Preface.- Preface.- New INTEGRAL sources and TeV emission.- Status of identification of VHE ?-ray sources.- INTEGRAL/XMM views on the MeV source GRO J1411-64.- Evidence for a new MeV source observed by the COMPTEL experiment aboard CGRO.- Transient X-ray sources in the field of the unidentified gamma-ray source TeV J2032+4130 in Cygnus.- Source population synthesis and the Galactic diffuse gamma-ray emission.- Population studies of the unidentified EGRET sources.- Gamma-ray source stacking analysis at low galactic latitudes.- Identification of high energy gamma-ray sources and source populations in the era of deep all-sky coverage.- The blazar sequence: validity and predictions.- Gamma-ray luminosity function of blazars and the cosmic gamma-ray background: evidence for the luminosity-dependent density evolution.- Unidentified EGRET sources and the extragalactic gamma-ray background.- Blazar duty-cycle at ?-ray frequencies: constraints from extragalactic background radiation and prospects for AGILE and GLAST.- Modeling the emission processes in blazars.- Internal absorption of gamma-rays in relativistic blobs of active galactic nuclei.- Observations of AGNs using PACT.- Fermi acceleration in astrophysical jets.- High-energy cosmology.- HESS observations of extragalactic objects.- FIRST radio counterpart candidates to ULXs: a catalogue.- Numerical studies on the structure of the cosmic ray electron halo in starburst galaxies.- Synchrotron emission in the fast cooling regime: which spectra can be explained?.- Spectral properties of shocked accretion flows— a self-consistent study.- Particle acceleration at multiple internal relativistic shocks.- Mechanism of light curve variability in the gamma ray bursts.- High energy processes in pulsar wind nebulae.- Nucleonicgamma-ray production in pulsar wind nebulae.- Associations of very high energy gamma-ray sources discovered by H.E.S.S. with pulsar wind nebulae.- Demystifying an unidentified EGRET source by VHE gamma-ray observations.- Multiwavelength observations of the two unidentified EGRET sources 3EG J0616-3310 and 3EG J1249-8330.- INTEGRAL observations of TeV plerions.- The Geminga fraction.- An algorithm for solving the pulsar equation.- Pulsar simulation tools for GLAST.- Pulsar sensitivity studies of the GLAST large area telescope.- Population statistics study of radio and gamma-ray pulsars in the Galactic plane.- Radio-to-TeV ?-ray emission from PSR B1259–63.- Modulation of the high energy ?-ray flux from PSR B1259-63/SS2883 due to the orbital variation of the maximum energy of accelerated electrons.- Gamma-ray binaries.- Supermassive binary black holes among cosmic gamma-ray sources.- H.E.S.S. observations of LS 5039.- Results from MAGIC’s first observation cycle on galactic sources.- INTEGRAL serendipitous detection of the gamma-ray microquasar LS 5039.- Whipple telescope observations of LS I +61 303: 2004–2006.- Spectral fit of Cygnus X-1 in high energy— a self-consistent study.- The search for hot spots associated with the Cygnus X-3 relativistic jet.- The black-hole candidate XTE J1817-330 as seen by XMM-Newton and INTEGRAL.- Theoretical overview on high-energy emission in microquasars.- High-energy gamma-ray emission from the inner jet of LS I +61 303: the hadronic contribution revisited.- Secondary leptons synchrotron emission from microquasar jets.- Collective effects of stellar winds and unidentified gamma-ray sources.- Gamma rays from colliding winds of massive stars.- Gamma rays from halos around stars and the Sun.- Gamma rays from molecularclouds.- 3EG J2020+4017, the ?-Cygni source—before GLAST.- Morphological and spectral studies of the shell-type supernova remnants RX J1713.7–3946 and RX J0852.0–4622 with H.E.S.S..- Gamma-ray emission expected from Kepler’s SNR.- New evidence for strong nonthermal effects in Tycho’s supernova remnant.- Hard X-ray emission from the SNR G337.2+0.1.- A possible explanation of photon emission from supernova remnants by jitter radiation.- Cosmic neutrinos from the sources of galactic and extragalactic cosmic rays.- Detection potential to point-like neutrino sources with the NEMO-km3 telescope.- Upper limits on neutrino fluxes from point-like sources with AMANDA-II.- Potential neutrino signals in a northern hemisphere neutrino telescope from galactic gamma-ray sources.- Underground water Cherenkov muon detector array with the Tibet air shower array for gamma-ray astronomy in the 100 TeV region.- Study on the possible detection of Gamma Ray Bursts with the ANTARES neutrino telescope.- Determination of the atmospheric neutrino flux from experimental data.- On origin of ultra high energy cosmic rays.- Gamma ray signatures of ultra high energy cosmic ray accelerators: electromagnetic cascade versus synchrotron radiation of secondary electrons.- Search for correlations of GRB and cosmic rays.- Cosmology and VHE gamma ray astrophysics: connections and perspectives.- A low density of the extragalactic background light revealed by the H.E.S.S. spectra of the BL Lac objects 1ES?1101-232 and H?2356-309.- Observations of extragalactic sources with the MAGIC telescope.- Dark matter: the connection with gamma-ray astrophysics.- The impact of subhalos on the gamma-ray signal from dark matter annihilation.- GLAST large area telescope multiwavelength planning.-Unravelling unidentified ?-ray sources with the large millimeter telescope.- Search for GRB related prompt optical emission and other fast varying objects with “Pi of the Sky” detector.- GRBs search results with the ARGO-YBJ experiment operated in scaler mode.- The design of diamond Compton telescope.