities of star-forming galaxies follow a tight linear relation. Making use of ASCA and BeppoSAX observations of a well-defined sample of nearby star-forming galaxies, we argue that tight linear relations hold between the X-ray, radio and far infrared luminosities. The effect of intrinsic absorption is investigated taki…
Determination of the gas-to-dust ratio in nearby dense clouds using X-ray absorption measurements
Grosso, N.; Montmerle, T.; Feigelson, E. D. +3 more
We present a comparison of the gas and dust properties of the dense interstellar matter in six nearby star-forming regions (d<500 pc): rho Oph, Cha I, R CrA, IC 348, NGC 1333, and Orion. We measure from Chandra and XMM-Newton observations the X-ray absorption toward pre-main sequence stars (PMS) without accretion disks (i.e., Class III sources)…
XMM-Newton observation of the brightest X-ray flare detected so far from Sgr A*
Goldoni, P.; Grosso, N.; Decourchelle, A. +5 more
We report the high S/N observation on October 3, 2002 with XMM-Newton of the brightest X-ray flare detected so far from
The XMM-Newton EPIC background: Production of background maps and event files
Read, A. M.; Ponman, T. J.
XMM-Newton background maps for the 3 EPIC instruments in their different instrument/mode/filter combinations and in several energy bands have been constructed using a superposition of 72 pointed observations. Event datasets, with point sources excised, for the different instrument/mode/filter combinations have also been assembled, with longer expo…
The thermal radiation of the isolated neutron star RX J1856.5-3754 observed with Chandra and XMM-Newton
Haberl, F.; Burwitz, V.; Neuhäuser, R. +3 more
We present results of the analysis of data collected in 57-ks XMM-Newton and 505-ks Chandra observations of the nearby ( =~ 120 pc) isolated neutron star RX J1856.5-3754. We confirm most of the statements made by Burwitz et al. (\cite{Buretal01}) who discussed the original 55-ks Chandra data. Detailed spectral analysis of the combined X-ray and op…
The dynamical state of the Coma cluster with XMM-Newton
Pratt, G. W.; Neumann, D. M.; Briel, U. G. +1 more
We present in this paper a substructure and spectroimaging study of the Coma cluster of galaxies based on XMM-Newton data. XMM-Newton performed a mosaic of observations of Coma to ensure a large coverage of the cluster. We add the different pointings together and fit elliptical beta-models to the data. We subtract the cluster models from the data …
XMM-NEWTON High resolution spectroscopy of NGC 5548
Kaastra, J. S.; Steenbrugge, K. C.; de Vries, C. P. +1 more
We analyze a 137 ks exposure X-ray spectrum of the Seyfert 1 galaxy NGC 5548 obtained with the XMM-Newton Reflection Grating Spectrometer. Due to the long exposure time, the spectrum is of higher statistical quality than the previous observations of this AGN. Therefore, we detect for the first time in NGC 5548 inner-shell transitions from O Iii to…
A study of coronal abundances in RS CVn binaries%
Raassen, A. J. J.; Mewe, R.; Audard, M. +2 more
We present XMM-Newton data of several RS CVn binary systems. High-resolution X-ray spectra obtained with the Reflection Grating Spectrometers have been interpreted simultaneously with the European Photon Imaging Camera spectra. Highly active stars show a depletion of elements with a low first ionization potential (FIP) relative to high-FIP element…
Entropy scaling in galaxy clusters: Insights from an XMM-Newton observation of the poor cluster A1983
Arnaud, M.; Pratt, G. W.
An XMM-Newton observation of the cool (kT =2.1 keV ) cluster A1983, at z=0.044, is presented. Gas density and temperature profiles are calculated over the radial range up to 500 h50-1 kpc, corresponding to ~ 0.35 rv . The outer regions of the surface brightness profile are well described with a beta -model with beta =0.74, bu…
XMM-Newton confirmation of soft X-ray excess emission in clusters of galaxies - The discovery of O VII emission from an extended warm baryonic component
Kaastra, J. S.; Tamura, T.; den Herder, J. W. +2 more
We investigate a sample of 14 clusters of galaxies observed with XMM-Newton in a search for soft X-ray excess emission. In five of these clusters a significant soft excess is evident. This soft X-ray excess is compared with the thermal emission from both the hot intracluster gas and any cooling (flow) gas that may be present. A warm (kT=0.2 keV), …