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The Sloan Digital Sky Survey Quasar Catalog. IV. Fifth Data Release
Castander, Francisco J.; Brandt, W. N.; Shen, Yue +41 more
We present the fourth edition of the Sloan Digital Sky Survey (SDSS) Quasar Catalog. The catalog contains 77,429 objects; this is an increase of over 30,000 entries since the previous edition. The catalog consists of the objects in the SDSS Fifth Data Release that have luminosities larger than Mi=-22.0 (in a cosmology with H0…
The Infrared Camera (IRC) for AKARI -- Design and Imaging Performance
Pearson, C. P.; Ohyama, Y.; Takagi, T. +25 more
The Infrared Camera (IRC) is one of two focal-plane instruments on the AKARI satellite. It is designed for wide-field deep imaging and low-resolution spectroscopy in the near- to mid-infrared (1.8-26.5'
Piecing together the X-ray background: bolometric corrections for active galactic nuclei
Fabian, A. C.; Vasudevan, R. V.
The X-ray background can be used to constrain the accretion history of supermassive black holes (SMBHs) in active galactic nuclei (AGN), with the SMBH mass density related to the energy density due to accretion. A knowledge of the hard X-ray bolometric correction, κ2-10keV, is a vital input into these studies, as it allows us to constra…
Extremely fast acceleration of cosmic rays in a supernova remnant
Maeda, Yoshitomo; Takahashi, Tadayuki; Uchiyama, Yasunobu +2 more
Galactic cosmic rays (CRs) are widely believed to be accelerated by shock waves associated with the expansion of supernova ejecta into the interstellar medium. A key issue in this long-standing conjecture is a theoretical prediction that the interstellar magnetic field can be substantially amplified at the shock of a young supernova remnant (SNR) …
The Sloan Lens ACS Survey. IV. The Mass Density Profile of Early-Type Galaxies out to 100 Effective Radii
Treu, Tommaso; Gavazzi, Raphaël; Koopmans, Léon V. E. +5 more
We present a weak-lensing analysis of 22 early-type (strong) lens galaxies, based on deep HST images obtained as part of the Sloan Lens ACS Survey. Using advanced techniques to control systematic uncertainties, we show that weak-lensing signal is detected out to ~300 h-1 kpc (at the mean lens redshift z=0.2). We analyze blank control fi…
The Rosetta Mission: Flying Towards the Origin of the Solar System
Richter, Ingo; Glassmeier, Karl-Heinz; Kührt, Ekkehard +2 more
The ROSETTA Mission, the Planetary Cornerstone Mission in the European Space Agency's long-term programme Horizon 2000, will rendezvous in 2014 with comet 67P/Churyumov-Gerasimenko close to its aphelion and will study the physical and chemical properties of the nucleus, the evolution of the coma during the comet's approach to the Sun, and the deve…
Evidence for Alfvén Waves in Solar X-ray Jets
Weber, M.; Golub, L.; Kano, R. +11 more
Coronal magnetic fields are dynamic, and field lines may misalign, reassemble, and release energy by means of magnetic reconnection. Giant releases may generate solar flares and coronal mass ejections and, on a smaller scale, produce x-ray jets. Hinode observations of polar coronal holes reveal that x-ray jets have two distinct velocities: one nea…
The X-Ray Telescope onboard Suzaku
Maeda, Yoshitomo; Ishida, Manabu; Kunieda, Hideyo +31 more
Monte Carlo Simulator and Ancillary Response Generator of Suzaku XRT/XIS System for Spatially Extended Source Analysis
Hamaguchi, Kenji; Miller, Eric D.; Maeda, Yoshitomo +31 more
We have developed a framework for the Monte Carlo simulations of X-Ray Telescope (XRT) and X-ray Imaging Spectrometer (XIS) on board Suzaku, mainly for the scientific analysis of spatially and spectroscopically complex celestial sources. A photon-by-photon instrumental simulator is built on the ANL platform, which has been successfully used in ASC…
The Masses of Nuclear Black Holes in Luminous Elliptical Galaxies and Implications for the Space Density of the Most Massive Black Holes
Filippenko, Alexei V.; Ho, Luis C.; Gebhardt, Karl +11 more
Black hole (BH) masses predicted from the M•-σ relationship conflict with predictions from the M•-L relationship for high-luminosity galaxies, such as brightest cluster galaxies (BCGs). The M•-L relationship predicts that some BCGs may harbor BHs with M• approaching 1010 Msolar, whi…