The First Swift Ultra-Violet/Optical Telescope GRB Afterglow CatalogWe present the first Swift Ultra-Violet/Optical Telescope (UVOT) gamma-ray burst (GRB) afterglow catalog. The catalog contains data from over 64,000 independent UVOT image observations of 229 GRBs…P. W. A. Roming, T. S. Koch, S. R. Oates et al.·Sep 24, 2008SaveLearn
Giant outburst of EXO 2030+375: pulse-phase resolved analysis of INTEGRAL dataIn June-September 2006 the Be/X-ray binary EXO 2030+375 experienced the second giant outburst since its discovery. The source was shown to have a complicated pulse-averaged X-ray spectral continuum…D. Klochkov, A. Santangelo, R. Staubert et al.·Sep 24, 2008SaveLearn
Quantitative Stellar Spectral Classification. IV. Application to the Open Cluster IC 2391In this work we perform the first test of a stellar spectral classification method (Stock & Stock 1999) by applying it to early type stars. The sample of stars are the members of the open cluster IC…J. García, N. Sánchez, R. Velásquez·Sep 24, 2008SaveLearn
The Chemical Enrichment History of the Magellanic Clouds Field PopulationsWe report the results of our project devoted to study the chemical enrichment history of the field population in the Magellanic Clouds using Ca II triplet spectroscopy.R. Carrera, C. Gallart, A. Aparicio et al.·Sep 24, 2008SaveLearn
HCN(1-0) enhancement in the bar of NGC 2903We have mapped the emission from two spiral galaxies, NGC2903 and NGC3504 to study the gas properties in the bars. The HCN(1-0) emission is detected in the center and along the bar of NGC2903.…S. Leon, S. Jeyakumar, D. Perez-Ramirez et al.·Sep 24, 2008SaveLearn
Deep 610-MHz Giant Metrewave Radio Telescope observations of the Spitzer extragalactic First Look Survey field - III. The radio properties of Infrared-Faint Radio SourcesInfrared-Faint Radio Sources (IFRSs) are a class of source which are bright at radio frequencies, but do not appear in deep infrared images. We report the detection of 14 IFRSs within the Spitzer…Timothy Garn, Paul Alexander·Sep 24, 2008SaveLearn
Astrometric effects of non-uniform telescope throughputIn real telescopes, the optical parameters evolve with time, and the degradation is often not uniform. This introduces variations in the image profile and therefore photo-centre displacements which,…M. Gai, R. Cancelliere·Sep 24, 2008SaveLearn
Enhanced Dust Emission in the HL Tau Disc: A Low-Mass Companion in Formation?We have imaged the disc of the young star HL Tau using the VLA at 1.3 cm, with 0.08" resolution (as small as the orbit of Jupiter). The disc is around half the stellar mass, assuming a canonical…J. S. Greaves, A. M. S. Richards, W. K. M. Rice et al.·Sep 24, 2008SaveLearn
Gas Evolution in Protoplanetary DisksThis article summarizes a Splinter Session at the Cool Stars XV conference in St. Andrews with 3 review and 4 contributed talks. The speakers have discussed various approaches to understand the…Peter Woitke, Bill Dent, Wing-Fai Thi et al.·Sep 24, 2008SaveLearn
A Dynamical Classification of the Cosmic WebA dynamical classification of the cosmic web is proposed. The large scale environment is classified into four web types: voids, sheets, filaments and knots. The classification is based on the…J. E. Forero-Romero, Y. Hoffman, S. Gottloeber et al.·Sep 24, 2008SaveLearn
Discovery of X-ray emission from the eclipsing brown-dwarf binary 2MASS J05352184-0546085The eclipsing brown-dwarf binary system 2MASS J05352184-0546085 is a case sui generis. For the first time, it allows a detailed analysis of the individual properties of young brown dwarfs, in…S. Czesla, P. C. Schneider, J. H. M. M. Schmitt·Sep 24, 2008SaveLearn
Gauging the dark matter fraction in a L* S0 galaxy at z=0.47 through gravitational lensing from deep HST/ACS imagingWe analyze a new gravitational lens, OAC-GL J1223-1239, serendipitously found in a deep I-band image of the Hubble Space Telescope (HST) Advanced Camera for Surveys (ACS). The lens is a L*, edge-on…G. Covone, M. Paolillo, N. R. Napolitano et al.·Sep 24, 2008SaveLearn
A Deep 150 MHz GMRT Survey in EridanusWe present results of a 150 MHz survey of a field centered on Epsilon Eridani, undertaken with the Giant Metrewave Radio Telescope (GMRT). The survey covers an area with a diameter of 2 deg, has a…Samuel J. George, Ian R. Stevens·Sep 24, 2008SaveLearn
Constraining Cosmology with High Convergence Regions in Weak Lensing SurveysWe propose to use a simple observable, the fractional area of "hot spots" in weak gravitational lensing mass maps which are detected with high significance, to determine background…Sheng Wang, Zoltán Haiman, Morgan May·Sep 24, 2008SaveLearn
Properties of the Youngest Protostars in Perseus, Serpens, and OphiuchusWe present an unbiased census of deeply embedded protostars in Perseus, Serpens, and Ophiuchus, assembled by combining large-scale 1.1 mm Bolocam continuum and Spitzer Legacy surveys. We identify…Melissa L. Enoch, Neal J. Evans, Anneila I. Sargent et al.·Sep 24, 2008SaveLearn
Consistently Large Cosmic Flows on Scales of 100 Mpc/h: a Challenge for the Standard LCDM CosmologyPeculiar velocity surveys have non-uniform spatial distributions of tracers, so that the bulk flow estimated from them does not correspond to that of a simple volume such as a sphere. Thus bulk flow…Richard Watkins, Hume A. Feldman, Michael J. Hudson·Sep 23, 2008SaveLearn
The Advanced X-ray Timing Array (AXTAR)AXTAR is an X-ray observatory mission concept, currently under study in the U.S., that combines very large collecting area, broadband spectral coverage, high time resolution, highly flexible…Deepto Chakrabarty, Paul S. Ray, Tod E. Strohmayer·Sep 23, 2008SaveLearn
Extragalactic Point Source Search in Five-year WMAP 41, 61 and 94 GHz MapsWe present the results of an extragalactic point source search using the five-year WMAP 41, 61 and 94 GHz (Q-, V- and W-band) temperature maps. This work is an extension of our point source search in…Xi Chen, Edward L. Wright·Sep 23, 2008SaveLearn
The Inconvenient Truth About Coronal DimmingsWe investigate the occurrence of a CME-driven coronal dimming using unique high resolution spectral images of the corona from the Hinode spacecraft. Over the course of the dimming event we observe…Scott W. McIntosh·Sep 23, 2008SaveLearn
A global autocorrelation study after the first Auger data: impact on the number density of UHECR sourcesWe perform an autocorrelation study of the Auger data with the aim to constrain the number density ns of ultrahigh energy cosmic ray (UHECR) sources, estimating at the same time the effect on ns…A. Cuoco, S. Hannestad, T. Haugboelle et al.·Sep 23, 2008SaveLearn
Infall Regions and Scaling Relations of X-ray Selected GroupsWe use the Fifth Data Release of the Sloan Digital Sky Survey to study X-ray-selected galaxy groups and compare their properties to clusters. We search for infall patterns around the groups and use…Kenneth Rines, Antonaldo Diaferio·Sep 23, 2008SaveLearn
Cryptic photosynthesis, Extrasolar planetary oxygen without a surface biological signatureOn the Earth, photosynthetic organisms are responsible for the production of virtually all of the oxygen in the atmosphere. On the land, vegetation reflects in the visible, leading to a red edge that…C. S. Cockell, L. Kaltenegger, J. A. Raven·Sep 23, 2008SaveLearn
Searching for modified growth patterns with tomographic surveysIn alternative theories of gravity, designed to produce cosmic acceleration at the current epoch, the growth of large scale structure can be modified. We study the potential of upcoming and future…Gong-Bo Zhao, Levon Pogosian, Alessandra Silvestri et al.·Sep 23, 2008SaveLearn
The structure of the protoplanetary disk surrounding three young intermediate mass stars. II. Spatially resolved dust and gas distribution[Abridged] We present the first direct comparison of the distribution of the gas, as traced by the [OI] 6300 AA emission, and the dust, as traced by the 10 micron emission, in the protoplanetary disk…D. Fedele, M. E. van den Ancker, B. Acke et al.·Sep 23, 2008SaveLearn
UHECRs from the Radio Lobes of AGNsWe report a stochastic mechanism of particle acceleration from first principles in an environment having properties like those of Radio Lobes in AGNs. We show that energies 1020 eV are…F. Fraschetti, F. Melia·Sep 23, 2008SaveLearn