Search Publications
The INTEGRAL spectrometer SPI: performance of point-source data analysis
Knödlseder, J.; von Kienlin, A.; Bouchet, L. +9 more
The performance of the SPI point-source data analysis system is assessed using a combination of simulations and of observations gathered during the first year of INTEGRAL operations. External error estimates are derived by comparing source positions and fluxes obtained from independent analyses. When the source detection significance provided by t…
Kinematics of ionized gas in the barred Seyfert galaxy NGC 4151
Mundell, C. G.; Pedlar, A.; Asif, M. W.
We have determined the structure and kinematics of ionized gas in the weak oval bar of the archetypal Seyfert 1 galaxy, NGC 4151, using the TAURUS Fabry-Perot interferometer to simultaneously map the distribution and kinematics of Hβ emission. We also present broad-band ultraviolet imaging of the host galaxy, obtained with XMM-Newton, which shows …
Cold dust in (some) high-z supernova host galaxies
Clements, D. L.; Farrah, D.; Fox, M. +3 more
We present deep submillimetre photometry for 14 galaxies at z= 0.5 that are hosts of Type Ia supernovae, with the aim of examining the evolution of dust mass and extinction in normal galaxies. We combine these results with our previous observations of 17 z~ 0.5 SN1a hosts to look for any evolution in the dust content of normal galaxies between z= …
Erratum: A high-velocity ionized outflow and XUV photosphere in the narrow emission line quasar PG1211+143
O'Brien, P. T.; King, A. R.; Reeves, J. N. +3 more
HT Camelopardalis: the simplest intermediate polar spin pulse
Hellier, Coel; Evans, P. A.
The intermediate polar (IP) HT Cam is unusual in that it shows no evidence for dense absorption in its spectrum. We analyse an XMM-Newton observation of this star, which confirms the absence of absorption and shows that the X-ray spin pulse is energy independent. The modulation arises solely from occultation effects and can be reproduced by a simp…
GRB 050223: a faint gamma-ray burst discovered by Swift
Campana, S.; Tagliaferri, G.; Cusumano, G. +16 more
GRB 050223 was discovered by the Swift Gamma-Ray Burst Explorer on 2005 February 23 and was the first gamma-ray burst (GRB) to be observed by both Swift and XMM-Newton. At the time of writing (2005 May), it has one of the faintest GRB afterglows ever observed. The spacecraft could not slew immediately to the burst, so the first X-ray and optical o…
X-ray absorption and re-emission from an ionized outflow in the Type 1 quasi-stellar object 2MASS 234449+1221 observed by XMM-Newton
Wilkes, B. J.; Page, K. L.; Pounds, K. A.
We report on the analysis of a short XMM-Newton observation of the reddened Type 1 quasi-stellar object (QSO) 2MASS 234449+1221 first identified in the Two-Micron All-Sky Survey (2MASS). The underlying X-ray continuum is found to be typical of a broad-line active galaxy, with photon index Γ~ 1.9. Low-energy absorption can be modelled by a column N…
Morphological studies of the Spitzer Wide-Area Infrared Extragalactic survey galaxy population in the UGC 10214 Hubble Space Telescope/Advanced Camera for Surveys field
Pérez-Fournon, I.; Rodighiero, G.; Hatziminaoglou, E. +16 more
We present the results of a morphological analysis of a small subset of the Spitzer Wide-Area Infrared Extragalactic survey (SWIRE) galaxy population. The analysis is based on public Advanced Camera for Surveys (ACS) data taken inside the SWIRE N1 field, which are the deepest optical high-resolution imaging available within the SWIRE fields as of …
A far-infrared view of the Lockman hole from ISO 95-µm observations - II. Optical identifications and insights into the nature of the far-infrared sources
Rodighiero, G.; Franceschini, A.; Lari, C. +1 more
We present the optical identifications of a 95-µm ISOPHOT sample in the Lockman hole over an area of approximately half a deg2. The Rodighiero et al. catalogue includes 36 sources, making up a complete flux-limited sample for S95µm>= 100 mJy. Reliable sources were detected, with decreasing but well-controlled c…
Einstein-de Sitter model re-examined for newly discovered Type Ia supernovae
Vishwakarma, R. G.
The consistency of the Einstein-de Sitter model with the Type Ia supernovae (SNe Ia) recently observed by the Hubble Space Telescope is examined. The model shows a reasonable fit to the observations, if account is taken of the extinction of SN light by the intergalactic metallic dust ejected from the SN explosions. Although the fit to the new data…