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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…
Erratum: The XMM Large-Scale Structure survey: an initial sample of galaxy groups and clusters to a redshift z < 0.6
Altieri, B.; Valtchanov, I.; Pierre, M. +14 more
We present X-ray and optical spectroscopic observations of twelve galaxy groups and clusters identified within the XMM Large-Scale Structure (LSS) survey. Groups and clusters are selected as extended X-ray sources from a 3.5 deg2 XMM image mosaic above a flux limit 8e-15 ergs/s/cm2 in the [0.5-2] keV energy band. Deep BVRI images and multi-object …
Photon scattering in the solar ultraviolet lines of HeI and HeII
Jordan, C.; Houdebine, E. R.; Smith, G. R.
Observations made with the Coronal Diagnostic Spectrometer (CDS) onboard the Solar and Heliospheric Observatory (SOHO) are used to investigate the behaviour of the intensities of the emission lines of HeI, HeII and OIII at the quiet Sun-centre and at θ= 60° towards the equatorial limb. The aim is to examine the possible effects of photon scatterin…
Physical properties as indicators of liquid compositions: Derivation of the composition for Titan's surface liquids from the Huygens SSP measurements
Lorenz, R. D.; Hagermann, A.; Leese, M. R. +5 more
We present a method for inferring the relative molar abundance of constituents of a liquid mixture, in this case methane, ethane, nitrogen and argon, from a measurement of a set of physical properties of the mixture. This problem is of interest in the context of the Huygens Surface Science Package, SSP, equipped to measure several physical propert…
Tentative detection of warm intervening gas towards PKS 0548-322 with XMM-Newton
Sako, M.; Barcons, X.; Carrera, F. J. +2 more
We present the results of a long (~93 ks) XMM-Newton observation of the bright BL-Lac object PKS 0548-322 (z= 0.069). Our Reflection Grating Spectrometer (RGS) spectrum shows a single absorption feature at an observed wavelength λ= 23.33 +/- 0.01 Å, which we interpret as OVI Kα absorption at z= 0.058, i.e. ~3000 km s-1 from the backgrou…
The XMM-Newton/2dF survey - VIII. The extended X-ray sources
Georgakakis, A.; Georgantopoulos, I.; Plionis, M. +2 more
We present a sample of eight extended X-ray sources detected in the wide-field (~2.3 deg2), bright (2-10 ks) XMM-Newton/2dF survey, reaching a flux limit of ~2 × 10-14 erg s-1 cm-2. Of these, seven are identified as secure X-ray clusters in the soft 0.3-2 keV band using a standard wavelet algorithm on ei…
Vigorous star formation in a bulge-dominated extremely red object at z= 1.34
Simpson, Chris; Cotter, Garret; Bolton, Rosemary C.
We present near-infrared (near-IR) spectroscopy of three extremely red objects (EROs) using the OHS/CISCO spectrograph at the Subaru Telescope. One target exhibits a strong emission line, which we identify as Hα at z= 1.34. Using new and existing ground-based optical and near-IR imaging, and archival Hubble Space Telescope imaging, we argue that t…