Search Publications
XMM-Newton observations of the Galactic Centre Region - I. The distribution of low-luminosity X-ray sources
Warwick, R. S.; Heard, V.
We exploit XMM-Newton archival data in a study of the extended X-ray emission emanating from Galactic Centre (GC) region. XMM-Newton EPIC-pn and EPIC-MOS observations, with a total exposure time approaching 0.5 and 1 Ms, respectively, were used to create mosaicked images of a 100 pc × 100 pc region centred on Sgr A* in four bands covering the 2-10…
The thermal dust emission in N158-N159-N160 (LMC) star-forming complex mapped by Spitzer, Herschel and LABOCA
van Loon, J. Th.; Okumura, K.; Lebouteiller, V. +21 more
Low-metallicity galaxies exhibit different properties of the interstellar medium (ISM) compared to nearby spiral galaxies. Obtaining a resolved inventory of the various gas and dust components of massive star-forming regions and diffuse ISM is necessary to understand how those differences are driven. We present a study of the infrared/submillimetr…
On the nature of the hard X-ray sources SWIFT J1907.3-2050, IGR J12123-5802 and IGR J19552+0044
Mukai, K.; de Martino, D.; Masetti, N. +7 more
The INTEGRAL and Swift hard X-ray surveys have identified a large number of new sources, among which many are proposed as Cataclysmic Variables (CVs). Here, we present the first detailed study of three X-ray-selected CVs, Swift J1907.3-2050, IGR J12123-5802 and IGR J19552+0044 based on XMM-Newton, Suzaku, Swift observations and ground-based optica…
Two new ultracool benchmark systems from WISE+2MASS
Marocco, F.; Pinfield, D. J.; Jones, H. R. A. +6 more
We have used the Two-Micron All-Sky Survey and the Wide-field Infrared Survey Explorer to look for ultracool dwarfs that are part of multiple systems containing main-sequence stars. We cross-matched L dwarf candidates from the surveys with Hipparcos and Gliese stars, finding two new systems. The first system, G255-34AB, is an L2 dwarf companion to…
The star formation history of the Large Magellanic Cloud star clusters NGC 1846 and NGC 1783
Girardi, Léo; Marigo, Paola; Goudfrooij, Paul +4 more
NGC 1846 and NGC 1783 are two massive star clusters in the Large Magellanic Cloud, hosting both an extended main-sequence turn-off and a dual clump of red giants. They present similar masses but differ mainly in angular size. Starting from their high-quality ACS data in the F435W, F555W and F814W filters, and updated sets of stellar evolutionary t…
The XMM-Large Scale Structure catalogue - II. X-ray sources and associated multiwavelength data
Chiappetti, L.; Pierre, M.; Surdej, J. +8 more
We present the final release of the multiwavelength XMM-Large Scale Structure (LSS) data set, covering the full survey area of 11.1 deg2, with X-ray data processed with the latest XMM-LSS pipeline version. The present publication supersedes the catalogue from the first paper in this series, pertaining to the initial 5 deg2. W…
X-ray properties of BzK-selected galaxies in the deepest X-ray fields
Nandra, K.; Laird, E. S.; Rangel, C. +1 more
We investigate the X-ray properties of BzK-selected galaxies at z ∼ 2 using deep X-ray data in the Chandra Deep Field-South (CDFS) and Chandra Deep Field-North (CDFN). A subset of these BzK galaxies have been proposed as Compton-thick active galactic nucleus (AGN) candidates based on a high ratio of infrared (IR) to ultraviolet (UV) star formation…
Resolving the coronal line region of NGC 1068 with near-infrared integral field spectroscopy
Komossa, S.; McGregor, Peter J.; Rodríguez-Ardila, A. +1 more
We present adaptive optics-assisted J- and K-band integral field spectroscopy of the inner 300 × 300 pc of the Seyfert 2 galaxy NGC 1068. The data were obtained with the Gemini Near-infrared Integral-Field Spectrograph integral field unit spectrometer, which provided us with high-spatial and high-spectral resolution sampling. The wavelength range …
The lack of star formation gradients in galaxy groups up to z ∼ 1.6
Finoguenov, A.; Berta, S.; Magnelli, B. +28 more
In the local Universe, galaxy properties show a strong dependence on environment. In cluster cores, early-type galaxies dominate, whereas star-forming galaxies are more and more common in the outskirts. At higher redshifts and in somewhat less dense environments (e.g. galaxy groups), the situation is less clear. One open issue is that of whether a…
Long-term monitoring of PKS 0537-441 with Fermi-LAT and multiwavelength observations
Covino, S.; Pian, E.; Sbarufatti, B. +21 more
We report on multiwavelength observations of the blazar PKS 0537-441 (z = 0.896) obtained from microwaves through γ-rays by Submillimeter Array, Rapid Eye Mounting, Automatic Telescope for Optical Monitoring (ATOM), Swift and Fermi mostly during 2008 August-2010 April. Strong variability has been observed in γ-rays, with two major flaring episodes…