40.2k citations
Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.
- Centre National de la Recherche ScientifiqueFR2.5k papers
- European Southern ObservatoryCL1.5k papers
- Max Planck SocietyDE1.4k papers
- National Institute for AstrophysicsIT1.4k papers
- Center for Astrophysics Harvard & SmithsonianUS1.4k papers
- Ludwig-Maximilians-Universität MünchenDE1.4k papers
- Leiden UniversityNL1.3k papers
- California Institute of TechnologyUS1.2k papers
- Commissariat à l'Énergie Atomique et aux Énergies AlternativesFR1.2k papers
- Max Planck Institute for AstronomyDE1.1k papers
- University of CambridgeGB950 papers
- University College LondonGB919 papers
330 papers · 1 filter
Optical Spectral Properties of Swift BAT Hard X-ray Selected Active Galactic Nuclei Sources
Lisa M. Winter, Karen T. Lewis, Michael Koss +3
The Swift Burst Alert Telescope (BAT) survey of Active Galactic Nuclei (AGN) is providing an unprecedented view of local AGNs (<z> = 0.03) and their host galaxy properties. In this…
Identification and properties of the photospheric emission in GRB090902B
F. Ryde, M. Axelsson, B. B. Zhang +19
The Fermi Gamma-ray Space Telescope observed the bright and long GRB090902B, lying at a redshift of z = 1.822. Together the Large Area Telescope (LAT) and the Gamma-ray Burst Monit…
Characterizing black hole variability with nonlinear methods: the case of the X-ray Nova 4U 1543-47
M. Gliozzi, C. Raeth, I. E. Papadakis +1
We investigate the possible nonlinear variability properties of the black hole X-ray nova 4U1543-47 to complement the temporal studies based on linear techniques, and to search for…
Substructure of the galaxy clusters in the REXCESS sample: observed statistics and comparison to numerical simulations
H. Boehringer, G. W. Pratt, M. Arnaud +6
We study the substructure statistics of a representative sample of galaxy clusters by means of two currently popular substructure characterisation methods, power ratios and centroi…
On the Initial Mass Function and tilt of the Fundamental Plane of massive early-type galaxies
C. Grillo, R. Gobat
We investigate the most plausible stellar Initial Mass Function (IMF) and the main origin of the tilt of the Fundamental Plane (FP) for old, massive early-type galaxies. We conside…
XMM-Newton long-look observation of the narrow line Seyfert 1 galaxy PKS0558-504; I: Spectral analysis
I. E. Papadakis, W. Brinkmann, M. Gliozzi +3
We present results from the spectral analysis of a long XMM-Newton observation of the radio-loud NLS1 galaxy PKS0558-504. The source is highly variable, on all sampled time scales.…
Measurements of Secondary Cosmic Microwave Background Anisotropies with the South Pole Telescope
M. Lueker, C. L. Reichardt, K. K. Schaffer +40
We report cosmic microwave background (CMB) power spectrum measurements from the first 100 sq. deg. field observed by the South Pole Telescope (SPT) at 150 and 220 GHz. On angular…
Integrating the Fermi Gamma-Ray Burst Monitor into the 3rd Interplanetary Network
K. Hurley, M. Briggs, V. Connaughton +35
We are integrating the Fermi Gamma-Ray Burst Monitor (GBM) into the Interplanetary Network (IPN) of Gamma-Ray Burst (GRB) detectors. With the GBM, the IPN will comprise 9 experimen…
The X-ray to optical-UV luminosity ratio of X-ray selected Type 1 AGN in XMM-COSMOS
E. Lusso, A. Comastri, C. Vignali +29
We present a study of the X-ray to optical properties of a sample of 545 X-ray selected Type 1 AGN, from the XMM-COSMOS survey, over a wide range of redshifts ($0.04<\z<4.25$) and…
Fermi-LAT Observation of Quiet Solar Emission
Elena Orlando, Nicola Giglietto
The Large Area Telescope (LAT) on board Fermi has detected high-energy gamma rays from the quiet Sun produced by interactions of cosmic-ray nucleons with the solar surface and cosm…
Fermi observations of Cassiopeia and Cepheus: diffuse gamma-ray emission in the outer Galaxy
LAT collaboration
We present the analysis of the interstellar gamma-ray emission measured by the Fermi Large Area Telescope toward a region in the second Galactic quadrant at 100 deg < l < 145 deg a…
Dust Properties of Protoplanetary Disks in the Taurus-Auriga Star Forming Region from Millimeter Wavelengths
L. Ricci, L. Testi, A. Natta +3
We present the most sensitive 3 mm-survey to date of protoplanetary disks carried in the Taurus-Auriga star forming region (average rms of about 0.3 mJy), using the IRAM PdBI. With…
Magnetar Twists: Fermi/Gamma ray Burst Monitor (GBM) detection of SGR J1550-5418
Y. Kaneko, E. Gogus, C. Kouveliotou +12
SGR J1550-5418 (previously known as AXP 1E 1547.0-5408 or PSR J1550-5418) went into three active bursting episodes in 2008 October and in 2009 January and March, emitting hundreds…
The Magellanic Bridge: evidence for a population of X-ray binaries
V. A. McBride, A. J. Bird, M. J. Coe +3
INTEGRAL observations of the Small Magellanic Cloud region have resulted in the serendipitous detection of two transient hard X-ray sources in the Magellanic Bridge. In this paper…
Be/X-ray binary SXP6.85 undergoes large Type II outburst in the Small Magellanic Cloud
L. J. Townsend, M. J. Coe, V. A. McBride +6
The Small Magellanic Cloud (SMC) Be/X-ray binary pulsar SXP6.85 = XTE J0103-728 underwent a large Type II outburst beginning on 2008 August 10. The source was consistently seen for…
Centaurus A at Hard X-rays and Soft Gamma-rays
H. Steinle
Centaurus A, at a distance of less than 4 Mpc, is the nearest radio-loud AGN. Its emission is detected from radio to very-high energy gamma-rays. Despite the fact that Cen A is one…
Do black hole masses scale with classical bulge luminosities only? The case of the two composite pseudobulge galaxies NGC3368 and NGC3489
Nina Nowak, Jens Thomas, Peter Erwin +3
It is now well established that all galaxies with a massive bulge component harbour a central supermassive black hole (SMBH). The mass of the SMBH correlates with bulge properties…
The first search for variable stars in the open cluster NGC 6253 and its surrounding field
Fabrizio De Marchi, Ennio Poretti, Marco Montalto +2
This work presents the first high-precision variability survey in the field of the intermediate-age, metal--rich open cluster NGC 6253. Clusters of this type are benchmarks for ste…
The Spectral Energy Distribution of Fermi bright blazars
A. A. Abdo, M. Ackermann, M. Ajello +107
(Abridged) We have conducted a detailed investigation of the broad-band spectral properties of the γ-ray selected blazars of the Fermi LAT Bright AGN Sample (LBAS). By combining ou…
A synthetic view of AGN evolution and supermassive black holes growth
Andrea Merloni
I will describe the constraints available from a study of AGN evolution synthesis models on the growth of the supermassive black holes (SMBH) population in the two main 'modes' obs…
Hydrodynamic simulations of correlation and scatter in galaxy cluster maps
A. Finoguenov, A. J. R. Sanderson, J. J. Mohr +2
The two dimensional structure of hot gas in galaxy clusters contains information about the hydrodynamical state of the cluster, which can be used to understand the origin of scatte…
Fermi Large Area Telescope Observations of the Cosmic-Ray Induced gamma-ray Emission of the Earth's Atmosphere
LAT collaboration
We report on measurements of the cosmic-ray induced gamma-ray emission of Earth's atmosphere by the Large Area Telescope onboard the Fermi Gamma-ray Space Telescope. The LAT has ob…
Inter-Comparison and Validation of Geant4 Photon Interaction Models
M. Augelli, M. Begalli, M. G. Pia +7
A R&D project, named Nano5, has been recently launched to study an architectural design in view of addressing new experimental issues related to particle transport in high energy p…
Recent Developments on PIXE Simulation with Geant4
M. G. Pia, G. Weidenspointner, M. Augelli +4
Particle induced X-ray emission (PIXE) is an important physical effect that is not yet adequately modelled in Geant4. This paper provides a critical analysis of the problem domain…