10.6k citations
Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.
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- University of GenevaCH577 papers
23 papers · 2 filters
The influence of collimation on the appearance of relativistic jets
P. O. Petrucci, T. Boutelier, G. Henri
The question of the collimation of relativistic jets is the subject of a lively debate in the community. We numerically compute the apparent velocity and the Doppler factor of a no…
Discovery and follow-up studies of the extended, off-plane, VHE gamma-ray source HESS J1507-622
H. E. S. S. Collaboration, F. Acero, F. Aharonian +167
Context: The detection of gamma-rays in the very-high-energy (VHE) range (100 GeV-100 TeV) offers the possibility of studying the parent population of ultrarelativistic particles f…
Reconciling observed GRB prompt spectra with synchrotron radiation ?
F. Daigne, Z. Bosnjak, Guillaume Dubus
(abridged)Prompt GRB emission is often interpreted as synchrotron radiation from high-energy electrons accelerated in internal shocks. Fast synchrotron cooling predicts that the ph…
Revisiting the Westerlund 2 Field with the H.E.S.S. Telescope Array
The HESS Collaboration, A. Abramowski, F. Acero +194
Aims. Previous observations with the H.E.S.S. telescope array revealed the existence of extended very-high-energy (VHE; E>100 GeV) γ-ray emission, HESS J1023-575, coincident with t…
X-ray absorption and occultation in LS 5039
Anna Szostek, Guillaume Dubus
Gamma-ray binaries are systems containing a massive star and a compact object that have been detected up to TeV energies. The high energy emission could result from particle accele…
Fermi Large Area Telescope Observation of a Gamma-ray Source at the Position of Eta Carinae
The Fermi LAT collaboration
The Large Area Telescope (LAT) onboard the Fermi Gamma-ray Space Telescope detected a gamma-ray source that is spatially consistent with the location of Eta Carinae. This source ha…
FERO: Finding Extreme Relativistic Objects. I. Statistics of Relativistic Fe Kalpha lines in Radio-Quiet Type 1 AGN
I. de la Calle Pérez, A. L. Longinotti, M. Guainazzi +10
Accretion models predict that fluorescence lines broadened by relativistic effects should arise from reflection of X-ray emission onto the inner region of the accretion disc surrou…
Discovery of the 51.47 day orbital period in the supergiant fast X-ray transient XTE J1739-302 with INTEGRAL
S. P. Drave, D. J. Clark, A. J. Bird +5
Timing analysis of ~12.4 Ms of INTEGRAL/IBIS data has revealed a period of 51.47 +/- 0.02 days in the supergiant fast X-ray transient source XTE J1739-302/IGR J17391-3021 that can…
High-energy radiation from the relativistic jet of Cygnus X-3
Benoit Cerutti, Guillaume Dubus, Gilles Henri
Cygnus X-3 is an accreting high-mass X-ray binary composed of a Wolf-Rayet star and an unknown compact object, possibly a black hole. The gamma-ray space telescope Fermi found defi…
The pertinence of Jet Emitting Discs physics to Microquasars: Application to Cygnus X-1
P. O. Petrucci, J. Ferreira, G. Henri +2
The interpretation of the X-ray spectra of X-ray binaries during their hard states requires a hot, optically thin medium. There are several accretion disc models in the literature…
Discovery of VHE gamma-rays from the BL Lac object PKS 0548-322
H. E. S. S. collaboration, :, F. Aharonian +168
PKS 0548-322 (z=0.069) is a ``high-frequency-peaked'' BL Lac object and a candidate very high energy (VHE, E>100 GeV) gamma-ray emitter, due to its high X-ray and radio flux. Obser…
Modeling the three-dimensional pair cascade in binaries. Application to LS 5039
Benoît Cerutti, Julien Malzac, Guillaume Dubus +1
LS 5039 is a Galactic binary system emitting high and very-high energy gamma rays. The gamma-ray flux is modulated on the orbital period and the TeV lightcurve shaped by photon-pho…
The orbital period in the supergiant fast X-ray transient IGR J16465--4507
D. J. Clark, V. Sguera, A. J Bird +6
Timing analysis of the INTEGRAL-IBIS and Swift-BAT light curves of the Supergiant Fast X-ray Transient (SFXT) IGR J16465-4507 has identified a period of 30.32+/-0.02 days which we…
VHE gamma-ray emission of PKS 2155-304: spectral and temporal variability
HESS Collaboration, A. Abramowski, F. Acero +185
Observations of very high energy gamma-rays from blazars provide information about acceleration mechanisms occurring in their innermost regions. Studies of variability in these obj…
Multi-wavelength Observations of H 2356-309
HESS Collaboration, A. Abramowski, F. Acero +184
AIMS: The properties of the broad-band emission from the high-frequency peaked BL Lac H 2356-309 (z=0.165) are investigated. METHODS: Very High Energy (VHE; E > 100 GeV) observatio…
First detection of VHE gamma-rays from SN 1006 by H.E.S.S
HESS Collaboration, F. Acero, F. Aharonian +175
Recent theoretical predictions of the lowest very high energy (VHE) luminosity of SN 1006 are only a factor 5 below the previously published H.E.S.S. upper limit, thus motivating f…
Discovery of a GeV blazar shining through the Galactic plane
J. Vandenbroucke, R. Buehler, M. Ajello +19
The \emph{Fermi} Large Area Telescope (LAT) discovered a new gamma-ray source near the Galactic plane, \object{Fermi J0109+6134}, when it flared brightly in 2010 February. The low…
Relativistic Doppler-boosted emission in gamma-ray binaries
G. Dubus, B. Cerutti, G. Henri
Gamma-ray binaries could be compact pulsar wind nebulae formed when a young pulsar orbits a massive star. The pulsar wind is contained by the stellar wind of the O or Be companion,…
No evidence for black hole spin powering of jets in X-ray binaries
Rob Fender, Elena Gallo, David Russell
In this paper we take the reported measurements of black hole spin for black hole X-ray binaries, and compare them against measurements of jet power and speed across all accretion…
The First Catalog of Active Galactic Nuclei Detected by the Fermi Large Area Telescope
A. A. Abdo
We present the first catalog of active galactic nuclei (AGN) detected by the LAT, corresponding to 11 months of data collected in scientific operation mode. The First LAT AGN Catal…
The relativistic jet of Cygnus X-3 in gamma rays
G. Dubus, B. Cerutti, G. Henri
High energy gamma-rays have been detected from Cygnus X-3, a system composed of a Wolf-Rayet star and a black hole or neutron star. The gamma-ray emission is linked to the radio em…
Fermi Large Area Telescope First Source Catalog
LAT Collaboration
We present a catalog of high-energy gamma-ray sources detected by the Large Area Telescope (LAT), the primary science instrument on the Fermi Gamma-ray Space Telescope (Fermi), dur…
Variability of X-ray binaries from an oscillating hot corona
C. Cabanac, G. Henri, P. - O Petrucci +3
The spectral and timing properties of an oscillating hot thermal corona are investigated. This oscillation is assumed to be due to a magneto-acoustic wave propagating within the co…