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The X-ray/UV absorber in NGC 4593
Kaastra, J. S.; Kriss, G. A.; Costantini, E. +2 more
We present the results of a recent (2011 March) 160 ks Chandra-LETGS (Low Energy Transmission Grating Spectrometre) observation of the Seyfert galaxy NGC 4593, and the analysis of archival X-ray and UV spectra taken with XMM-Newton and Hubble Space Telescope (HST)/STIS (Space Telescope Imaging Spectrograph) in 2002. We find evidence of a multi-com…
Mining the Herschel-Astrophysical Terahertz Large Area Survey: submillimetre-selected blazars in equatorial fields
Ivison, R. J.; Sutherland, W.; Bonavera, L. +29 more
The Herschel-Astrophysical Terahertz Large Area Survey (H-ATLAS) provides an unprecedented opportunity to search for blazars at sub-mm wavelengths. We cross-matched the Faint Images of the Radio Sky at Twenty-cm (FIRST) radio source catalogue with the 11 655 sources brighter than 35 mJy at 500 µm in the ∼135 deg2 of the sky covere…
Extended and filamentary Lyα emission from the formation of a protogalactic halo at z = 2.63
Rauch, Michael; Haehnelt, Martin G.; Sargent, Wallace L. W. +2 more
We report the observation of a further asymmetric, extended Lyα emitting halo at z = 2.63, from our ultra-deep, long-slit spectroscopic survey of faint high-redshift emitters, undertaken with Magellan LDSS3 in the GOODS-S field. The Lyα emission, detected over more than 30 kpc, is spatially coincident with a statistically significant concentration…
Decoupling absorption and continuum variability in the Seyfert 2 NGC 4507
Ptak, A.; Turner, T. J.; Ballo, L. +3 more
We present the results of the Suzaku observation of the Seyfert 2 galaxy NGC 4507. This source is one of the X-ray brightest Compton-thin Seyfert 2s and a candidate for a variable absorber. Suzaku caught NGC 4507 in a highly absorbed state characterized by a high column density (NH ∼ 8 × 1023 cm-2), a strong reflec…
Discovering a 5.72-d period in the supergiant fast X-ray transient AX J1845.0-0433
Hill, A. B.; Sidoli, L.; Bird, A. J. +5 more
Temporal analysis of INTEGRAL/IBIS data has revealed a 5.7195 ± 0.0007 d periodicity in the supergiant fast X-ray transient source AX J1845.0-0433, which we interpret as the orbital period of the system. The new-found knowledge of the orbital period is utilized to investigate the geometry of the system by means of estimating an upper limit for the…
A new population of planetary nebulae discovered in the Large Magellanic Cloud (IV): the outer LMC
Parker, Quentin A.; Reid, Warren A.
We have extended our planetary nebulae (PNe) survey to the outer ∼64 deg2 of the Large Magellanic Cloud (LMC) using maps from the Magellanic Cloud Emission Line Survey (MCELS) and the UK Schmidt Telescope (UKST) Hα survey. Although the MCELS survey has poorer ∼5 arcsec resolution than both the UKST Hα survey and the original Hα median s…
XMM-Newton observations of the Galactic Centre Region - II. The soft-thermal emission
Warwick, R. S.; Heard, V.
We have extended our earlier study of the X-ray emission emanating from the central 100 pc × 100 pc region of our Galaxy to an investigation of several features prominent in the soft X-ray (2-4.5 keV) band. We focus on three specific structures: a putative bipolar outflow from the vicinity of Sgr A*; a high surface brightness region located roughl…
Lyman Break and ultraviolet-selected galaxies at z ∼ 1 - II. PACS 100 µm/160 µm FIR detections
Berta, S.; Magnelli, B.; Lutz, D. +53 more
In this work, we report the Photodetector Array Camera and Spectrometer (PACS) 100 µm/160 µm detections of a sample of 42 GALEX-selected and far-infrared (FIR)-detected Lyman break galaxies (LBGs) at z ∼ 1 located in the Cosmic Evolution Survey (COSMOS) field and analyse their ultraviolet (UV) to FIR properties. The detection of these …
VLT/VIMOS observations of an occulting galaxy pair: redshifts and effective extinction curve
Dalcanton, J. J.; Böker, T.; Holwerda, B. W. +2 more
We present Very Large Telescope/Visible Multiobject Spectrograph Integral Field Unit observations of an occulting galaxy pair previously discovered in Hubble Space Telescope (HST) observations. The foreground galaxy is a low-inclination spiral disc, which causes clear attenuation features seen against the bright bulge and disc of the background ga…
Optical IFU observations of gas pillars surrounding the super star cluster NGC 3603
Smith, L. J.; Westmoquette, M. S.; Ercolano, B. +1 more
We present optical integral field unit observations of two gas pillars surrounding the Galactic young massive star cluster NGC 3603. The high S/N and spectral resolution of these data have allowed us to accurately quantify the Hα, [N II] and [S II] emission line shapes, and we find a mixture of broad (FWHM ∼ 70-100 km s-1) and narrow (&…