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The European Photon Imaging Camera on XMM-Newton: The pn-CCD camera
Bignami, G. F.; Pietsch, W.; Haberl, F. +55 more
The European Photon Imaging Camera (EPIC) consortium has provided the focal plane instruments for the three X-ray mirror systems on XMM-Newton. Two cameras with a reflecting grating spectrometer in the optical path are equipped with MOS type CCDs as focal plane detectors (Turner \cite{mturner}), the telescope with the full photon flux operates the…
The European Photon Imaging Camera on XMM-Newton: The MOS cameras
Bignami, G. F.; Tiengo, A.; Arnaud, M. +60 more
The EPIC focal plane imaging spectrometers on XMM-Newton use CCDs to record the images and spectra of celestial X-ray sources focused by the three X-ray mirrors. There is one camera at the focus of each mirror; two of the cameras contain seven MOS CCDs, while the third uses twelve PN CCDs, defining a circular field of view of 30' diamet…
XMM-Newton observatory. I. The spacecraft and operations
Altieri, B.; Vacanti, G.; Gondoin, P. +12 more
The XMM-Newton Observatory is a cornerstone mission of the European Space Agency's Horizon 2000 programme, and is the largest scientific satellite it has launched to date. This paper summarises the principal characteristics of the Observatory which are pertinent to scientific operations. The scientific results appearing in this issue have been ena…
The Reflection Grating Spectrometer on board XMM-Newton
Kaastra, J. S.; Mewe, R.; Audard, M. +35 more
The ESA X-ray Multi Mirror mission, XMM-Newton, carries two identical Reflection Grating Spectrometers (RGS) behind two of its three nested sets of Wolter I type mirrors. The instrument allows high-resolution (E/Delta E = 100 to 500) measurements in the soft X-ray range (6 to 38 Å, or 2.1 to 0.3 keV) with a maximum effective area of about 140 cm
The XMM-Newton optical/UV monitor telescope
Carter, M.; Pandel, D.; Ho, C. +16 more
The XMM-OM instrument extends the spectral coverage of the XMM-Newton observatory into the ultraviolet and optical range. It provides imaging and time-resolved data on targets simultaneously with observations in the EPIC and RGS. It also has the ability to track stars in its field of view, thus providing an improved post-facto aspect solution for …
ISO spectroscopy of circumstellar dust in 14 Herbig Ae/Be systems: Towards an understanding of dust processing
Waters, L. B. F. M.; van den Ancker, M. E.; Meeus, G. +3 more
We present Infrared Space Observatory (ISO) spectra of fourteen isolated Herbig Ae/Be (HAEBE) stars, to study the characteristics of their circumstellar dust. These spectra show large star-to-star differences, in the emission features of both carbon-rich and oxygen-rich dust grains. The IR spectra were combined with photometric data ranging from t…
The O-Na and Mg-Al anticorrelations in turn-off and early subgiants in globular clusters
Pasquini, L.; Bonifacio, P.; Grundahl, F. +16 more
High dispersion spectra (R>~ 40 000) for a quite large number of stars at the main sequence turn-off and at the base of the giant branch in NGC 6397 and NGC 6752 were obtained with the UVES on Kueyen (VLT UT2). The [Fe/H] values we found are -2.03+/- 0.02+/- 0.04\ and -1.42+/- 0.02+/- 0.04\ for NGC 6397 and NGC 6752 respectively, where the firs…
X-ray imaging-spectroscopy of Abell 1835
Kaastra, J. S.; Arnaud, M.; Fabian, A. C. +6 more
We present detailed spatially-resolved spectroscopy results of the observation of Abell 1835 using the European Photon Imaging Cameras (EPIC) and the Reflection Grating Spectrometers (RGS) on the XMM-Newton observatory. Abell 1835 is a luminous (1046 ergs {s}-1), medium redshift (z=0.2523), X-ray emitting cluster of galaxies.…
Radiation-driven winds of hot luminous stars. XIII. A description of NLTE line blocking and blanketing towards realistic models for expanding atmospheres
Pauldrach, A. W. A.; Hoffmann, T. L.; Lennon, M.
Spectral analysis of hot luminous stars requires adequate model atmospheres which take into account the effects of NLTE and radiation driven winds properly. Here we present significant improvements of our approach in constructing detailed atmospheric models and synthetic spectra for hot luminous stars. Moreover, as we regard our solution method in…
Dust in active nuclei. I. Evidence for ``anomalous'' properties
Maiolino, R.; Marconi, A.; Oliva, E. +5 more
We present observational evidences that dust in the circumnuclear region of AGNs has different properties than in the Galactic diffuse interstellar medium. By comparing the reddening of optical and infrared broad lines and the X-ray absorbing column density we find that the EB-V/N_H ratio is nearly always lower than Galactic by a factor…