Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.
- Centre National de la Recherche ScientifiqueFR1.6k papers
- Institut National de Physique Nucléaire et de Physique des ParticulesFR1.4k papers
- Heidelberg UniversityDE1.3k papers
- Max Planck SocietyDE1.1k papers
- University of ZurichCH1.1k papers
- European Organization for Nuclear ResearchCH1k papers
- Laboratoire de Physique Nucléaire et de Hautes ÉnergiesFR990 papers
- Institute of Nuclear Physics, Polish Academy of SciencesPL973 papers
- University of Maryland, College ParkUS940 papers
- Rutherford Appleton LaboratoryGB939 papers
- Institute for Nuclear ResearchRU922 papers
- Istituto Nazionale di Fisica Nucleare, Sezione di BolognaIT912 papers
35 papers · 2 filters
Modelling Plerion Spectra and their Evolution
Yves A. Gallant, Eric van der Swaluw, John G. Kirk +1
We review recent theoretical developments on pulsar winds, their nebulae and relativistic shock acceleration, and show how they illuminate unsolved problems in plerion spectra, in…
TeV Blazars and Cosmic Infrared Background Radiation
F. A. Aharonian
The recent developments in studies of TeV radiation from blazars are highlighted and the implications of these results for derivation of cosmologically important information about…
ISOPHOT - Photometric Calibration of Point Sources
B. Schulz, S. Huth, R. J. Laureijs +14
All observations by the aperture photometer (PHT-P) and the far-infrared (FIR) camera section (PHT-C) of ISOPHOT included reference measurements against stable internal fine calibr…
Cold dust in late-type Virgo Cluster galaxies
Cristina C. Popescu, Richard J. Tuffs, Heinrich J. Voelk +2
We have statistically analyzed the spatially integrated far-infrared (FIR) emissions of the complete volume- and luminosity-limited sample of late-type (later than S0) Virgo cluste…
External Compton emission from relativistic jets in Galactic black hole candidates and ultraluminous X-ray sources
M. Georganopoulos, F. A. Aharonian, J. G. Kirk
Galactic binary systems that contain a black hole candidate emit hard X-rays in their low luminosity mode. We show that this emission can be understood as due to the Compton scatte…
Limits on the TeV flux of diffuse gamma rays as measured with the HEGRA air shower array
HEGRA Collaboration, F. A. Aharonian
Using data from the HEGRA air shower array, taken in the period from April 1998 to March 2000, upper limits on the ratio I_gamma /I_CR of the diffuse photon flux I_gamma to the had…
Variability and spectral classification of LMC giants: results from DENIS and EROS
M-R. L. Cioni, J-B. Marquette, C. Loup +4
We present the first cross-identifications of sources in the near-infrared DENIS survey and in the micro-lensing EROS survey in a field of about 0.5 square degrees around the optic…
Reconnection in pulsar winds
J. G. Kirk, Y. Lyubarsky
The spin-down power of a pulsar is thought to be carried away in an MHD wind in which, at least close to the star, the energy transport is dominated by Poynting flux. The pulsar dr…
Formation and dynamics of self-sustained neutron haloes in disk accreting sources
A. A. Belyanin, E. V. Derishev
It has been recognized long ago that the presence of hot plasma in the inner accretion disks around black holes could lead to the neutron production via dissociation of helium nucl…
Dielectronic Recombination (via N=2 --> N'=2 Core Excitations) and Radiative Recombination of Fe XX: Laboratory Measurements and Theoretical Calculations
D. W. Savin, E. Behar, S. M. Kahn +13
We have measured the resonance strengths and energies for dielectronic recombination (DR) of Fe XX forming Fe XIX via N=2 --> N'=2 (Delta_N=0) core excitations. We have also calcul…
On the origin of highest energy gamma-rays from Mkn 501
F. A. Aharonian, A. N. Timokhin, A. V. Plyasheshnikov
The spectra of very high energy gamma-radiation from distant extragalactic objects suffer significant deformations during the passage of primary gamma-rays through the intergalacti…
Characteristics of air showers created by extremely high energy gamma-rays
A. V. Plyasheshnikov, F. A. Aharonian
The technique of adjoint cascade equations has been applied to calculate the properties of extremely high energy gamma-rays in the energy range 10^18--10^22 eV with taking into acc…
Particle acceleration by ultra-relativistic shocks: theory and simulations
Abraham Achterberg, Yves A. Gallant, John G. Kirk +1
We consider the acceleration of charged particles near ultra-relativistic shocks, with Lorentz factor Gamma_s >> 1. We present simulations of the acceleration process and compare t…
Limits on Pulsar Parameters for Pulsed detections with H.E.S.S
O. C. de Jager, A. Konopelko, B. C. Raubenheimer +1
The non-detection of pulsed sub-TeV gamma-rays from EGRET pulsars proves that the EGRET pulsed spectra of all gamma-ray pulsars should terminate at energies below a few hundred GeV…
Measurement of the Cherenkov light spectrum and of the polarization with the HEGRA-IACT-system
M. Doering, K. Bernloehr, G. Hermann +2
The HEGRA system of Imaging Atmospheric Cherenkov Telescopes (IACTs) detects Cherenkov light produced by air showers. The concept of stereoscopic observation with the five HEGRA te…
Search for point sources and diffuse emission from the Galactic plane with the HEGRA-IACT-system
H. Lampeitl, K. Bernloehr, A. Daum +4
The HEGRA-IACT-system with a FoV of ~1.5 deg radius has been used for surveying one quater of the Galactic disc in respect to point sources, moderately extended sources and for dif…
The beaming pattern and spectrum of inverse Compton radiation in blazars
M. Georganopoulos, J. G. Kirk, A. Mastichiadis
By including Klein-Nishina effects, we generalize previous calculations of the beaming pattern of photons produced by inverse Compton scattering. For an isotropic distribution of s…
Study of the photon flux from the night sky at La Palma and Namibia, in the wavelength region relevant for imaging atmospheric Cherenkov telescopes
S. Preuss, G. Hermann, W. Hofmann +1
The level of the night sky background light at La Palma and Namibia was determined, with emphasis on the wavelength region and solid angle coverage relevant for the operation of im…
One year of Galileo dust data from the Jovian system: 1996
H. Krüger, E. Grün, A. Graps +18
The dust detector system onboard Galileo records dust impacts in circumjovian space since the spacecraft has been injected into a bound orbit about Jupiter in December 1995. This i…
A study of Tycho's SNR at TeV energies with the HEGRA CT-System
F. A. Aharonian, A. G. Akhperjanian, J. A. Barrio +1
Tycho's supernova remnant (SNR) was observed during 1997 and 1998 with the HEGRA Cherenkov Telescope System in a search for gamma-ray emission at energies above ~1 TeV. An analysis…
A search for gamma-ray emission from the Galactic plane in the longitude range between 37 deg and 43 deg
HEGRA-Collaboration, F. Aharonian
Using the HEGRA system of imaging atmospheric Cherenkov telescopes, a region of the Galactic plane (-10 deg < b < 5 deg, 38 deg < l < 43 deg) was surveyed for TeV gamma-ray emissio…
Four years of Ulysses dust data: 1996 to 1999
H. Krüger, E. Grün, M. Landgraf +17
The Ulysses spacecraft is orbiting the Sun on a highly inclined ellipse (, perihelion distance 1.3 AU, aphelion distance 5.4 AU). Between January 1996 and December…
Tests of Galactic Cosmic Ray Source Models
L O'C Drury, D C Ellison, F A Aharonian +9
This report discusses the possibilities for observational tests of current models and ideas regarding the origin of the Galactic Cosmic Rays using facilities which are already avai…
Proton synchrotron radiation of large-scale jets in active galactic nuclei
F. A. Aharonian
I propose a new mechanism for explanation of nonthernal X-ray emission of large-scale AGN jets. Namely, I assume that this radiation has synchrotron origin emitted by extremely hig…