Search Publications
Tycho-2 stars with infrared excess in the MSX Point Source Catalogue
Lumsden, S. L.; Oudmaijer, R. D.; Clarke, A. J.
Stars of all evolutionary phases have been found to have excess infrared emission due to the presence of circumstellar material. To identify such stars, we have positionally correlated the infrared Mid-Course Space Experiment (MSX) Point Source Catalogue and the Tycho-2 optical catalogue. Near-mid-infrared colour criteria have been developed to se…
X-ray synchrotron emission from the oblique shock in the jet of the powerful radio galaxy 3C346
Birkinshaw, M.; Worrall, D. M.
We report the first detection, with Chandra, of X-ray emission from the jet of the powerful narrow-line radio galaxy 3C346. X-rays are detected from the bright radio and optical knot at which the jet apparently bends by approximately 70°. The Chandra observation also reveals a bright galaxy-scale atmosphere within the previously known cluster and …
XMM-Newton observations of the ultra-compact binary RX J1914+24
Cropper, Mark; Wu, Kinwah; Ramsay, Gavin +4 more
We present XMM-Newton observations of the 569-s-period system RX J1914+24 (V407 Vul). This period is believed to represent the binary orbital period making it an ultracompact binary system. By comparing the phase of the rise to maximum X-ray flux at various epochs (this includes observations made using ROSAT, ASCA and Chandra) we find that the sys…
The lens and source of the optical Einstein ring gravitational lens ER 0047-2808
Lewis, Geraint F.; Warren, Stephen J.; Hewett, Paul C. +1 more
We perform a detailed analysis of the optical gravitational lens ER 0047-2808 imaged with the Wide Field Planetary Camera 2 on the Hubble Space Telescope. Using software specifically designed for the analysis of resolved gravitational lens systems, we focus on how the image alone can constrain the mass distribution in the lens galaxy. We find that…
An XMM-Newton and Chandra study of the starburst galaxy IC 10
Whitaker, Katherine E.; Wang, Q. Daniel; Williams, Rosa
We present an X-ray study of our nearest starburst galaxy IC 10, based on XMM-Newton and Chandra observations. A list of 73 XMM-Newton and 28 Chandra detections of point-like X-ray sources in the field is provided; a substantial fraction of them are likely stellar objects in the Milky Way due to the low Galactic latitude location of IC 10. The bri…
Chemical abundances of very metal-poor stars
Zhao, G.; Zhang, H. W.
High-resolution and high signal-to-noise ratio spectra of 32 very metal-poor stars were obtained with the Coudé echelle spectrograph mounted on the 2.16-m telescope at the National Astronomical Observatories (Xinglong, China). Equivalent widths of FeI, FeII, OI, NaI, MgI, AlI, SiI, SiII, KI, CaI, ScII, TiI, VI, CrI, MnI, NiI, CuI and BaII lines we…
XMM-Newton 13H deep field - I. X-ray sources
McHardy, I.; Page, M. J.; Seymour, N. +10 more
We present the results of a deep X-ray survey conducted with XMM-Newton, centred on the UK ROSAT13H deep field area. This region covers 0.18 deg2, and is the first of the two areas covered with XMM-Newton as part of an extensive multiwavelength survey designed to study the nature and evolution of the faint X-ray source popula…
CLASS B2108+213: a new wide-separation gravitational lens system
Pearson, T. J.; McKean, J. P.; Treu, T. +15 more
We present observations of CLASS B2108+213, the widest separation gravitational lens system discovered by the Cosmic Lens All-Sky Survey. Radio imaging using the VLA at 8.46 GHz and MERLIN at 5 GHz shows two compact components separated by 4.56 arcsec with a faint third component in between which we believe is emission from a lensing galaxy. 5-GHz…
An XMM-Newton observation of Abell 2597
Fabian, A. C.; Morris, R. Glenn
We report on a 120-ks XMM-Newton observation of the galaxy cluster Abell 2597 (A2597). Results from both the European Photon Imaging Camera (EPIC) and the Reflection Grating Spectrometer (RGS) are presented. From EPIC we obtain radial profiles of temperature, density and abundance, and use these to derive cooling time and entropy. We illustrate co…
Final analysis of ELAIS 15-µm observations: method, reduction and catalogue
Aussel, H.; Pozzi, F.; Franceschini, A. +15 more
We present the final analysis of the European Large Area Infrared Space Observatory (ISO) Survey (ELAIS) 15-µm observations, carried out with the ISO Camera (ISOCAM) instrument on board the ISO.
The data-reduction method, known as the Lari Method, is based on a mathematical model of the behaviour of the detector and was specifically des…