902 citations · 20.7k across the 297 of their papers we have counts for
8 papers · 2 filters
H.E.S.S. Observations of PKS 2155-304
The H. E. S. S. Collaboration, :, F. Aharonian
The high-frequency peaked BL Lac PKS 2155-304 at redshift z=0.117 has been detected with high significance (~45 sigma) at energies greater than 160 GeV, using the H.E.S.S. stereosc…
High-energy particle acceleration in the shell of a supernova remnant
H. E. S. S. Collaboration, :, F. Aharonian
A significant fraction of the energy density of the interstellar medium is in the form of high-energy charged particles (cosmic rays). The origin of these particles remains uncerta…
Revealing AGN by Polarimetry
Makoto Kishimoto, Robert Antonucci, Catherine Boisson +1
Polarimetric study in the UV and optical has been one of the keys to reveal the structure and nature of active galactic nuclei (AGN). Combined with the HST's high spatial resolutio…
The buried Balmer-edge signatures from quasars
Makoto Kishimoto, Robert Antonucci, Catherine Boisson +1
In our previous paper, we have reported the detection of a Balmer edge absorption feature in the polarized flux of one quasar (Ton 202). We have now found similar Balmer edge featu…
Very high energy gamma rays from the direction of Sagittarius A*
H. E. S. S. Collaboration, :, F. Aharonian
We report the detection of a point-like source of very high energy (VHE) gamma-rays coincident within 1' of Sgr A*, obtained with the H.E.S.S. array of Cherenkov telescopes. The ga…
Calibration of cameras of the H.E.S.S. detector
H. E. S. S. Collaboration, :, F. Aharonian
H.E.S.S. - the High Energy Stereoscopic System- is a new system of large atmospheric Cherenkov telescopes for GeV/TeV astronomy. Each of the four telescopes of 107 m^2 mirror area…
Accretion around supermassive black holes: the detection of the Balmer edge signature from quasars
Makoto Kishimoto, Robert Antonucci, Catherine Boisson +1
The ultraviolet/optical continuum of quasars is thought to be from an accretion flow around a supermassive black hole, and it dominates the radiative output of quasars. However, th…
Constraining the solutions of an inverse method of stellar population synthesis
J. Moultaka, C. Boisson, M. Joly +1
In three previous papers (Pelat 1997, 1998 and Moultaka & Pelat 2000), we set out an inverse stellar population synthesis method which uses a database of stellar spectra. Unlike ot…