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X-Ray Emission from the Jets of XTE J1550–564

The Astrophysical Journal American Astronomical Society 582:2 (2003) 945-953

Authors:

P Kaaret, S Corbel, JA Tomsick, R Fender, JM Miller, JA Orosz, AK Tzioumis, R Wijnands
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X-Ray Jet Emission from the Black Hole X-Ray Binary XTE J1550–564 with Chandra in 2000

The Astrophysical Journal American Astronomical Society 582:2 (2003) 933-944

Authors:

John A Tomsick, Stéphane Corbel, Rob Fender, Jon M Miller, Jerome A Orosz, Tasso Tzioumis, Rudy Wijnands, Philip Kaaret
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Geodetic Precession in PSR B1913+16

ArXiv astro-ph/0301146 (2003)

Authors:

M Kramer, O Loehmer, A Karastergiou

Abstract:

We review the observational evidence for geodetic precession in PSR B1913+16 and present the latest observations and results from modelling the system geometry and beam.
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Galaxies in southern bright star fields. I. Near-infrared imaging

Astronomy and Astrophysics 406:2 (2003) 593-601

Authors:

AJ Baker, RI Davies, MD Lehnert, NA Thatte, WD Vacca, OR Hainaut, MJ Jarvis, GK Miley, HJA Röttgering

Abstract:

As a prerequisite for cosmological studies using adaptive optics techniques, we have begun to identify and characterize faint sources in the vicinity of bright stars at high Galactic latitudes. The initial phase of this work has been a program of Ks imaging conducted with SOFI at the ESO NTT. From observations of 42 southern fields evenly divided between the spring and autumn skies, we have identified 391 additional stars and 1589 galaxies lying at separations Δθ ≤ 60″ from candidate guide stars in the magnitude range 9.0 ≤ R ≤ 12.4. When analyzed as a "discrete deep field" with 131 arcmin2 area, our dataset gives galaxy number counts that agree with those derived previously over the range 16 ≤ Ks < 20.5. This consistency indicates that in the aggregate, our fields should be suitable for future statistical studies. We provide our source catalogue as a resource for users of large telescopes in the southern hemisphere.
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ISO photometry of hyperluminous infrared galaxies: Implications for the origin of their extreme luminosities

European Space Agency Special Publication ESA SP (2003) 301-304

Authors:

A Verma, M Rowan-Robinson, R McMahon, A Efstathiou

Abstract:

We present 7-180μm photometry of a sample of hyperluminous infrared galaxies (HyLIGs) obtained with the photometer and camera mounted on the Infrared Space Observatory (ISO). We have used state-of-the-art' radiative transfer models of obscured starbursts and dusty tori to model their broadband spectral energy distributions (SEDs). We find that IRAS F00235+1024, IRAS F14218+3845 and IRAS F15307+3252 require a combination of starburst and AGN components to explain their mid to far-infrared emission, while for TXS0052+471 a dust torus model alone is sufficient. For IRAS F00235+1024 and IRAS F14218+3845 the starburst component is the predominant contributor whereas for IRAS F15307+3252 the dust torus component dominates. The implied star formation rates (SFR) estimated from the starburst infrared luminosities are dM*,all/dt > 1000M⊙yr-1h50-2 and are amongst the highest SFRs estimated to date. We also demonstrate that the well-known radio-FIR correlation observed for extragalactic sources extends into both higher radio and infrared power than previously investigated. The relation for HyLIGs has a mean q value of 1.94. The results of this study imply that better sampling of the IR SEDs of HyLIGs may reveal that both AGN and starburst components are required to explain their emission from the NIR to the sub-millimetre.